March 2021

Detailed description of this issue HERE

Projects & Circuits

Nutube Guitar Overdrive and Distortion Pedal – buy the PCB here!
Do you long for that true ‘valve sound’ in a guitar and distortion pedal? This one uses a unique low-voltage twin triode valve, so you know it’s the real deal!

Programmable Thermal Regulator – buy the PCB here!
This superb Arduino-based, flexible thermal regulator uses multiple temperature sensors and Peltier devices for 200W+ of active cooling and heating.

Tunable HF Preamplifier with Gain Control – buy the PCB here!
Here’s a simple tunable preamplifier which greatly improves SDR HF performance. It has (optional) gain control and can run off a 5V supply or phantom power.

Series, Features and Columns

The Fox Report by Barry Fox
Fakes, scams and evasion

Techno Talk by Mark Nelson
No blame, no shame?

Net Work by Alan Winstanley
This month, tech for WFH – working from home – especially the all-important webcam for the new normal of video conferencing.

PIC n’ Mix by Mike Hibbett
Part 4: PIC18F Development Board – buy the PCB HERE

Circuit Surgery by Ian Bell
Timing and metastability in synchronous circuits – Part 1

Make it with Micromite by Phil Boyce
Part 26: Having fun with a Micromite Plus

Practically Speaking by Jake Rothman
Restoring old equipment – Part 2

Max’s Cool Beans by Max The Magnificent
Flashing LEDs and drooling engineers – Part 13

Audio Out
Making a Transistor Radio – Part 1

Downloads

Download the files associated with this issue HERE.