May 2022

Projects & Circuits

64-key MIDI Matrix – Part 1 – buy the TWO PCBs HERE and HERE
In the last issue we described low-cost hardware that you can build to work with MIDI, including a comprehensive MIDI Encoder Shield and a MIDI Key Matrix to drive it. We have developed some more software to make even better use of this hardware, and we’ll show you how you can even use it with Android smartphones and tablets.

Digital FX Unit – Part 1 – buy the TWO PCB options HERE (BCD) and HERE (pot)
Our new Digial FX Unit, introduced last month, can produce 15 different effects for musicians or recording technicians to customise their instruments and sounds. You can customise eight of those effects – and this article describes how to create and install different effects patches into the unit’s EEPROM.

High-current Battery Balancer – Part 1 – buy the HERE
Introduced last month, our new High-current Battery Balancer is an advanced design which provides high efficiency and fast balancing by efficiently transferring charge between connected cells or batteries. It can handle cells or batteries up to 16V, and two units can be combined for larger installations. This second and final article describes the assembly and testing steps, and how to use it.

Series, Features and Columns

Techno Talk by Mark Nelson
From nano to bio

Net Work by Alan Winstanley
This month’s Net Work, brings you a round-up of topical technological issues and trends from the UK and around the world.

KickStart by Mike Tooley
Part 8: Introducing the Raspberry Pi Pico

Wind turbine for your garden by Julian Edgar
Relatively low in cost and well-made, this turbine is ideal for experimenting with wind power.

Circuit Surgery by Ian Bell
Royer oscillators

Max’s Cool Beans by Max The Magnificent
Flashing LEDs and drooling engineers – Part 27

Audio Out – buy the PCBs HERE
Analogue Vocoder – Part 7: Assembly and testing

Electronic Building Blocks
Electronic Stethoscope for Machinery

Downloads

Download the files associated with this issue HERE