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Contents Vol.39, No.05 May 2026 16 Analog Computers, Part 1 Nowadays computing is pretty much all digital, so have we moved on from analog computers; or might they come back? We look at what makes analog computers unique, with historical and modern day examples. By Dr David Maddison, VK3DSM Technology feature Analog Computers Page 16 40 Electronex 2026 The Electronex exhibition is back in Sydney this year, to be held at Rosehill Gardens Event Centre on the 3rd and 4th of June. By Various Authors Trade exhibition showcase 76 Power Electronics, Part 7 In this series of articles, we explore the principles of power electronics. This month, we cover resonant converters and soft switching, and how switching losses can be a greater problem at higher frequencies. By Andrew Levido Electronic design Page 62: compact and simple ¬C Meter 82 Installing a CB Radio in your Car Here’s how to neatly fit your own CB radio in a car, which can be very useful when driving on country roads. By Julian Edgar Automotive / radio feature 90 BrisbaneSilicon ELM11 Board The ELM11 is an affordable development board that uses the LUA programming language and is designed in Australia. Review by Tim Blythman Microcontroller development board 30 Power Amp Clipping Indicator Protect your loudspeakers from being overdriven and possibly destroyed with our Clipping Indicator. It can reduce the signal level applied to an amplifier, protecting the speakers, and can be built-in or standalone. By John Clarke Audio project 62 Simple LC Meter Using just 20 parts, this tiny LC meter can measure inductances from <10nH to around 100mH and capacitances from <10pF to about 1μF. It’s powered from a single AA cell and is housed in a 3D-printed case. By Andrew Woodfield Test & measurement project 69 WiFi Alarm Monitor This project is ideal for checking up on the elderly. It monitors both an alarm condition (like a burglar alarm going off) and daily activity. It can then send a remote alert to a device like a phone or an email address. By Kenneth Horton Monitoring project 84 μDCC Decoder Our previous DCC Decoder was a small design at 23 × 14mm, but we thought we could one-up it and make it even smaller. This microDCC (μDCC) Decoder measures 18 × 12mm and even has sound output. Part 7 by Tim Blythman Model train project Page 69 WiFi Alarm Monitor 2 Editorial Viewpoint 4 Mailbag 89 Subscriptions 94 Circuit Notebook 97 Online Shop 98 Serviceman’s Log 104 Vintage Radio 109 Ask Silicon Chip 111 Market Centre 112 Advertising Index 1. SOT-223 adaptor for VAS transistors 2. Automatic level crossing controller 3. Battery charger using a relay and lamp Airzone 6552A Concert Star by Associate Professor Graham Parslow