New Products!

We have two exciting new products we'd like to tell you about. We introduced both of these for World MakerFaire New York

Current/Voltage Monitor

We've created a tiny current and voltage monitor for monitoring power flow. Despite its small size, it can measure currents up to 30A, both unipolar and bipolar. The broad traces, Hall effect current sensing element, and the ability to connect ring terminals as large as #10 minimizes the insertion loss from adding this monitor to your circuit. It's thin enough to fit inside a piece of 1/2 conduit, and still has two more mechanical tricks as well. The main contacts are 1-1/8" apart, which allows you (with standoffs) to bolt the monitor across the contacts of a standard 3/8 barrier terminal strip. There is also a cut line of holes on each side, allowing the board to be trimmed for easy installation into a standard breadboard.

Electrically, the board outputs two analog voltages. The first first, labeled Isense, is proportional to the current flowing across the board. The Vsense voltage is the voltage between the main conductor and the provided signal ground. The Vsense output is diode clamped to a value between signal ground and the 5V power rail for the current sensor.

We're currently stocking four different current ranges and two voltage ranges, all for $15/ea. If none of these meet your requirements, send us an email at and we'll be happy to assist you.

RGB LED Matrix Backpack

We're particularly proud of the second product we've just introduced, the RGB LED Matrix Backpack. It abstracts the multiplexing and driving operations required to drive one of our 60 mm 8x8 RGB LED Matrix displays and gives the user a simple-to-use I2C interface. An HT1632C does the heavy lifting of driving the matrix while an ATtiny2313 provides the I2C interface. Just transmit the desired pattern as a 24 byte string and the backpack displays it on the included LED matrix until you remove power or send a different pattern. 

We decided to duplicate our earlier blinkenlights demo (Part 1, Part 2) with the new backpack. We edge-taped four of them into an array, hooked up an Arduino, and displayed the same three games of life we did before. You can compare the size and complexity of the code for the original demo with that for the new demo we were showing of at World MakerFaire. We'll get a blog post up analyzing this demo in the next week or so.

The kit comes with everything in the picture above for $30.