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
Battery Chargers
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
Simple 1.2V AA Ni-MH Battery Solar Charger circuits
This is a simple 1.2V AA battery Solar charger circuit. Imagine, if you want to charge only one or two 1.2V AA Ni-MH batteries, and must be charged outdoor without home electricity. What could we do? If what you have are plain components. Is it possible to use those components? to create a circuit according … Read more
Constant current circuit using transistors
Learning experiments with simple constant current circuit using transistors, a few plain parts, so helpful, especially Ni-HM battery charger. Read more
Gel cell battery charger circuit
It can charge any size of the Gel cell batteries and extend the life of the Gel Cell battery. While the circuit is running, the LED indicates charging. Read more