Practical Electronics No 6 2025

The Styloclone musical instrument by Phil Prosser. This homage to a musical classic is an excellent project for beginners. It’s also fun for the musically inclined. The whole project fits on one easy-to-build circuit board that can be mounted in a case or built as a free-standing project.
Intelligent Dual Hybrid Power Supply, part one by Phil Prosser. This power supply has two outputs, each capable of up to 25V DC at 5A. They can be connected in series and ganged up to form a dual tracking supply, and both outputs are controlled using a graphical LCD screen, two rotary encoders and two buttons.
Dual Mini LED Dice by Nicholas Vinen. This article is a blend of the old and the new. It was inspired by a design from 1994 but has been updated to use more modern parts (still with discrete logic) and runs from a 3V coin cell. As we have used mostly SMDs, it will easily fit in your pocket.
The Skill Tester 9000, part two by Phil Prosser. This retro game is a fun and educational project to create a dexterity-based game with nine difficulty levels, a health bar graph, a timer and four different sound effects. It is based mainly on 4000-series logic and all through-hole parts on a single circuit board.