November 2020

Detailed description of this issue HERE

Projects & Circuits

The Christmas Tree that grows! – see our PCB special offer here!
Build our superb scalable LED Christmas tree – you can make it as modest or impressive as you like!

USB Digital and SPI Interface Board – buy the PCB here!
A very handy general-purpose controller which can handle up to eight digital lines from your PC, including an SPI serial interface.

High-Power 45V/8A Variable Linear Supply – Part 2 – buy the PCB here!
This month, we start construction of our powerful PSU, based around a 500VA toroidal transformer and four power transistors.

Five-way LCD Panel Meter / USB Display – buy the PCB here!
A simple device to replace multiple panel meters. It can also be used as a small additional text screen for a PC, Raspberry Pi or any other computer with USB.

Series, Features and Columns

The Fox Report by Barry Fox
Choosing your monitor – curved or flat?

Techno Talk by Mark Nelson
Every little helps.

Net Work by Alan Winstanley

In an extended issue of Net Work, we look at the vitally important issue of trust in online purchases and reviews..

Pedal Power Station! – Part 2 by Julian Edgar

Last month, we developed the mechanical section; now it’s time to use electronics to add instruments and condition the power output.

Circuit Surgery
Analogue multipliers

Make it with Micromite
Part 22: A modern-style analogue GPS clock

Max’s Cool Beans by Max The Magnificent

Flashing LEDs and drooling engineers – Part 9

Practically Speaking

Restoring old equipment – Part 1

Audio Out

Theremin Audio Amplifier – Part 1 – buy the PCB here!

Downloads

Download the files associated with this issue HERE.