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Practical Electronics Volume 53. No. 5 May 2024 ISSN 2632 573X Contents Projects and Circuits GPS-Disciplined Oscillator by Alan Cashin 16 This GPS-Disciplined Oscillator is mostly built in software, so it only requires a PIC, an oven-conditioned crystal oscillator and a few other supporting parts. It provides an extremely accurate 10MHz signal with an error in the parts per billion range. Dual RF Amplifier by Charles Kosina 26 This small RF amplifier has two outputs with individually selectable gains. This makes it suitable to add to a signal generator to provide a higher output level, or for better drive strength, or ‘fanning it out’ to multiple other pieces of equipment and more. UVM-30A Module Ultraviolet Light Sensor by Jim Rowe 29 This UV light-sensing ‘breakout’ module detects the intensity of UV solar radiation and hence the degree of protection you may need to prevent skin damage. If you connect it to an Arduino or other microcontroller, it can even indicate the current ‘UV Index’. Songbird by Andrew Woodfield 33 Here’s a decades-old design brought up to date in a new package and made to appeal to beginners as well as experienced builders. It’s quick and easy to build and a great project if you’re new to electronics. Series, Features and Columns Techno Talk by Max The Magnificent One step closer to a dystopian abyss? 8 Net Work by Alan Winstanley Reports on an environment monitor and Tapo smart sensors; news of forthcoming (expensive!) electric cars from Lotus; plus a roundup of current Moon-shot missions. 9 The Fox Report by Barry Fox Cloning drives the easy way, plus more news on scams 14 NEW SERIES! Teach-In 2024 – Learn electronics with the ESP32 by Mike Tooley Part 3 – Analogue input and output 40 Max’s Cool Beans by Max The Magnificent Arduino Bootcamp – Part 17 50 Audio Out by Jake Rothman Back to the buffers – Part 4 58 Circuit Surgery by Ian Bell Topics in digital signal processing – sampling 63 Wireless for the Warrior Subscribe to Practical Electronics and save money NEW! Practical Electronics back issues DOWNLOADS – 2022 now available! Reader services – Editorial and Advertising Departments Editorial Welcome to May!... Topics in Digital Signal Processing Teach-In bundle – what a bargain! PE Teach-In 9 PE Teach-In 8 PCBs for Practical Electronics projects Practical Electronics PCB Service Classified ads and Advertiser index Next month! – highlights of our next issue of Practical Electronics 2 4 6 7 7 Regulars and Services Made in the UK. Written in Britain, Australia, the US and Ireland. Read everywhere. © Electron Publishing Limited 2024 Copyright in all drawings, photographs, articles, technical designs, software and intellectual property published in Practical Electronics is fully protected, and reproduction or imitation in whole or in part are expressly forbidden. The June 2024 issue of Practical Electronics will be published on Thursday, 2 May 2024 – see page 72. Practical Electronics | May | 2024 25 32 56 68 71 72 1