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Free Elektor magazine February 2012 Get a FREE copy of Elektor magazine’s February issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0212 into your shopping cart. The magazine will add 5.3 ounces to the package weight when calculating your shipping options.

	On sale! Pololu item #: 1560 Price: $249.95 $450.00 Quantity:
Dagu Wild Thumper 6WD All-Terrain Chassis, Silver, 34:1 This rugged, 6-wheel-drive chassis from Dagu Electronics has independent suspension for each of its spiked 120mm-diameter wheels, allowing exceptional traction over uneven terrain, and its body is made from 2mm-thick anodized aluminum with a 10mm-pitch grid of 4mm holes, making it easy to mount electronics and accessories to the chassis. Assembly of the chassis is a simple three-step process that takes just minutes. This model is silver with chrome-colored hubs and has 34:1 steel gearboxes on the motors.

	On sale! Pololu item #: 1561 Price: $249.95 $450.00 Quantity:
Dagu Wild Thumper 6WD All-Terrain Chassis, Silver, 75:1 This rugged, 6-wheel-drive chassis from Dagu Electronics has independent suspension for each of its spiked 120mm-diameter wheels, allowing exceptional traction over uneven terrain, and its body is made from 2mm-thick anodized aluminum with a 10mm-pitch grid of 4mm holes, making it easy to mount electronics and accessories to the chassis. Assembly of the chassis is a simple three-step process that takes just minutes. This model is silver with chrome-colored hubs and has 75:1 steel gearboxes on the motors.

	On sale! Pololu item #: 1562 Price: $249.95 $450.00 Quantity:
Dagu Wild Thumper 6WD All-Terrain Chassis, Black, 34:1 This rugged, 6-wheel-drive chassis from Dagu Electronics has independent suspension for each of its spiked 120mm-diameter wheels, allowing exceptional traction over uneven terrain, and its body is made from 2mm-thick anodized aluminum with a 10mm-pitch grid of 4mm holes, making it easy to mount electronics and accessories to the chassis. Assembly of the chassis is a simple three-step process that takes just minutes. This model is black with chrome-colored hubs and has 34:1 steel gearboxes on the motors.

	On sale! Pololu item #: 1563 Price: $249.95 $450.00 Quantity:
Dagu Wild Thumper 6WD All-Terrain Chassis, Black, 75:1 This rugged, 6-wheel-drive chassis from Dagu Electronics has independent suspension for each of its spiked 120mm-diameter wheels, allowing exceptional traction over uneven terrain, and its body is made from 2mm-thick anodized aluminum with a 10mm-pitch grid of 4mm holes, making it easy to mount electronics and accessories to the chassis. Assembly of the chassis is a simple three-step process that takes just minutes. This model is black with 75:1 steel gearboxes on the motors. It might have metallic-red hubs (as shown in the main product picture) or gold hubs (not pictured).

	On sale! Pololu item #: 1675 Price: $49.95 $79.95 Quantity:
RC Snap Circuits Rover The RC Snap Circuits Rover is a mobile, radio-controlled Snap Circuits platform. Build the 23 included projects and create many of your own circuits with the ample circuit-building space on top of this four-wheeled chassis. The included manual has projects that explore the fundamentals of circuit design and radio control.

	On sale! Pololu item #: 1659 Price: $249.95 $399.95 Quantity:
Elenco 500-In-One Electronic Project Lab Learn electronics with the Elenco 500-In-One Electronic Project Lab! This kit includes everything you need to get started building your own electronic circuits. The largest of the project labs, this kit contains all the fun and education of the smaller kits, and takes your education a step further by teaching its users about microcontrollers and programming. This kit includes the six required AA batteries.

	On sale! Pololu item #: 1263 Price: $84.95 $125.00 Quantity:
CHR-6d Inertial Measurement Unit This six-DOF IMU from CH Robotics packs three accelerometer axes, three gyroscope axes, and a STM32F103T8 ARM Cortex processor into a tiny, 0.8" x 0.7" x 0.1" board. The small size and light weight (1.5 g) make the board well suited for unmanned aerial vehicle (UAV) navigation. The integrated 32-bit MPU takes 16-bit readings of the sensors, applies a customizable filter, and reports the results via a TTL serial interface. The Cortex’s programming pins are exposed, and the firmware is open-source.

