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Practical Electronics Volume 52. No. 12 December 2023 ISSN 2632 573X Contents Projects and Circuits Digital Boost Regulator by Tim Blythman 17 This board lets you use a PIC18F18146 8-bit microcontroller for any task while its onboard peripherals generate an adjustable voltage without interfering with what it’s doing. It includes capacitive sense buttons and a seven-segment display. 25 Dual-Channel Power Supply for Breadboards by Tim Blythman This Dual-Channel Breadboard PSU plugs straight into a breadboard’s power rails, has two adjustable current-limited outputs and can run from different power sources. Display Adaptor for the Breadboard PSU by Tim Blythman 34 This Display Adaptor attaches to the Breadboard PSU and displays lots of handy data, such as the set and actual voltages and currents. Series, Features and Columns Techno Talk by Max The Magnificent Good grief! Is that the time? 8 Net Work by Alan Winstanley 10 Reports on compact uninterruptible power supplies designed for small electronics during a power outage; how the UK manage power shortages; and space news. The Fox Report by Barry Fox Too cheap to be true? 15 Max’s Cool Beans by Max The Magnificent Arduino Bootcamp – Part 12 42 Circuit Surgery by Ian Bell Frequency shifting and superheterodyne receivers – Part 1 48 NEW SERIES! MitchElectronics by Robin Mitchell The 555 Timer IC – Part 1 – building an astable and monostable KickStart by Mike Tooley Part 14: Legacy logic revisited Regulars and Services Made in the UK. 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 Amazing Electronics Exclusive Microchip reader offer Win a Microchip PIC24F LCD and USB Curiosity Development Board PE Teach-In 9 Teach-In bundle – what a bargain! PE Teach-In 8 Practical Electronics PCB Service PCBs for Practical Electronics projects Classified ads and Advertiser index Next month! – highlights of our next issue of Practical Electronics 54 61 2 4 6 7 7 9 32 33 47 68 71 72 Written in Britain, Australia, the US and Ireland. Read everywhere. © Electron Publishing Limited 2023 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 January 2024 issue of Practical Electronics will be published on Thursday, 7 December 2023 – see page 72. Practical Electronics | December | 2023 1