March 2022

Detailed description of this issue HERE

Projects & Circuits

Mini Isolated Serial Link – buy the PCB HERE
This tiny module provides bidirectional, isolated, full-duplex serial communication. Ideal when two (or more) boards on separate supplies need to talk to each other.

Busy Loo Warning! – buy the PCB HERE
OK, it’s a bit tongue-in-cheek… but it could have other, more serious uses. The Busy Loo Warning flashes a bright LED light when you don’t want someone barging in!

Battery Monitor Logger – Part 2
In Part 1 we described our new Battery Logger. Now we’ll go over the construction, testing, setup and calibration procedures so you can build and use it.

Electronic Wind Chimes – Part 2
Last month, we described how our new Electronic Wind Chime worked. Now we modify the wind chime itself so it can be driven by a series of solenoids.

Geekcreit LCR-T4 Mini Digital Multi-Tester
This compact digital tester will identify, check and analyse BJTs, JFETs, MOSFETs, diodes, LEDs, thyristors, resistors, capacitors and inductors – all for under a tenner!

Downloads

Download the files associated with this issue HERE.