August 2021

Detailed description of this issue HERE

Projects & Circuits

Ol’ Timer II – buy the PCB HERE.
Time on your mobile phone is probably accurate to a miniscule fraction of a second, but if you’re yearning for a more relaxed attitude to time, this project is for you!

Low-cost, Wideband Digital RF Power Meter – buy the PCB HERE.
Simple to build and low in cost, this Digital RF Power Meter will be very useful for anyone who needs to measure radio frequency signals from 1MHz to 6GHz.

Switchmode Replacement for 78xx regulators – buy the PCB HERE.
The very handy 78xx three-terminal regulators have been around for over 50 years, but they can be inefficient – now there is a drop-in high-efficiency alternative.

Series, Features and Columns

The Fox Report by Barry Fox
Security issues
tekkiepix.com pic of the month: The CD – Compact Disc audio

Techno Talk by Mark Nelson
Soldering on

Net Work by Alan Winstanley
This month, the never-ending problem of online security. From domestic fridges to critical national infrastructure, everything is online and we are all vulnerable.

Circuit Surgery by Ian Bell
Transformers and LTspice – Part 3

KickStart by Mike Tooley
Part 4: Introducing the Arduino Pro Mini

Make it with Micromite by Phil Boyce
Part 31: Using the Cricket IoT module with a Micromite

Max’s Cool Beans by Max The Magnificent – buy the SMAD display HERE.
Flashing LEDs and drooling engineers – Part 18

Audio Out – buy the PCB HERE.
Microphone Preamplifier (for Vocoder) – Part 4

Downloads

Download the files associated with this issue HERE.