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Contents Vol.37, No.11 November 2024 14 Nikola Tesla, Part 2 Nikola Tesla was a prolific inventor, engineer, futurist, essayist and the original ‘mad scientist’. In this two part series we will cover his many (significant) contributions to society. By Dr David Maddison, VK3DSM Biographical feature 42 Precision Electronics, Part 1 This series covers the basics of precision electronics design, with a range of topics from precision op amps to temperature drift and noise. We aim to cover these from a practical perspective, rather than just the theory. By Andrew Levido Electronic design Precision Electronics Part 1 – Page 42 Nikola Tesla the original ‘mad scientist’ Part 2 Page 14 78 0.91-inch OLED Screen These small monochrome OLED modules have a 128 x 32 pixel display and typically use an SH1106 or SSD1306 drive controller IC. Because they use an I2C serial interface they are easy to drive with a microcontroller. By Jim Rowe Using electronic modules 90 Maxwell’s Equations Michael Faraday and James Maxwell helped to define the most basic equations upon which a lot of electronics theory rests. We give some background, explain what the equations mean and why they’re useful. By Brandon Speedie Electronics theory 2 Editorial Viewpoint 5 Mailbag 41 Subscriptions 59 Jaycar Mini Projects 76 Circuit Notebook 95 Online Shop 96 Serviceman’s Log The FlexiDice can display a 100-sided die, but it’s not just restricted to dice. It can also randomly pick a card face from a standard 52-card deck or even perform a simple coin toss. By Tim Blythman Game project 103 Vintage Radio 108 Ask Silicon Chip 82 3D Printer Filament Dryer, Part 2 111 Market Centre Store up to four 1kg reels of 3D printer filament, while keeping it warm and free of moisture using our Filament Dryer. The filament is drawn straight out of the sealed box making it easy to keep jobs going. By Phil Prosser 3D printer accessory 112 Advertising Index 112 Notes & Errata 24 Variable Speed Drive Mk2, Part 1 Our new Variable Speed Drive is smaller, cooler & more efficient. It can drive single-phase shaded pole or permanent split capacitor (PSC) induction motors, as well as three-phase 230V induction motors, both up to 1.5kW. By Andrew Levido Motor speed control project 48 Surf Sound Simulator Enjoy the sound of the beach from the comfort of your home. The Surf Sound Simulator is a fun project on a colourful surfboard-shaped PCB that is perfect for beginners or experienced constructors, using all through-hole parts. By John Clarke Audio relaxation project 66 FlexiDice 1. Analog pace clock & stopwatch 2. Digital spirit level 1. Tunnel timer using a 555 2. Simple negative rail generation 3. Model train rail blockage detector Revisting the Zenith Royal 500 by Ian Batty