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Parallax Boe-Bot Robot Kit - USB

Posted by Ryan on 12 October 2017
Tags: new products

We are now carrying the Parallax Boe-Bot Robot Kit - USB, which incorporates a USB-to-serial adapter into the board, so it does not require a separate serial adapter.

The Boe-Bot Robot Kit is an educational kit complete with parts and a textbook for building and programming your own robot. No previous robotics, electronics, or programming experience is required; the kit does not require soldering.

Free Circuit Cellar magazine October 2017

Posted by Ben on 2 October 2017
Tags: new products

Get a FREE copy of Circuit Cellar magazine’s October 2017 issue issue with your order, while supplies last. To get your free issue, enter the coupon code CIRCUIT1017 to your shopping cart, or click the link. The magazine will add 6 ounces to your order weight when calculating your shipping options.

For back issues and more information, see our free Circuit Cellar magazine offers.

1″ (2.5 cm) and 2″ (5 cm) premium jumper wires and wires with pre-crimped terminals

Posted by Ben on 27 September 2017
Tags: new products

Premium Jumper Wire 60-Piece 6-Color Assortment M-F 2".

Wires with Pre-crimped Terminals 60-Piece 6-Color Assortment M-F 2".

Our popular premium jumper wires and wires with pre-crimped terminals are a convenient way to make quick, neat connections to 0.1″ (2.54 mm) connectors and solderless breadboards, and they are now available in shorter 1″ and 2″ lengths. Each new length is available in three gender combinations (female-female, male-female, and male-male) and seven color combinations:

  • black 10-pack
  • red 10-pack
  • yellow 10-pack
  • green 10-pack
  • blue 10-pack
  • white 10-pack
  • multi-color 60-pack (10 each of all six colors)

Our wires with pre-crimped terminals work with our 0.1″ crimp connector housings to make custom cables with the pin arrangement of your choosing. You can easily make cable harnesses or assemblies that branch from one connector on one side to multiple connectors on the other, and you can also cut off one pre-crimped end and solder the wires directly to components to make swapping connections easy:

The premium jumper wires are just wires with pre-crimped terminals that have 1×1 crimp connector housings already installed over the crimp pins.

You can use the following selection boxes to get to a specific pack of premium jumper wires:

Select options:

and you can use the following selection boxes to get to a specific pack of wires with pre-crimped terminals:

Select options:

New track sets and colorful Zumo sprockets

Posted by Ben on 22 September 2017
Tags: new products

Pololu 22T Track Set – Red.

We have replaced our original Pololu track sets with new versions featuring our newer style of spoked Zumo sprockets. The sprockets are available in three colors, and like our original sets, we have two different track lengths to choose from:

Each track is made of a single piece of flexible silicone, and the drive sprockets are designed to work with 3mm D-shafts, such as those on our micro metal gearmotors and most of our mini plastic gearmotors.

Dimensions of the Pololu 22T track set.

Dimensions of the Pololu 30T track set.

Additionally, we are offering sprockets by themselves (without tracks or fasteners) for use as replacements for the black sprockets included with our Zumo robots: you can use the red sprockets to add a splash of color, and you can use the white sprockets for painting (or just leave them white!).

Zumo 32U4 robot with red sprockets.

Zumo 32U4 robot with white sprockets.

Introducing the Tic T825 USB Multi-Interface Stepper Motor Controller

Posted by David on 20 July 2017
Tags: new products

I am excited to announce our new product, the Tic T825 USB Multi-Interface Stepper Motor Controller. The Tic makes basic speed or position control of a stepper motor easy, with support for six high-level control interfaces:

  • USB for direct connection to a computer
  • TTL serial operating at 5 V for use with a microcontroller
  • I²C for use with a microcontroller
  • RC hobby servo pulses for use in an RC system
  • Analog voltage for use with a potentiometer or analog joystick
  • Quadrature encoder input for use with a rotary encoder dial, allowing full rotation without limits (not for position feedback)

You can select which of these interfaces you want to use and configure the other settings of the Tic over USB using our free software.

The Status tab of the Pololu Tic Control Center.

The Input and Motor Settings tab of the Pololu Tic Control Center.

The Tic T825 can operate from 8.5 V to 45 V and deliver up to approximately 1.5 A per phase continuously without a heat sink or forced air flow. With a digitally adjustable current limit that can be set over USB, serial, or I²C, you can save power while holding position or increase the motor’s torque while it is moving. The Tic offers six different step resolutions, from full step through 1/32-step (32 microsteps per full step). We designed the Tic’s firmware to be capable of taking up to 50,000 microsteps per second, which lets you use those finer microstepping modes while still keeping a high motor speed. The Tic also supports acceleration and deceleration limiting for smooth movements, and very slow speeds down to 1 step every 200 seconds (or 1 step every 1428 seconds with reduced resolution). The Tic T825 is based on the DRV8825 stepper motor driver IC from Texas Instruments (for which we also have a basic carrier board), and we plan to make other versions of the Tic that are based on different drivers with different performance characteristics.

Tic T825 USB Multi-Interface Stepper Motor Controller, bottom view with dimensions.

The Tic T825 is available with connectors soldered in or without connectors soldered in.

For RC/hobby servos, we have a similar family of products called the Maestro servo controllers. For brushed DC motors, we offer the Simple Motor Controllers and the Jrk Motor Controllers.