	On sale! Pololu item #: 331 Price: $3.99 $5.75 Quantity:
PCB02A 8-pin PIC prototyping PCB This printed circuit board is designed for building your own circuits based on Microchip Technology’s line of 8-pin PIC microcontrollers. The board holds a PIC and the basic circuitry necessary to run it. The rest of the board is available for your custom circuits.

	On sale! Pololu item #: 1671 Price: $41.99 $59.95 Quantity:
Snap Circuits 300-in-1 SC-300 Snap Circuits 300-in-1 includes over 55 plastic parts and over 300 sample projects. The snap-together electronic blocks are mounted on plastic pieces that can be used again and again to form many exciting and educational circuits.

	On sale! Pololu item #: 1655 Price: $45.95 $64.95 Quantity:
Elenco 75-In-One Electronic Project Lab Learn electronics with the Elenco 75-In-One Electronic Project Lab! This kit includes everything you need to get started building your own electronic circuits. Components such as resistors, capacitors, LEDs, ICs and more are securely attached to the electronic lab so you can spend less time searching for components and more time learning how to build that next circuit! This kit requires four AA batteries (not included).

	On sale! Pololu item #: 1682 Price: $10.95 $15.00 Quantity:
Tamiya 70188 Mini Motor Gearbox (8-Speed) Kit Tamiya’s 8-speed mini motor gearbox features a more compact 030-form-factor motor driving a single gear train that can be assembled to have one of eight gear ratios: 7.5:1, 9.5:1, 15.7:1, 19.9:1, 32.9:1, 41.8:1, 79.1:1, or 87.8:1.

	On sale! Pololu item #: 1683 Price: $10.95 $15.00 Quantity:
Tamiya 70190 Mini Motor Multi-Ratio Gearbox (12-Speed) Kit Tamiya’s 12-speed multi-ratio mini motor gearbox features a more compact 030-form-factor motor driving a single gear train that can be assembled to have one of 12 gear ratios: 4.6:1, 5.1:1, 9.7:1, 10.8:1, 20.4:1, 22.6:1, 42.8:1, 47.5:1, 89.9:1, 99.8:1, 188.7:1, or 209.7:1.

	On sale! Pololu item #: 1684 Price: $10.95 $15.00 Quantity:
Tamiya 70189 Mini Motor Low-Speed Gearbox (4-Speed) Kit Tamiya’s 4-speed low-speed mini motor gearbox features a more compact 030-form-factor motor driving a single gear train that can be assembled to have one of 4 gear ratios: 71.4:1, 149.9:1, 314.9:1, or 661.2:1. The gear train includes a self-locking worm gear.

	On sale! Pololu item #: 2303 Price: $109.95 $149.95 Quantity:
Linear Actuator with Feedback: 2" Stroke, 12V, 20:1 (LACT2P-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 2-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2305 Price: $109.95 $149.95 Quantity:
Linear Actuator with Feedback: 4" Stroke, 12V, 20:1 (LACT4P-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 4-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2307 Price: $109.95 $149.95 Quantity:
Linear Actuator with Feedback: 6" Stroke, 12V, 20:1 (LACT6P-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 6-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2309 Price: $109.95 $149.95 Quantity:
Linear Actuator with Feedback: 8" Stroke, 12V, 20:1 (LACT8P-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has an 8-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2311 Price: $109.95 $149.95 Quantity:
Linear Actuator with Feedback: 10" Stroke, 12V, 20:1 (LACT10P-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 10-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 2313 Price: $109.95 $149.95 Quantity:
Linear Actuator with Feedback: 12" Stroke, 12V, 20:1 (LACT12P-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 12-inch stroke and a built-in potentiometer for position feedback.

	On sale! Pololu item #: 114 Price: $9.25 $12.50 Quantity:
Tamiya 70168 Double Gearbox Kit Tamiya’s double gearbox packs two independent gear trains into a compact and affordable package that is great for small mobile robots. Each side can be assembled to have one of four gear ratios: 12.7:1, 38:1, 115:1, or 344:1.

