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Contents Vol.36, No.06 June 2023 14 Starlink, Swarm and Starshield SpaceX is providing affordable internet anywhere in the world via Starlink! They do this via a cluster of satellites in low Earth orbit (LEO). SpaceX also offers the Swarm and Starshield services, aimed at remote connectivity for IoT devices and government users respectively. By Dr David Maddison Technology feature 38 The History of ETI Magazine This article explains what happened during Electronics Today International (ETI) magazine’s 19 year lifespan. It started on March 23rd, 1971 and lasted until its merger with Electronics Australia (EA) in June 1990. By Peter Ihnat History feature 56 Using Room EQ Wizard (REW) While you don’t need our Loudspeaker Test Jig to use this software, they are an ideal combination. We describe how to set up and use REW or Speaker Workshop for designing and tweaking loudspeakers. By Phil Prosser Software guide The history of: ETI MAGAZINE starting on page 38 Page 26 Basic RF Signal Generator LOUDSPEAKER TESTING JIG 70 The Y2K38 Bug The Y2K bug ended with a fizzle due to diligent preparations; however, it isn’t the only time related bug. We cover what we are doing to make sure our newest project does not succumb to these issues. By Tim Blythman Software feature 26 Basic RF Signal Generator This RF Signal Generator uses an AD9834 IC to generate a test signal from 10Hz to 25MHz. It’s ideal if all you need is a simple piece of test equipment that is also compact and easy to build. By Charles Kosina Test equipment project Page 44 2 Editorial Viewpoint 5 Mailbag 37 Subscriptions 69 Product Showcase 83 Circuit Notebook Our Loudspeaker Test Jig allows you to measure complex impedances via your PC. And as per the name, connecting a microphone to it lets you test loudspeakers. It allows you to measure the speaker or driver frequency, phase response, relative SPL and more. By Phil Prosser Audio / Test equipment project 86 Vintage Radio 60 WiFi Time Source for GPS Clocks 96 Serviceman’s Log 44 Loudspeaker Testing Jig The Raspberry Pi Pico W is the perfect substitute for a GPS module, especially when you cannot get a reliable GPS signal. You can instead source the time from an internet NTP server via WiFi. We show you how to modify our existing GPS clock designs to use the Pico W module instead. By Tim Blythman Timekeeping project 72 Wideband Fuel Mixture Display, Pt3 To finish off our Fuel Mixture Display, we cover the construction details, how you configure, install it in your car and use our Bluetooth app. By John Clarke Automotive project 1. Carbon monoxide (CO) detector 2. DCC block train detector 3. Cupboard light 4. 3D-printed case for SMD Test Tweezers Servicing Vibrators, Pt1 by Dr Hugo Holden 104 Online Shop 106 Ask Silicon Chip 111 Market Centre 112 Advertising Index 112 Notes & Errata