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Contents Vol.39, No.06 June 2026 12 Analog Computers, Part 2 Analog Computers Analog computers are making a comeback because of how well-suited they are for neural network processing. We take a look at some of the modern analog computers and the features of current-day analog AI workflows. By Dr David Maddison, VK3DSM Technology feature 36 Inspection Reports for PCBs Quality inspection reports are important for ensuring that PCBs will be made to the required standard from your chosen PCB manufacturer. Supplied by PCBWay, it includes useful information on manufacturing. By Steve Mansfield-Devine for PCBWay PCB fabrication 54 Whole-Home Sound System Come and see the trials and tribulations brought about by installing a sound system that covers an entire house. It uses three amplifiers, one preamp, thirteen speakers and hundreds of metres of wiring! By Julian Edgar Home audio 66 Working with e-Paper Displays The Human Comfort Indicator (listed below) is the first project where we have incorporated a bare e-paper display into a design. This article goes into more detail on how e-paper displays work and how we are driving it. By Tim Blythman Display modules 26 Phenomenal Pinball Machine We cover how to design and build every part of your own Pinball Machine. While we provide a standard layout, you can customise it to your own tastes, with different artwork, sounds, lighting and more. Part 1 by Phil Prosser Gaming project 43 Human Comfort Indicator Displaying the temperature, humidity and dew point, this handy little device tells you if an area is comfortable to be in. It’s battery-powered with USB charging, and stores historical data for the last day, week and month. By Tim Blythman Environment measurement project 60 Simple USB Power Monitor Using under 20 parts, this project can measure voltage, current and power supplied over USB up to 36V, 3A and 108W. It displays data on a 0.96-inch OLED screen and supports USB power delivery (PD) 2.0 and 3.0. By Richard Palmer Test & measurement project 70 Micropower SSB Transmitters We wanted to see how small we could make a single-sideband transmitter, so we came up with three designs, one using just three transistors. Each of the designs only use through-hole components and no microcontrollers. By Andrew Woodfield, ZL2PD Radio communications project Cover background image: https://unsplash.com/photos/a-close-up-of-a-pinball-machine-18dGkEQ5wSM Part 2: page 12 Source: www.flickr.com/photos/jitze1942/4304353299/in/ album-72157623284316506 Page 70 Micropower SSB Transmitters 2 Editorial Viewpoint 4 Mailbag 53 Subscriptions 76 Kits 77 Circuit Notebook 80 Serviceman’s Log 86 Online Shop 88 Vintage Radio 99 Ask Silicon Chip 103 Market Centre 104 Advertising Index 104 Notes & Errata 1. iClap intelligent multi-clap switch 2. Interruptible NiMH trickle charger 3. IF signal injector for radios Sailor 66T radio by Dr Hugo Holden