	On sale! Pololu item #: 1672 Price: $66.99 $89.95 Quantity:
Snap Circuits Pro 500-in-1 SC-500 Snap Circuits 500-in-1 includes over 65 plastic parts and over 500 sample projects. The snap-together electronic blocks are mounted on plastic pieces that can be used again and again to form many exciting and educational circuits.

	On sale! Pololu item #: 61 Price: $8.95 $12.00 Quantity:
Tamiya 70097 Twin-Motor Gearbox Kit Tamiya’s twin-motor gearbox consists of two independent motors and gearboxes in one compact housing, making it perfect for small robots. You can assemble the gearboxes to have a 58:1 or a 204:1 gear ratio.

	On sale! Pololu item #: 2302 Price: $89.95 $119.95 Quantity:
Linear Actuator: 2" Stroke, 12V, 20:1 (LACT2-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 2-inch stroke and no potentiometer.

	On sale! Pololu item #: 2304 Price: $89.95 $119.95 Quantity:
Linear Actuator: 4" Stroke, 12V, 20:1 (LACT4-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 4-inch stroke and no potentiometer.

	On sale! Pololu item #: 2306 Price: $89.95 $119.95 Quantity:
Linear Actuator: 6" Stroke, 12V, 20:1 (LACT6-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 6-inch stroke and no potentiometer.

	On sale! Pololu item #: 2308 Price: $89.95 $119.95 Quantity:
Linear Actuator: 8" Stroke, 12V, 20:1 (LACT8-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 8-inch stroke and no potentiometer.

	On sale! Pololu item #: 2310 Price: $89.95 $119.95 Quantity:
Linear Actuator: 10" Stroke, 12V, 20:1 (LACT10-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 10-inch stroke and no potentiometer.

	On sale! Pololu item #: 2312 Price: $89.95 $119.95 Quantity:
Linear Actuator: 12" Stroke, 12V, 20:1 (LACT12-12V-20) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 20:1 reduction gearbox that gives the actuator a dynamic load rating of 110 lbs (50 kg) and a maximum speed of 0.5 in/s (1.3 cm/s), and it is rated to withstand up to 500 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 12-inch stroke and no potentiometer.

	On sale! Pololu item #: 2326 Price: $89.95 $119.95 Quantity:
Linear Actuator: 12" Stroke, 12V, 5:1 (LACT12-12V-5) This high-quality 12 V linear actuator can be used in a variety of heavy-duty applications. The motor has 5:1 reduction gearbox that gives the actuator a dynamic load rating of 34 lbs (15 kg) and a maximum speed of 1.7 in/s (4.3 cm/s), and it is rated to withstand up to 450 lbs when not moving. Limit switches at each end make the actuator easy to control over its full range of motion, and the worm drive ensures that the shaft will hold its position even when unpowered. This version has a 12-inch stroke and no potentiometer.

	On sale! Pololu item #: 68 Price: $8.29 $11.00 Quantity:
Tamiya 70110 4-Speed Crank-Axle Gearbox Kit This gearbox has four possible gear ratios, including the highest gear ratio of Tamiya’s gearbox series, 5402:1. The other options are 126:1, 441:1, and 1543:1. This gearbox also features a worm gear, which locks the output shaft when the motor is not turning.

	On sale! Pololu item #: 1694 Price: $28.50 $37.00 Quantity:
Tamiya 70198 Wall-Hugging Mouse Tamiya’s wall-hugging mouse is a fun and easy-to-build kit that’s great for new robot enthusiasts, and it can serve as a unique, hackable robot chassis for more advanced users. The mouse has no digital electronics; rather, a simple wire bumper along its side directs current to one of two motors to keep the mouse moving along the wall. The mouse features a hard plastic shell and runs on one alkaline AA battery.

	On sale! Pololu item #: 1689 Price: $23.95 $31.00 Quantity:
Tamiya 70195 Wall-Hugging Ladybug Tamiya’s wall-hugging ladybug is a fun and easy-to-build kit that’s great for new robot enthusiasts, and it can serve as a unique, hackable robot chassis for more advanced users. The ladybug has no digital electronics; rather, a simple wire bumper along its side directs current to one of two motors to keep the ladybug moving along the wall. The ladybug features a hard plastic shell and runs on one alkaline AA battery.

