Their benefits are such that it’s become surprisingly rare to see a traditional linear power supply with a mains-frequency transformer and rectifier circuit, so [ElectroBoy]’s dual voltage PSU ...

That’s because he prototyped a way to use power tool batteries as an emergency source — basing his circuit on a 7812 linear regulator which got piping hot in no time flat. His next ...

Here's a reminder that many power generators can be had tax-free during the 2021 Texas emergency supplies tax-free weekend — they just have to be below a certain value. Prepare yourself during ...