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).


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.