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The SparkFun Inventor’s Kit has everything you need to construct a variety of circuits that will teach you how to use an Arduino Uno to read sensors, display information on an LCD, drive motors, and more. No previous programming or electronics experience is necessary, which makes this a great way for beginners to get started with embedded systems.

This flexible LED panel contains 256 RGB LEDs arranged in an 8×32 grid. The LEDs can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The panel runs on 5 V and can be chained with additional SK9822 LEDs.

This flexible LED panel contains 256 RGB LEDs arranged in a 16×16 grid. The LEDs can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The panel runs on 5 V and can be chained with additional SK9822 LEDs.

This flexible LED panel contains 64 RGB LEDs arranged in an 8×8 grid. The LEDs can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The panel runs on 5 V and can be chained with additional SK9822 LEDs.

This high-density LED strip has a length of 0.5 m and contains 72 RGB LEDs that can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The flexible, waterproof strip runs on 5 V and can be chained with additional SK9822 strips to form longer runs or cut apart between each LED for shorter sections.

This LED strip has a length of 2 m and contains 120 RGB LEDs that can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The flexible, waterproof strip runs on 5 V and can be chained with additional SK9822 strips to form longer runs or cut apart between each LED for shorter sections.

This LED strip has a length of 1 m and contains 60 RGB LEDs that can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The flexible, waterproof strip runs on 5 V and can be chained with additional APA102C strips to form longer runs or cut apart between each LED for shorter sections.

This LED strip has a length of 5 m and contains 150 RGB LEDs that can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The flexible, waterproof strip runs on 5 V and can be chained with additional SK9822 strips to form longer runs or cut apart between each LED for shorter sections.

This LED strip has a length of 2 m and contains 60 RGB LEDs that can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The flexible, waterproof strip runs on 5 V and can be chained with additional SK9822 strips to form longer runs or cut apart between each LED for shorter sections.

This LED strip has a length of 1 m and contains 30 RGB LEDs that can be individually addressed using an easy-to-control SPI interface, allowing you full control over the color of each RGB LED. The flexible, waterproof strip runs on 5 V and can be chained with additional SK9822 strips to form longer runs or cut apart between each LED for shorter sections.

This NEMA 17-size pancake bipolar stepping motor from Sanyo features an integrated high-resolution (1000 P/R) quadrature encoder that allows for 4000 counts per revolution of the output shaft when counting both edges of both channels. The stepper motor itself has a 1.8° step angle (200 steps/revolution) and each phase draws 1 A at 3.5 V, allowing for a holding torque of 0.85 kg-cm (12 oz-in).

This NEMA 17-size pancake bipolar stepping motor from Sanyo features an integrated high-resolution (1000 P/R) quadrature encoder that allows for 4000 counts per revolution of the output shaft when counting both edges of both channels. The stepper motor itself has a 1.8° step angle (200 steps/revolution) and each phase draws 1 A at 5.4 V, allowing for a holding torque of 1.9 kg-cm (26 oz-in).

Get a FREE copy of Circuit Cellar magazine’s April issue with your order while supplies last. To get your free issue, enter the coupon code CIRCUIT0417 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

This UL-listed 12 W, “wall wart”-style switching power adapter supplies up to 1 A at a regulated 12 VDC. The AC adapter works with input voltages of 100 – 240 VAC and has a 1.5 m (5 ft) DC power cord that is terminated by a center-positive, 5.5 × 2.1 mm barrel connector.

The FT1117 from FEETECH is a miniature-sized servo with the same output spline as standard servos, making it compatible with standard-sized servo horns, and the gear train is made primarily of metal gears. Servo horns and associated hardware are included.

Key specs at 6 V: 0.11 sec/60°, 50 oz-in (3.5 kg-cm), 20 g.

The RoboClaw motor controllers from Ion Motion Control (formerly Orion Robotics) can control a pair of brushed DC motors using USB serial, TTL serial, RC, or analog inputs. Integrated dual quadrature decoders make it easy to create a closed-loop speed control system. This version can supply a continuous 60 A per channel (120 A peak).

This UL-listed 12.6 W, “wall wart”-style switching power adapter supplies up to 2.4 A at a regulated 5.25 VDC. It is intended for use with 5V USB devices, and it has been specifically designed to supply 5.25 V instead of 5 V to help ensure that the device it is powering receives close to 5 V even when the current draw is high. The AC adapter works with input voltages of 100-240 VAC and has a 1.5-1.8 m (5-6 ft) DC power cord that is terminated by a USB micro-B connector.

