https://twiar.net North America's Premiere Amateur Radio News Magazine Sun, 25 Jan 2026 06:36:07 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://twiar.net/wp-content/uploads/2020/05/cropped-twiarlogo512px-32x32.jpg https://twiar.net 32 32 https://twiar.net/2026/02/12/via-hackaday-isolated-ac-dc-power-supply-and-testing-station-for-230-v-devices/ Thu, 12 Feb 2026 13:45:40 +0000 https://twiar.net/?p=39199 When you’re testing or debugging some mains-powered gear, plugging it directly into the outlet can...]]> https://twiar.net/2026/02/02/via-hackaday-calculating-the-capacitance-and-esr-specifications-for-the-output-capacitor-in-your-switching-mode-power-supply/ Mon, 02 Feb 2026 12:45:42 +0000 https://twiar.net/?p=39032 [Dr Ali Shirsavar] from Biricha Digital runs us through How to Select the Perfect Output...]]> https://twiar.net/2025/12/29/via-hackaday-build-a-high-voltage-supply-for-vacuum-tube-work/ https://twiar.net/2025/12/29/via-hackaday-build-a-high-voltage-supply-for-vacuum-tube-work/#comments Mon, 29 Dec 2025 20:14:48 +0000 https://twiar.net/?p=37524 If you work on simple digital projects, just about any bench supply will offer the...]]> https://twiar.net/2025/12/29/via-hackaday-build-a-high-voltage-supply-for-vacuum-tube-work/feed/ 1 https://twiar.net/2025/10/04/via-hackaday-fnirsi-ips3608-a-bench-power-supply-with-serious-flaws/ Sat, 04 Oct 2025 20:45:00 +0000 https://twiar.net/?p=35770 Fnirsi is one of those brands that seem to pop up more and more often,...]]> https://twiar.net/2025/06/16/via-hackaday-white-led-turning-purple-analyzing-a-phosphor-failure/ https://twiar.net/2025/06/16/via-hackaday-white-led-turning-purple-analyzing-a-phosphor-failure/#comments Tue, 17 Jun 2025 02:45:57 +0000 https://twiar.net/?p=32572 White LED bulbs are commonplace in households by now, mostly due to their low power...]]> https://twiar.net/2025/06/16/via-hackaday-white-led-turning-purple-analyzing-a-phosphor-failure/feed/ 1 https://twiar.net/2025/06/02/via-hackaday-testing-a-cheap-bench-power-supply-sold-on-amazon/ https://twiar.net/2025/06/02/via-hackaday-testing-a-cheap-bench-power-supply-sold-on-amazon/#comments Tue, 03 Jun 2025 02:45:38 +0000 https://twiar.net/?p=31755 We’ve all seen those cheap bench power supply units (PSUs) for sale online, promising specifications...]]> https://twiar.net/2025/06/02/via-hackaday-testing-a-cheap-bench-power-supply-sold-on-amazon/feed/ 1 https://twiar.net/2024/10/28/via-hackaday-a-power-supply-with-ultra-high-resolution-current-measurement-built-in/ Mon, 28 Oct 2024 06:53:00 +0000 https://twiar.net/?p=24449 Need to do some real fine power consumption measurements? [Gero Müller] was in that exact...]]> https://twiar.net/2024/10/24/via-hackaday-power-supply-pcb-redesign/ https://twiar.net/2024/10/24/via-hackaday-power-supply-pcb-redesign/#comments Thu, 24 Oct 2024 12:44:00 +0000 https://twiar.net/?p=24788 We’ve often heard you should do everything twice. The first time is to learn what...]]> https://twiar.net/2024/10/24/via-hackaday-power-supply-pcb-redesign/feed/ 1 https://twiar.net/2024/08/31/via-hackaday-comparing-aliexpress-vs-lcsc-sourced-mosfets/ Sat, 31 Aug 2024 15:28:00 +0000 https://twiar.net/?p=22881 These days, it’s super-easy to jump onto the World Wide Web to find purported replacement...]]> https://twiar.net/2024/08/27/via-hackaday-a-field-guide-to-the-north-american-substation/ Tue, 27 Aug 2024 10:23:00 +0000 https://twiar.net/?p=22778 Drive along nearly any major road in the United States and it won’t be long...]]> https://twiar.net/2024/04/12/via-hackaday-1950s-switching-power-supply-does-it-mechanically/ Sat, 13 Apr 2024 03:37:00 +0000 https://twiar.net/?p=20644 When you hear about a switching power supply, you think of a system that uses...]]> https://twiar.net/2023/07/06/via-hackaday-spy-radio-setup-gets-a-tiny-power-supply-for-field-operations/ Fri, 07 Jul 2023 02:07:46 +0000 https://twiar.net/?p=16400 [Helge Fyske (LA6NCA)] may not be an actual spy — then again, he may be;...]]>