	On sale! Pololu item #: 1676 Price: $78.95 $99.95 Quantity:
Deluxe RC Snap Circuits Rover The Deluxe RC Snap Circuits Rover is a mobile, radio-controlled Snap Circuits platform. Build the 63 included projects (including a rover that shoots a disc at the push of a button!) and create many of your own circuits with the ample circuit-building space on top of this four-wheeled chassis. The included manual has projects that explore the fundamentals of circuit design and radio control.

	On sale! Pololu item #: 74 Price: $13.95 $17.50 Quantity:
Tamiya 72005 6-Speed Gearbox Kit This versatile, high-efficiency gearbox lets you build one of the following gear ratios: 11.6:1, 29.8:1, 76.5:1, 196.7:1, 505.9:1, and 1300.9:1. Whatever your application, chances are that one of the configurations will do the job.

	On sale! Pololu item #: 123 Price: $395.00 $495.00 Quantity:
Tamiya 58280 TXT-1 (4x4x4) The TXT-1 is designed like a full-size monster truck with an aluminum ladder frame and multi-link suspension. Solid axles with a cantilever system allows for massive suspension articulation. This kit includes hardware and a second servo saver for four wheel steering. The servos are located next to the axles for direct steering. The kit requires a 2 or 3 channel radio and can operate on a 7.2V or 8.4V battery.

	On sale! Pololu item #: 64 Price: $3.60 $4.40 Quantity:
Tamiya 70096 Off-Road Tires (2 tires) The two extremely springy tires in the Tamiya 70096 off-road tires set are about 50 mm in diameter and 30 mm wide. Use these if you want your robot to have a soft, air-cushioned ride across rough terrain. (Compatible with the Tamiya gearbox numbers 70093, 70097, 70103, and 70110, 70167, and 70168).

	On sale! Pololu item #: 76 Price: $31.95 $39.00 Quantity:
Tamiya 75020 Line Tracing Snail Kit The Line Tracing Snail is an excellent, low-cost robot for a new robotics enthusiast that has no previous experience with robots or electronics. All electronics are completely pre-assembled, and mechanical assembly is very straightforward. The snail has two speeds, and for added fun and entertainment, the eye stalks wiggle back and forth as the robot runs.

	On sale! Pololu item #: 726 Price: $24.95 $29.95 Quantity:
Maxbotix LV-MaxSonar-EZ1 Sonar Range Finder MB1010 This compact sonar range finder by Maxbotix detects objects from 0 to 6.45 m (21.2 ft) with a resolution of 2.5 cm (1") for distances beyond 15 cm (6"). Unlike other sonar range finders, the LV-MaxSonar has virtually no dead zone: it can detect even small objects up to and touching the front sensor face! The EZ0, EZ1, EZ2, EZ3, and EZ4 versions have progressively narrower beam angles.

	On sale! Pololu item #: 1670 Price: $24.99 $29.95 Quantity:
Snap Circuits Jr. 100-in-1 SC-100 Snap Circuits Jr. 100-in-1 includes over 30 plastic parts and over 100 sample projects. The snap-together electronic blocks are mounted on plastic pieces that can be used again and again to form many exciting and educational circuits.

	On sale! Pololu item #: 302 Price: $16.95 $19.95 Quantity:
Elenco 21-881 Sound Reversing Car This kit is a low-cost implementation of the common introductory robot that backs up and turns when it hears a sound or hits an obstacle. The kit is quite basic, but because the instructions do not provide soldering instructions, we recommend this kit for someone who has completed at least one previous soldering project.

	On sale! Pololu item #: 65 Price: $4.10 $4.80 Quantity:
Tamiya 70101 Truck Tire Set (4 tires) The Tamiya 70101 truck tire set contains four 36 mm-diameter wheels with hard, rubber, 16 mm-wide treads. Our small round robot chassis is designed to use a pair of these wheels, which are great for making small robots! (Compatible with the Tamiya gearbox numbers 70093, 70097, 70103, and 70110, 70167, and 70168).

	On sale! Pololu item #: 1564 Price: $214.95 $250.00 Quantity:
Dagu Wild Thumper 4WD All-Terrain Chassis, Silver, 34:1 This rugged, 4-wheel-drive chassis from Dagu Electronics has independent suspension for each of its spiked 120mm-diameter wheels, allowing exceptional traction over uneven terrain, and its body is made from 2mm-thick anodized aluminum with a 10mm-pitch grid of 4mm holes, making it easy to mount electronics and accessories to the chassis. Assembly of the chassis is a simple three-step process that takes just minutes. This model is silver with chrome-colored hubs and has 34:1 steel gearboxes on the motors.

