We’re excited to offer a series of APA102C-based addressable RGB LED strips to complement our existing WS2812B-based LED strips. Like the WS2812 strips, the new strips have connectors on both ends to make chaining easy, and they are available in the same six combinations of LED densities and lengths:

• 1 meter, 30 LEDs (30 LEDs/m)
• 2 meters, 60 LEDs (30 LEDs/m)
• 5 meters, 150 LEDs (30 LEDs/m)
• 1 meter, 60 LEDs (60 LEDs/m)
• 2 meters, 120 LEDs (60 LEDs/m)
• 0.5 meters, 72 LEDs (144 LEDs/m)

Like the WS2812B, the APA102C combines an RGB LED and driver into a single 5050-size package, allowing them to be packed as densely as 144 LEDs per meter, and each pixel can be individually addressed to give you full control over the color of each RGB LED. However, while the WS2812B uses a high-speed one-wire control interface with strict timing requirements, the APA102C has a standard SPI interface, with separate data and clock signals, that lets it work with a wide range of communication rates, making it much easier to control.

For example, it isn’t easy for a Raspberry Pi to generate a control signal with the exact timings that the WS281x requires. However, an APA102 only reads its data signal on the rising edge of its clock signal, and the Raspberry Pi controls both signals, meaning it is free to bit-bang data to the LEDs as slowly (or quickly) and as irregularly as it wants. Alternatively, it’s straightforward to use the SoC’s built-in SPI peripheral to drive APA102 LEDs. Of course, both the bit-banging and hardware SPI approaches can also be used on many other devices, including A-Stars and Arduinos.

Close up of one segment of an APA102C-based LED strip, with the red, green, and blue LEDs on at a low brightness.

The APA102C also offers a few other improvements over the WS2812B, including a color-independent brightness control that lets you easily adjust the intensity of each LED without changing its color. Also, the color channels on an APA102C are pulse-width modulated (PWM) at a much higher frequency, making it less susceptible to flickering on camera and more suited to persistence-of-vision (POV) applications.

For more information about our APA102C-based LED strips, see their product pages.

To wrap up this round of distributor introductions, I would like to welcome the following new Pololu distributors in Asia:

NTREX, Inc. – Devicemart is an online electronics store in Incheon, South Korea, with a huge selection of components, prototyping equipment, robotics kits, 3D printers, PC components, and industrial supplies. We are excited to see that their Pololu category now lists hundreds of our parts. Devicemart is now our fourth Korean distributor.

Suzaku Lab, Ltd. is an online store based in Nara, Japan, specializing in robotics parts. Joining two other Japanese distributors, Suzaku is carrying an extensive selection of Pololu motion control boards, including the Jrk, Simple Motor Controller, and TReX lines as well as most of our stepper and DC motor driver breakout boards.

Coprime Pte Ltd, an electronics shop in Singapore, is now carrying Pololu products. We have not visited, but from the Facebook pictures of their storefront, it seems like Pololu parts are being displayed alongside an exciting array of other hobby electronics boards and parts. Coprime is our fourth Singaporean distributor and our second (!) located in Sim Lim Tower.

Explore Labs is an open-source electronics company in Jodhpur, India that has been writing tutorials and selling and designing boards since around 2011 (they are growing and recently rebuilt their website, so some old content is unavailable). They publish their hardware designs on GitHub and sell them on their site along with Arduino, Raspberry Pi, the Intel Edison, kits from 3D Robotics, and now Pololu parts.

Tanna Educational Services, another new Indian distributor in Rajkot, Gujarat, offers training services on topics including embedded development and also sells microcontroller-related boards, kits, and components on their website. Their Pololu category contains various regulators and motor drivers, several sensors, the Wixel, our USB AVR Programmer, and more. Tanna and Explore Labs bring us to a total of five Indian distributors.

See the full list of over 200 distributors to find one in your area.

In celebration of Independence Day (July 4th), we are putting our entire catalog on sale at 10% to 25% off through the end of Monday, July 6. Note that we will be closed tomorrow, so orders will not ship until Monday, July 6.

For more information, including all the discount coupon codes, see the sale page.

Happy 4th of July!

We’re now selling the latest V5 versions of the RoboClaw 2x5A, 2x15A, and 2x30A dual motor controllers from Ion Motion Control. Like the previous V4 RoboClaws, they can drive a pair of brushed DC motors at voltages from 6 V to 34 V, but the 2x5A now has a USB serial interface (in addition to TTL serial, RC, and analog inputs) like its larger siblings, and the 2x15A and 2x30A have a new heat sink design that should improve cooling. We expect to have updated documentation for the new versions soon.

RoboClaw 2×7A or 2×5A dual motor controller (V5).

RoboClaw 2×15A, 2×30A, or 2×45A dual motor controller (V5).