The VM-CLAP1 Hand Clap Sensor from Verbal Machines is a low-power, microprocessor-based audio sensor that can detect hand claps or finger snaps while ignoring background noises such as human speech or music. It operates from 2.5 V to 5.5 V and offers a simple interface: when a clap or snap is detected, the output pin goes low for 40 ms, and the integrated blue LED lights up.

The FS5115M is a standard-size analog servo from FEETECH that has an all-metal gear train and delivers extra-high torque normally associated with much more expensive or larger servos. Servo horns and associated hardware are included.

Key specs at 6 V: 0.16 sec/60°, 215 oz-in (15.5 kg-cm), 58 g.

The FEETECH FT5335M servo is all about torque. This 1/4-scale digital servo can deliver an incredible 550 oz-in of torque at 7.4 V or 480 oz-in at 6 V thanks to its powerful motor and all-metal gear train. The FT5335M is a high-voltage servo, offering an operating voltage range of 6 V to 7.4 V. Servo horns and associated hardware are included.

Key specs at 7.4 V: 0.18 sec/60°, 550 oz-in (40 kg-cm), 180 g.

These hexagonal male-female aluminum standoffs are intended specifically for use with the Raspberry Pi. They keep parts spaced 11 mm apart, which is just the right height for mounting expansion boards with standard-size female headers, and they have 4mm-long M2.5 threads that are just the right size for the Raspberry Pi’s mounting holes. These standoffs are sold in packs of 4.

The S9V11F5 switching step-up/step-down regulator efficiently produces 5 V from input voltages between 2 V and 16 V. (Note: it requires an input voltage of at least 3 V to start, but it can operate down to 2 V after startup.) Its ability to convert both higher and lower input voltages makes it useful for applications where the power supply voltage can vary greatly, as with batteries that start above but discharge below 5 V. The very compact (0.3″ × 0.45″) module has a typical efficiency of over 90% and can supply a typical output current of up to 1.5 A when the input voltage is around 5 V.

This #4-40, pan-head screw is 3/4″ (0.75″) long. It is made from steel, is zinc-plated, and comes in packs of 25.

This #4-40, pan-head screw is 3/8″ (0.375″) long. It is made from steel, is zinc-plated, and comes in packs of 25.

This #2-56, pan-head screw is 3/4″ (0.75″) long. It is made from steel, is zinc-plated, and comes in packs of 25.

This #2-56, pan-head screw is 1/2″ (0.5″) long. It is made from steel, is zinc-plated, and comes in packs of 25.

This #2-56, pan-head screw is 3/8″ (0.375″) long. It is made from steel, is zinc-plated, and comes in packs of 25.

This M3, pan-head screw is 20 mm long. It is made from steel, is zinc-plated, and comes in packs of 25.

This M3, pan-head screw is 12 mm long. It is made from steel, is zinc-plated, and comes in packs of 25.

This M3, pan-head screw is 10 mm long. It is made from steel, is zinc-plated, and comes in packs of 25.

Get a FREE copy of Circuit Cellar magazine’s March issue with your order while supplies last. To get your free issue, enter the coupon code CIRCUIT0317 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

Build your very own programmable balancing robot with the Balboa 32U4 robot kit! The Balboa control board features an Arduino-compatible ATmega32U4 MCU, motor drivers, quadrature encoders, and a full IMU. This board also has the ability to interface with a Raspberry Pi, making the foundation for a complete Raspberry Pi-controlled balancing robot. Motors and wheels are not included: choose your wheels and motors to personalize your robot.

Get a FREE copy of Circuit Cellar magazine’s February issue with your order while supplies last. To get your free issue, enter the coupon code CIRCUIT0217 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

The Romi 32U4 Control Board turns the Romi chassis into a programmable robot based on the Arduino-compatible ATmega32U4 MCU. Its features include integrated dual motor drivers, a versatile power circuit, and inertial sensors, as well as connections for quadrature encoders and an optional LCD. The board also has the ability to interface with an added Raspberry Pi, making the foundation for a complete Raspberry Pi-controlled Romi robot.