	On sale! Pololu item #: 1565 Price: $214.95 $250.00 Quantity:
Dagu Wild Thumper 4WD All-Terrain Chassis, Silver, 75:1 This rugged, 4-wheel-drive chassis from Dagu Electronics has independent suspension for each of its spiked 120mm-diameter wheels, allowing exceptional traction over uneven terrain, and its body is made from 2mm-thick anodized aluminum with a 10mm-pitch grid of 4mm holes, making it easy to mount electronics and accessories to the chassis. Assembly of the chassis is a simple three-step process that takes just minutes. This model is silver with chrome-colored hubs and has 75:1 steel gearboxes on the motors.

	On sale! Pololu item #: 1566 Price: $214.95 $250.00 Quantity:
Dagu Wild Thumper 4WD All-Terrain Chassis, Black, 34:1 This rugged, 4-wheel-drive chassis from Dagu Electronics has independent suspension for each of its spiked 120mm-diameter wheels, allowing exceptional traction over uneven terrain, and its body is made from 2mm-thick anodized aluminum with a 10mm-pitch grid of 4mm holes, making it easy to mount electronics and accessories to the chassis. Assembly of the chassis is a simple three-step process that takes just minutes. This model is black with 34:1 steel gearboxes on the motors. It might have metallic-red hubs (as shown in the main product picture) or gold hubs (not pictured).

	On sale! Pololu item #: 1567 Price: $214.95 $250.00 Quantity:
Dagu Wild Thumper 4WD All-Terrain Chassis, Black, 75:1 This rugged, 4-wheel-drive chassis from Dagu Electronics has independent suspension for each of its spiked 120mm-diameter wheels, allowing exceptional traction over uneven terrain, and its body is made from 2mm-thick anodized aluminum with a 10mm-pitch grid of 4mm holes, making it easy to mount electronics and accessories to the chassis. Assembly of the chassis is a simple three-step process that takes just minutes. This model is black with 75:1 steel gearboxes on the motors. It might have metallic-red hubs (as shown in the main product picture) or gold hubs (not pictured).

	On sale! Pololu item #: 1657 Price: $79.95 $92.95 Quantity:
Elenco 200-In-One Electronic Project Lab Learn electronics with the Elenco 200-In-One Electronic Project Lab! This kit includes everything you need to get started building your own electronic circuits. Components such as resistors, capacitors, LEDs, ICs and more are securely attached to the electronic lab so you can spend less time searching for components and more time learning how to build that next circuit! This kit requires six AA batteries (not included).

	On sale! Pololu item #: 118 Price: $7.55 $8.75 Quantity:
Tamiya 70167 Single Gearbox (4-Speed) Kit The single gearbox is perfect if you like the gear ratio options of the 70168 double gearbox but need just one motor or added flexibility in positioning multiple output shafts. Available gear ratios are: 12.7:1, 38:1, 115:1, or 344:1.

	On sale! Pololu item #: 70 Price: $15.99 $18.50 Quantity:
Tamiya 72001 Planetary Gearbox Kit The first in Tamiya’s “high efficiency” series, the planetary gearbox features two 4:1 and two 5:1 stages that can be combined in any way you like—you can even combine two kits to get really huge gear ratios. The output is always conveniently on the same axis as the motor shaft. Available gear ratios are 4:1, 5:1, 16:1, 20:1, 25:1, 80:1, 100:1, and 400:1.

	On sale! Pololu item #: 2314 Price: $12.95 $14.93 Quantity:
Mounting Bracket for LD Linear Actuators This machined aluminum bracket allows the LD linear actuators to be mounted to a structure. Complete mounting hardware is included. Two brackets are required for mounting each actuator.

	On sale! Pololu item #: 69 Price: $7.59 $8.75 Quantity:
Tamiya 70103 Universal Gearbox Kit Unlike the other gearboxes in Tamiya’s series, the universal gearbox has a thin metal frame, making it the smallest Tamiya gearbox. The final two gears are metal, making for a tough output. A worm gear allows for the high gear ratio options of 101:1, 269:1, and 719:1.

