In today’s fast-paced life, we often leave our mobile chargers, Laptop chargers or small appliances plugged in longer than ...

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 ...

Most switch-mode power supplies rely on a PWM (pulse-width-modulated) output that is controlled via voltage feedback. A 555-timer IC can inexpensively perform PWM. The circuit in Figure 1 shows how to ...

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 ...