The RoboClaw motor controllers from Ion Motion Control (formerly Orion Robotics) can control a pair of brushed DC motors using USB serial, TTL serial, RC, or analog inputs. Integrated dual quadrature decoders make it easy to create a closed-loop speed control system. This version can supply a continuous 45 A per channel (60 A peak) and has pin header I/O connections.

The RoboClaw motor controllers from Ion Motion Control (formerly Orion Robotics) can control a pair of brushed DC motors using USB serial, TTL serial, RC, or analog inputs. Integrated dual quadrature decoders make it easy to create a closed-loop speed control system. This version can supply a continuous 30 A per channel (60 A peak).

The RoboClaw motor controllers from Ion Motion Control (formerly Orion Robotics) can control a pair of brushed DC motors using USB serial, TTL serial, RC, or analog inputs. Integrated dual quadrature decoders make it easy to create a closed-loop speed control system. This version can supply a continuous 15 A per channel (30 A peak).

Get a FREE copy of Circuit Cellar magazine’s January issue with your order while supplies last. To get your free issue, enter the coupon code CIRCUIT0117 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

These magnetic discs can be used with our 20D mm metal gearmotors (extended motor shaft versions only) as part of a quadrature encoder system that offers 20 counts per revolution. Appropriate Hall Effect sensors, such as those in our magnetic encoder pair kit for 20D mm gearmotors, are required to complete the system. These discs are bulk-packaged and must be ordered in multiples of five. We will package these to order, and quantities shown in stock are limited to 10 units. We generally expect orders of up to a few hundred units to ship within a day.

These magnetic discs can be used with our mini plastic gearmotors (extended motor shaft versions only) as part of a quadrature encoder system that offers 12 counts per revolution. Appropriate Hall Effect sensors, such as those in our magnetic encoder pair kit for mini plastic gearmotors, are required to complete the system. These discs are bulk-packaged and must be ordered in multiples of five. We will package these to order, and quantities shown in stock are limited to 10 units. We generally expect orders of up to a few hundred units to ship within a day.

Add quadrature encoders to your 20D mm metal gearmotors (extended back shaft version required) with this kit that uses a magnetic disc and Hall effect sensors to provide 20 counts per revolution of the motor shaft. The sensors operate from 2.7 V to 18 V and provide digital outputs that can be connected directly to a microcontroller or other digital circuit. This module is compatible with all of the dual-shaft 20D mm metal gearmotors we carry.

These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor combined with a 488.3:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.

Key specs at 6 V: 30 RPM and 200 mA free-run, 170 oz-in (12 kg-cm) and 3.2 A stall.

These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor combined with a 312.5:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.

Key specs at 6 V: 45 RPM and 200 mA free-run, 150 oz-in (11 kg-cm) and 3.2 A stall.

These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor combined with a 156.3:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.

Key specs at 6 V: 90 RPM and 200 mA free-run, 110 oz-in (8 kg-cm) and 3.2 A stall.

These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor combined with a 100:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.

Key specs at 6 V: 140 RPM and 200 mA free-run, 90 oz-in (6.5 kg-cm) and 3.2 A stall.

These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor combined with a 62.5:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.

Key specs at 6 V: 225 RPM and 200 mA free-run, 60 oz-in (4.3 kg-cm) and 3.2 A stall.

These small brushed DC gearmotors can deliver a lot of power for their size. This version has a 6V brushed DC motor combined with a 25:1 metal spur gearbox. The gearmotor is cylindrical with a diameter of 20 mm, and the D-shaped output shaft is 4 mm in diameter and extends 18 mm from the face plate of the gearbox. This version also has a 6 × 2 mm extended motor shaft.

Key specs at 6 V: 560 RPM and 200 mA free-run, 30 oz-in (2.5 kg-cm) and 3.2 A stall.

The RoboClaw motor controllers from Ion Motion Control (formerly Orion Robotics) can control a pair of brushed DC motors using USB serial, TTL serial, RC, or analog inputs. Integrated dual quadrature decoders make it easy to create a closed-loop speed control system. This version can supply a continuous 7.5 A per channel (15 A peak).

Get a FREE copy of Circuit Cellar magazine’s December issue with your order while supplies last. To get your free issue, enter the coupon code CIRCUIT1216 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.

Get a FREE copy of Circuit Cellar magazine’s November issue with your order while supplies last. To get your free issue, enter the coupon code CIRCUIT1116 into your shopping cart. The magazine will add 6 ounces to the package weight when calculating your shipping options.