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 Level Shifter

An improved I2C level shifter PCB compatible with the daisy chainable I2C splitter.

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.

$1 Lithium Coin Cell Charger

Got a buck? Make a charger for LiR2032 coin cells. It could hardly be cheaper or easier.

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.

Homemade MSP430 Launchpads

When I ordered some NRF24L01+ boosterpacks from the 43oh store, I asked for a couple of MSP430 Launchpad v1.4 PCBs. These are legacy boards kindly provided by TI (thanks LariSan!) It was fiddly soldering to the tiny 0402 pads since my components were all 0805. The LEDs were especially tricky. But they both turned out OK as you can see. Here they are (alongside a genuine Launchpad on the left) running the breathing LED demo from the OSX Launchpad toolchain.

A Little Something To Be Thankful For

Thanks Elecrow for a $10 voucher in their Black Friday giveaway. I have heard good reports about their PCB prototyping service, especially the free color option, and I am keen to give it a try.

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 4: Thermocouple Interface

The diagram shows how to connect an Adafruit MAX31855 breakout board to the stripboard Arduino PID shield. Vin should connect to the 5V pin and DO, CS, and CLK to A0, A1, and A2 respectively. Connect a K thermocouple in the screw terminals. If the temperature reading goes down when it should go up, switch the thermocouple wires around.

Stripboard PID Arduino Shield, Part 3: Serial Interface

The graphical user interface allows every feature of the Arduino PID controller shield to be governed remotely via the serial interface. A powerful additional feature is the ability to set multi-stage temperature profiles for applications where the set point changes over time.

Stripboard PID Arduino Shield, Part 2: Firmware

Install the code base for the stripboard Arduino PID shield and get started using it as a standalone temperature controller.

Stripboard PID Arduino Shield, Part 1: Hardware

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

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.

@YT2095 Magic Mouth v1.0 Build

Yours Truly (@YT2095) is putting together a Magic Mouth v1.0 speech synthesis shield for his Saturday morning project! Just for fun, I sent him one the PCBs I had got back from Seeedstudio's FusionPCB service. He's substituted a potentiometer for the thumbwheel trimmer, and it looks like one last header and the jack socket still need to make it onto the board. It's looking good, John. :)