Magic Mote MSP430G2553 Wireless Sensor Node With NRF24L01+ Module

Proto Cape For BeagleBone

This add-on board for the BeagleBone or BeagleBone Black allows easy prototyping using through-hole components. More than 300 sold on Tindie!

Daisy Chainable I2C Splitter PCB

One of a series of modular expansion boards for the I2C bus: a 1-3 splitter for branching I2C signals.

Valentine LED Chaser

The object of your desire will not be able to resist this heart shaped kitsch-o-tron, lovingly hand-crafted on perfboard with a CD4017B decade counter and 555 astable. But you probably can't go wrong with flowers and chocolates as well. Just to be on the safe side. Kits now available from Tindie!

Magic Mote Thermostat and Wireless Temperature Sensor

A homemade thermostat up in the basement rafters controls the heating in my home. The smart bit is the radio frequency communication that connects it to a remote temperature sensor.

Magic Mote Wireless Sensor Node

This compact PCB interfaces a low power MSP430G2553 microcontroller with a Nordic NRF24L01+ 2.4 GHz radio frequency transceiver module. It's well adapted to serve as a wireless sensor node, but has enough I/O options to be put to use wherever a small microcontroller is required. PCBs now available from Tindie!

12mm Rotary Encoder Breakout

0.925" x 0.925" breakout board for 12mm rotary encoder with switch. The PCB has enlarged holes to fit generic encoders.

Twin Triac AC Switch on DP5050 PCB

Two triacs switched by zero-crossing optocoupled drivers act as solid state relays on a Dangerous Prototypes standard size PCB.

Twin Relay Control Board on DP5050 PCB

Just for good measure, a breakout board for twin Songle SRD series relays to fit the Dangerous Prototypes standard PCB size DP5050.

Relay Control Board on DP5031 PCB

Here's a breakout board for those Songle SRD series relays that are so cheap on Ebay. It fits nicely on the Dangerous Prototypes standard PCB size DP5031.

Stripboard PID Arduino Shield, Part 1: Hardware

This easy-to-make shield converts your Arduino into a full-featured PID controller.

Jack-O'-Launchpad

Perhaps not the most imaginative used of a Tiva Launchpad, but the default application makes for a serviceable Jack-O'-Lantern. Powered by a USB adapter from CUI, a freebie via @digikey on twitter. Nice!

Stripboard I2C Logic Level Converter

A very easy logic level converter to translate I2C signals from, say, a 5 V Arduino to a 3.3 V slave device.

I2C LED Display From Hacked Voltmeter

LED voltmeters are a cheap source of 7 segment displays and can easily be repurposed. Using the I2C protocol, a master microcontroller such as an Arduino Uno can govern multiple displays with just 2 I/O pins.

Easy Benchtop Power Supply

Converting an ATX power supply is a great way to get juice to your electronics projects. With the ATX breakout board from Dangerous Prototypes you can do it while waiting for your toast to pop up, and it looks pretty good too.

DIY PCBs By Stovetop Toner Transfer

If the clothes iron method fails for you, try this new twist on the toner transfer process. Put a heavy hotplate on the stove and dial in a temperature of 175 °C using a thermocouple. Bond the toner image to the copper clad board by placing them print side down onto the hotplate between two sheets of paper and applying pressure with a rolling pin for 2-5 minutes. For double sided boards, flip every 30 seconds or so.

Magic Mouth: Arduino Speech Shield

Ready to talk the talk? Give your Arduino the power of speech. This easy-to-build circuit includes a voice synthesizer and amplifier.

October Swag Bag: Web Platform

Dangerous Prototypes sent me a web server from their "Scratch and Dent" drawer. The circuit board was small enough to fit in the palm of my hand — but just how dinged was it, and could I get it working?

Bug Shaped Solar Robot

Powered by a solar panel, this miniature robot shuffles towards the light.

Animated LCD Name Tag

While we are on the subject of calculators, this one has been ever so slightly -- what is the word? -- doctored for use as an animated name plate. The perfect desk toy for a nutty scientist.