Mini 9v Christmas Tree

tree frontA low-cost kit, this is a simple Christmas Tree with 3 LEDs and two resistors powered by a 9v PP3 battery. The markings on the back of the PCB make it particularly easy to get the orientation of the LEDs correct and there’s scope for a number of measurments using a multimeter, if you want a bit of theory.


Nellie the nine-volt robot


Our cheapest kit! As the name suggests, Nellie runs from a 9v PP3 battery and, as well as being affordable and easy to solder, she can be used to show a bit of electronics theory, if you wish! Also available in an ultra low-cost version (shown here).



Eric the easy-to-solder robot

Eric front Eric back

Eric is a great kit for soldering workshops because he’s powered by a coin cell which is sufficiently low-cost that you can afford to send your new solderers away with a completed kit and battery all for not much cash! Supplied with rainbow/colour-changing LEDs and a lanyard (not shown here).

Mini GPIO kit for Raspberry Pi

mini gpioThis is a simple add-on board for the Raspberry Pi with three LEDs and a push-button switch. A sample bit of Python code is included to flash the LEDs in response to the switch being pressed but you can easily write your own code based on the numerous examples that a web search will give you. Also, there’s the option to add a low-cost DHT11 temperature/humidity sensor to build a simple datalogger. Note: although a slide switch is shown in the board on the right, this kit actually only works with a push button (shown on the left).


Two-transistor astable / flashing LEDs

transistor astable

This is a classic circuit using capacitors, resistors and transistors to alternately flash two LEDs. Could be used to make a warning sign or as the basis of other oscillator-based projects (such as a miniature electronics organ). Runs from a 9v PP3 battery.


CLAS LED/switches kit for Raspberry Pi

assembly2Are you looking for instructions and code for the CLAS LED/switches kit (below) for the Rasberry Pi B+? Sadly I’m no longer producing this kit, but click the link above for more information on how to build and use it.



By the way, all of our PCBs are made by the wonderful Ragworm. Do pay their website a visit and consider using them if you ever fancy making your own circuit boards!