Here’s a great little shortcut that uses the new Set Reminder action in the newest v2.1 of Apple’s Shortcuts app. Tell Siri that you want to take a nap, and it will ask you for how long. It’ll then ...

The new Power Timer, Model TMR-30KE P/N 390-0030-5 from Kussmaul Electronics, eliminates dead batteries caused by power drain from radios and data terminals that operate while the engine is off. The ...

Semiconductor leakage paths can cause excessive quiescent current (also called ground current) in remote sensing applications. These leakage paths shorten battery life and become more critical because ...

Over the years, various power-off circuits have been published. However, the circuit proposed here is very simple and has excellent characteristics. It features a fast power-off transition, with only ...

The venerable 555-type timer makes an effective driver for power MOSFETs, but you have to understand the drive situation when selecting the correct variation of the basic timer. This idea shows how ...