New SK9822 LED strips and panels

Posted by David on 16 May 2017
Tags: new products

We’re excited to offer a series of addressable LED strips and addressable LED panels based on the new SK9822 integrated circuit. Like the APA102C, the SK9822 combines an RGB LED and driver into a single 5050-size package, allowing each pixel to be individually controlled using a simple two-wire SPI protocol.

The SK9822 is almost (see the notes below) a drop-in replacement for the APA102C and is better than it in a few ways, most importantly its built-in constant current control. If you’ve ever tried to power a long chain of LED strips and only connected power at one end, you might have noticed that the far end of the LED strip has a lower voltage across its power rails because of resistance in the long power connections. For LED strips based on the APA102C and WS2812B, the lower voltage makes the light dimmer and redder. With the SK9822, voltage drops like that are less likely to have a visible effect as long as the voltage stays above 3.5 V.

The SK9822’s protocol is very similar to that of the APA102C, but it updates the color that is being shown at a different time. If you replace APA102C LEDs with SK9822 LEDs in a low frame-rate application, you might have to update the code you are using to control the LEDs. The latest version of our APA102 Arduino library works with the SK9822 so you can either use it directly or use it as a reference when writing your own code. The colors generated by the SK9822 look different from the colors generated by the APA102C, so we would not recommend mixing the APA102C and the SK9822 in a single project.

We offer six different kinds of SK9822 LED strip with different LED densities and lengths:

We offer SK9822 LED panels in three different sizes:

These new SK9822-based products will replace our older APA102C-based products.

We continue to offer SK6812-based LED strips which also have constant current control but are controlled with a one-wire protocol.

Close up of an SK9822, with the red, green, and blue LEDs on at a low brightness.

An addressable RGB LED strip (APA102C or SK9822) displaying a rainbow animation.

Sanyo pancake stepper motors with encoders

Posted by Ryan on 12 May 2017
Tags: new products

We are now offering two new NEMA 17-size pancake bipolar stepper motors from Sanyo, each featuring an integrated high-resolution quadrature encoder and home channel for absolute positioning.

Stepper motor Steps per revolution Current rating (per coil) Voltage rating Resistance (per coil) Holding torque
#2279 42×31.5mm 200 1 A 5.4 V 5.4 Ω 1.9 kg-cm (26 oz-in)
#2278 42×24.5mm 200 1 A 3.5 V 3.5 Ω 800 g-cm (12 oz-in)

Side view of the SS2422-50XE100 42×31.5mm Sanyo pancake stepper motor.

Side view of the SS2421-50XE100 42×24.5mm Sanyo pancake stepper motor.

The integrated quadrature encoder operates from 5 V and has a resolution of 1000 P/R, which allows for 4000 counts per revolution (CPR) of the output shaft when counting both edges (i.e. rising and falling) of both channels (i.e. A and B). In addition to the A and B channel outputs, the encoder has a home channel, Z, that pulses once per revolution and can be used for absolute positioning. The encoder also has outputs for the inverse of A, B, and Z. A 15 cm (6″) encoder cable is included.

New 12V 1A wall power adapter

Posted by Ryan on 12 May 2017
Tags: new products

We’ve replaced our original 12 V 1 A wall power adapter with a lighter, smaller version. 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 to 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.

Free Circuit Cellar magazine April 2017

Posted by Ben on 10 May 2017
Tags: new products

Get a FREE copy of Circuit Cellar magazine’s April 2017 issue issue with your order, while supplies last. To get your free issue, enter the coupon code CIRCUIT0417 to your shopping cart, or click the link. The magazine will add 6 ounces to your order weight when calculating your shipping options.

For back issues and more information, see our free Circuit Cellar magazine offers.

FEETECH Mini Servo FT1117M

Posted by Ryan on 4 May 2017
Tags: new products

We added the FEETECH Mini Servo FT1117M to our expanding RC servo selection.This miniature-sized servo has a stall torque of 50 oz-in (3.5 kg-cm) and a speed of 0.11 sec/60° at 6 V. The pinion gear is plastic, but the rest of the gear train consists of all metal gears, allowing this servo to deliver the kind of speed and torque typically associated with larger servos.

Comparison to the Power HD 1711MG mini servo

This servo is a lower-cost alternative to the 1711MG from Power HD, which has nearly identical dimensions and performance. The two servos should be generally interchangeable for most applications. The picture below shows both the FT1117M and the 1711MG side by side:

Expect more new FEETECH servos in the coming weeks!

New Products

XYZrobot 6 DOF Robotic Arm Kit
Premium Jumper Wire 60-Piece 6-Color Assortment M-M 1"
Parallax Boe-Bot Robot Kit - USB (with USB A to Mini-B cable) #28832
Wires with Pre-Crimped Terminals 60-Piece 6-Color Assortment F-F 2"
Wires with Pre-Crimped Terminals 60-Piece 6-Color Assortment M-M 1"
156:1 Metal Gearmotor 20Dx44L mm 6V CB
Pololu 22T Track Set - Black
Wires with Pre-Crimped Terminals 60-Piece 6-Color Assortment M-F 1"
Wires with Pre-Crimped Terminals 60-Piece 6-Color Assortment M-F 2"
Pololu 30T Track Set - Black
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