October 2020

Detailed description of this issue HERE

Projects & Circuits

High-Power 45V/8A Variable Linear Supply – Part 1
This adjustable bench supply can deliver heaps of power, up to 360w in total, making it ideal for the test bench or just general-purpose use.

Arduino-based Digital Audio Millivoltmeter – buy the PCB here!
Plug-in module with the powerful 28-pin Micromite plus a USB socket for comms and programming – all you need to start with the Micromite in one handy package.

Precision ‘Audio’ Signal Amplifier – buy the PCB here!
Set up and calibrate audio systems with this low-cost, easy-to-build, highly accurate design. Based on the popular Arduino, it’s an essential piece of test equipment!

Series, Features and Columns

The Fox Report by Barry Fox
More lessons from lockdown

Techno Talk by Mark Nelson
Now is the autumn of our discontent…

Net Work by Alan Winstanley

This month, a spookily accurate prediction of tech use from the 1940s, updates on
ransomware, plans for visiting the Red Planet and the launch of microsatellites.

Pedal Power Station! – Part 1 by Julian Edgar

This project generates real power, keeps you fit and best of all, you can have fun
building it from scrap and salvaged parts at low cost!

Circuit Surgery
Rail-to-rail and single-supply op amps

Make it with Micromite
Part 21: Exploring a GPS module with UART communication

Max’s Cool Beans by Max The Magnificent

Flashing LEDs and drooling engineers – Part 8

Practically Speaking

Introducing the K40 laser cutter and engraver

Audio Out

Low-noise germanium transistor power supply – buy the PCB here and the transformer here!

Downloads

Download the files associated with this issue HERE.