We are excited about our new 0.1″ terminal blocks because they can typically be soldered to PCBs in place of standard 0.1″ male and female headers, offering alternative board-to-wire connection options that can be especially convenient in cases where you know you will be dealing with stripped, unterminated wires. For example, the following picture shows an 8-pin terminal block spanning the control connections of a VNH5019 motor driver carrier:

There are some low components (e.g. resistors and capacitors) near the motor driver’s 0.1″ holes, but the terminal block is able to comfortably sit on top of them. In cases where there is not sufficient clearance from tall, nearby components, it might be possible to use the terminal blocks on the bottom side of the PCB. The following picture is an example of this, with a 4-pin terminal block used for the motor and motor power connections of a DRV8801 motor driver carrier:

And in case these pictures are giving the illusion of large PCBs rather than tiny terminal blocks, we have for your viewing pleasure a picture of these terminal blocks in a 0.1″ prototyping board (Adafruit’s Perma-Proto prototyping PCB) next to some standard 0.1″ male header pins:

These terminal blocks cannot be combined into longer strips or placed side-by-side on a 0.1″ grid, so you will need to get the exact lengths required by your application. Fortunately, we have nine lengths to choose from, from two pins through ten pins!

We now have a shorter (20 mm) 12 mm Hex Wheel Adapter for 6 mm Shaft as an alternative to our original 35 mm extended version. These adapters work well with our 37D mm metal gearmotors, allowing you to use them with many common hobby RC wheels.

12mm Hex Wheel Adapter for 6mm Shaft connecting a Wild Thumper Wheel to a 37D mm Metal Gearmotor.

For our full selection of these adapters, see our hex wheel adapter category.

We have two exciting new DC motor driver carriers to introduce, one for ROHM’s BD65496MUV and one for Maxim’s MAX14870:

BD65496MUV Single Brushed DC Motor Driver Carrier, labeled top view.

MAX14870 Single Brushed DC Motor Driver Carrier, labeled top view.

These drivers each offer wide operating voltage ranges, with the BD65496MUV operating from as low as 2 V up to 16 V and the MAX14870 operating from 4.5 V all the way up to 36 V. They can each supply over an amp to a single, bidirectional brushed DC motor. These are the highest-performing integrated motor drivers we know of short of substantially larger units such as the MC33926 and VNH5019. For more information on these drivers, click on the related products below:

Most electronics projects (and many Pololu products) require soldering. That’s why we’re excited to offer a soldering station and other accessories that we can wholeheartedly recommend! We are now carrying Hakko soldering and desoldering tools and Hakko hand tools (cutters and pliers). We use Hakko tools in our own manufacturing, and we believe they offer a great mix of reliability, performance, and price. Continued…

Continuing with our belated new distributor introductions, we are happy to welcome these six new Pololu distributors in South America:

Baú da Eletrônica is a new Pololu distributor in São Paulo, Brazil. Check out their Pololu category for the 3pi Robot, Zumo, and more.

BUILDBOT, also in São Paulo, is now carrying the 3pi and Zumo as well as a variety of Pololu sensors, relay modules, and mechanical parts.

FILIPEFLOP is yet another new distributor in Brazil (bringing the total to eight), located in the city of Florianópolis. Make sure to check out their blog, which is full of useful-looking tutorials.

IMPORTRONIC, a robotics and electronics store in Quito, Ecuador, now features a Pololu category with a selection of our popular motors and servos.

Paruro.pe, in Lima, Peru, carries a large selection of electronics parts. Search for Pololu on their site to find our 3pi and Zumo, Arduino and Raspberry motor drivers, the Arduino-compatible A-Star Mini, and more.

Eneka is a new distributor with an interesting history. The store was founded by four brothers as a radio assembler/installer in Paris, France, and moved to Montevideo, Uruguay, in 1936 due to the deteriorating situation in Europe. Since then, they have become a distributor of electronics equipment and components, and they recently started adding robotics to their product line. Our first distributor in Uruguay, Eneka carries a number of Pololu parts including voltage regulators, sensors, motors, and wheels.

See the full list of over 200 distributors to find one in your area.

A contact at Mexican distributor Cosas de Ingeniería wrote to let us know about a contest he is helping organize in Juriquilla, Querétaro, Mexico. The Mexican Mechatronics Asociation (Asociación Mexicana de Mecatronica A.C.) will be hosting the 14th National Congress of Mechatronics (14º Congreso Nacional de Mecatrónica) 2nd Robotics Competition on October 15th through 17th this year. The three-day event will host several robotic competitions:

• Autonomous Vehicle Competition (based on the Sparkfun Autonomous Vehicle Competition)
• Insect Robot Race (insectoid robots try to be the first to travel 2 m over obstacles and uneven surfaces)
• Mini-Sumo Competition (autonomous robots, similar to the one pictured above and our Zumo robots, fight to stay in a designated area)
• Line Following Competition (autonomous robots follow a line-marked course as quickly as they can)

To keep up with the latest news about this competition, see the RoboticaAMM Facebook page, which also has dozens of pictures from the last competition.