	On sale! Pololu item #: 1127 Price: $3.45 $3.95 Quantity:
Solarbotics RW2i Wheel (internal set screw) The RW2i rubber wheel features an internal set screw ideal for designs with space constraints. The 1.23-inch diameter wheel by Solarbotics is made for 3 mm diameter output shafts. These wheels are sold individually, NOT in pairs.

	On sale! Pololu item #: 71 Price: $10.95 $12.50 Quantity:
Tamiya 72002 High-Speed Gearbox Kit The high-speed gearbox can be assembled in 11.6:1 and 18:1 gear ratios. This high-efficiency gearbox is therefore suited for very fast vehicles or other fast mechanisms that do not require high torque.

	On sale! Pololu item #: 72 Price: $10.95 $12.50 Quantity:
Tamiya 72003 High-Power Gearbox Kit With possible gear ratios of 41.7:1 and 64.8:1, the high-power gearbox is well-suited for most vehicles that require a balance of speed and torque.

	On sale! Pololu item #: 73 Price: $10.95 $12.50 Quantity:
Tamiya 72004 Worm Gearbox Kit The primary feature of this high-efficiency gear box is a worm gear, which locks the output shaft whenever the motor is not turning. The high gear ratios of 216:1 or 336:1 make this gearbox appropriate for small walking robots, lifting mechanisms, and other applications where high torque is desired.

	On sale! Pololu item #: 723 Price: $26.95 $29.95 Quantity:
Maxbotix LV-MaxSonar-EZ0 Sonar Range Finder MB1000 This compact sonar range finder by Maxbotix detects objects from 0 to 6.45 m (21.2 ft) with a resolution of 2.5 cm (1") for distances beyond 15 cm (6"). Unlike other sonar range finders, the LV-MaxSonar has virtually no dead zone: it can detect even small objects up to and touching the front sensor face! The EZ0, EZ1, EZ2, EZ3, and EZ4 versions have progressively narrower beam angles.

	On sale! Pololu item #: 762 Price: $26.95 $29.95 Quantity:
Dual Chassis Completion Kit for RRC01A This discounted combination of Tamiya’s twin-motor gearbox, ball caster, and truck tires is meant for use with two Pololu round robot chassis.

	On sale! Pololu item #: 792 Price: $26.95 $29.95 Quantity:
Maxbotix LV-MaxSonar-EZ2 Sonar Range Finder MB1020 This compact sonar range finder by Maxbotix detects objects from 0 to 6.45 m (21.2 ft) with a resolution of 2.5 cm (1") for distances beyond 15 cm (6"). Unlike other sonar range finders, the LV-MaxSonar has virtually no dead zone: it can detect even small objects up to and touching the front sensor face! The EZ0, EZ1, EZ2, EZ3, and EZ4 versions have progressively narrower beam angles.

	On sale! Pololu item #: 793 Price: $26.95 $29.95 Quantity:
Maxbotix LV-MaxSonar-EZ3 Sonar Range Finder MB1030 This compact sonar range finder by Maxbotix detects objects from 0 to 6.45 m (21.2 ft) with a resolution of 2.5 cm (1") for distances beyond 15 cm (6"). Unlike other sonar range finders, the LV-MaxSonar has virtually no dead zone: it can detect even small objects up to and touching the front sensor face! The EZ0, EZ1, EZ2, EZ3, and EZ4 versions have progressively narrower beam angles.

	On sale! Pololu item #: 794 Price: $26.95 $29.95 Quantity:
Maxbotix LV-MaxSonar-EZ4 Sonar Range Finder MB1040 This compact sonar range finder by Maxbotix detects objects from 0 to 6.45 m (21.2 ft) with a resolution of 2.5 cm (1") for distances beyond 15 cm (6"). Unlike other sonar range finders, the LV-MaxSonar has virtually no dead zone: it can detect even small objects up to and touching the front sensor face! The EZ0, EZ1, EZ2, EZ3, and EZ4 versions have progressively narrower beam angles.

	On sale! Pololu item #: 761 Price: $18.45 $20.50 Quantity:
Single Chassis Completion Kit for RRC01A This discounted combination of Tamiya’s twin-motor gearbox, ball caster, and truck tires is meant for use with one Pololu round robot chassis.

