Build Simple 0-30V 1A Transistor Variable Power Supply Circuit
Need a basic and adjustable power supply? (0-30V at 1A) Let’s use the transistor and diode — it’s cheap, reliable, and perfect for DIYers. Read more
Power supply
5V Switching Regulator Circuit using transistors
This is LM317 Low dropout regulator 5V 2A using TIP41, The voltage input is 5.1V DC is converted into 5V output,while maximum output current to 2A by TIP41 […] Read more
Simple Li-ion Battery Charger Circuit with Automatic Cut-Off
Let’s make Simple Li-ion Battery Charger Circuit with auto cut off when fully charged. To revive batteries that dead or so old. And using common components NE555, TL431. Read more
Recycle Free Li-ion battery from E-waste
We are going to show how to recycle free 18650 Li-ion battery from electronic waste. Our experience using it for almost a year, it runs well. Read more
Let’s learn how Cell Phone Charger circuit work
Modify cheap mobile phone charger inside is simple DC switching regulator circuit and can apply many ways, such as DC power supply Read more