DIY a tiny variable power supply скачать в хорошем качестве

DIY a tiny variable power supply

This video shows you how to recycle a laptop power adapter to DIY a variable power supply. The power supply can easily supply electrical appliances with different working voltages, such as driving small motors and charging batteries. We need the following things: 1. A laptop power adapter, we also can recycle the old laptop’s power adapter so we do n’t have to buy a transformer; 2. A voltage ammeter, which can display the output voltage and current at the same time; 3. A DC to DC adjustable step-down power supply board; 4. two Banana Jack Sockets; 5. A Female Power Jack Socket; 6. A Resistance Potentiometer; 7. A transparent plastic box, we can recycle one from plastic packaging boxes so you don't have to buy it. The total cost is only $14, So very cheap and environmentally friendly. Thank you for watching it. Welcome to subscribe to my channel for more videos. ★ Recommended videos Remote controls Without a battery:    • Power a remote control without battery   DIY high sound quality bluetooth audio amplifier:    • DIY bluetooth audio amplifier (Upgrade fro...   Restoration old audio power amplifier:    • Restoration old audio amplifier   ★ Click here to subscribe    / @diyqiqi