	On sale! Pololu item #: 1634 Price: $4.49 $4.95 Quantity:
Alcohol Gas Sensor MQ-3 This semiconductor gas sensor detects the presence of alcohol gas at concentrations from 0.05 mg/L to 10 mg/L, a range suitable for making a breathalyser. The sensor’s simple analog voltage interface requires only one analog input pin from your microcontroller.

	On sale! Pololu item #: 947 Price: $49.95 $53.95 Quantity:
OWI-535 Robotic Arm Edge Kit The OWI-535 Robotic Arm Edge Kit is a remote-controlled robotic arm kit with five degrees of freedom, a 3.5oz (100g) lifting capacity, and an LED light. Using five motors with gearboxes, the Edge has a 120° wrist motion, a 300° elbow motion, a 180° shoulder motion, a 270° base motion, and a 0-1.77" (0-4.5cm) gripping motion.

	On sale! Pololu item #: 66 Price: $5.99 $6.25 Quantity:
Tamiya 70144 Ball Caster Kit (2 casters) Tamiya’s steel-ball caster is a good way to give a “third wheel” to a small robot powered by a differential drive. The kit comes with enough parts to make two casters, either 25 mm or 35 mm in height.

	On sale! Pololu item #: 82 Price: $34.95 $36.45 Quantity:
iBOTZ MR-1004 Hydrazoid The iBOTZ Hydrazoid is a good beginner robot kit that features the basic robotic action of sound detection. The Hydrazoid robot has four spindly legs and fiber-optic antennas that give this sound-detecting robot a unique, extra-terrestrial look. When the Hydrazoid "hears" a sound with its condenser microphone, its single DC motor activates, and the robot walks forward for about 12 seconds and then stops until it hears another sound.

	On sale! Pololu item #: 948 Price: $12.95 $13.49 Quantity:
GWS S35 STD Continuous Rotation Servo The GWS35 continuous rotation servo is a standard-sized servo that has been built by GWS for continuous rotation. Since servos have their own integrated control circuitry, this unit gives you an easy way to get your robot moving.

	On sale! Pololu item #: 63 Price: $7.25 $7.50 Quantity:
Tamiya 70145 Narrow Tire Set (2 tires) Use the pair of tires in the Tamiya 70145 narrow tire set for small and medium-sized robots that must make precise movements. With a 58 mm diameter and solid, rounded, 16 mm treads, these wheels will let your robot turn with little friction, even on rough surfaces like carpet. These wheels are compatible with all Tamiya gearbox kits.

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Free Elektor magazine July/August 2009 Get a FREE copy of Elektor magazine’s first USA Summer Circuits issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. The magazine will add 9 ounces to the package weight when calculating your shipping options. (We no longer have this issue in stock.)

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Free Elektor magazine September 2009 Get a FREE copy of Elektor magazine’s September issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0909 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine October 2009 Get a FREE copy of Elektor magazine’s October issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR1009 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine November 2009 Get a FREE copy of Elektor magazine’s November issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR1109 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine December 2009 Get a FREE copy of Elektor magazine’s December issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR1209 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine January 2010 Get a FREE copy of Elektor magazine’s January issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0110 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine February 2010 Get a FREE copy of Elektor magazine’s February issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0210 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine March 2010 Get a FREE copy of Elektor magazine’s March issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0310 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine April 2010 Get a FREE copy of Elektor magazine’s April issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0410 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine May 2010 Get a FREE copy of Elektor magazine’s May issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0510 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine June 2010 Get a FREE copy of Elektor magazine’s June issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0610 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine July/August 2010 Get a FREE copy of Elektor magazine’s USA Special Projects Edition with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0810 into your shopping cart. The magazine will add 7.4 ounces to the package weight when calculating your shipping options.

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Free Elektor magazine September 2010 Get a FREE copy of Elektor magazine’s September issue with your order while supplies last. This offer is only available for orders shipped to USA or Canada. To get your free issue, enter the coupon code ELEKTOR0910 into your shopping cart. The magazine will add 5.6 ounces to the package weight when calculating your shipping options.