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 ...

This Iniu power bank features a 10,000mAh (37Wh) battery capacity. If you factor in 80% power efficiency, here are the ...

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 ...

Amazon is finally offering another 10,000mAh power bank priced under $10. Right now you can pick up a Baseus 10,000mAh USB Type-C Power Bank with up to 20W of Power Delivery for only $9.99 after you ...