Fast Charger for Better Lead-Acid Battery Life

Compromising between the speed while maintaining safe operation for battery charging is an interesting challenge. This circuit can be used to charge a battery , and it’s safe and  rapid.  To get quickly charged, this circuit charge with initial charging voltage of 2.5V per cell.  To keep it safe, this circuit prevent the battery from overcharging by lowering the voltage […]

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Ni-Cad Battery Zapper, A Rechargeable Battery Reconditioner

Ni-Cad (NiCd, NiCad) battery, sometimes doesn’t work as expected, gives no power and cannot be recharged. In this situation, the battery need to be reconditioned. It’ is possible that the battery is internally shorted, and we can get the battery into life again by recondition the Ni-Cad battery using a zapper circuit. This circuit restore the Ni-Cad battery from shorting […]

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Auto-Off 12V NiCd Battery Charger

NiCd/NiCad battery charger circuit is still needed since some application demanding high current is still rely on NiCd type, since this type is still superior in term of  high current output (low internal resistance) and low cost. This  battery charger circuit is used to charge 12V NiCd battery at  around 74 mA until battery is fully  charged. This circuit need  […]

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Low Cost Universal Battery Charger

This is a Low Cost Universal Battery Charger Circuit. This circuit is used to charge NiCD-NiMH batteries and ideal for car use. This circuit transforms a mains adapter to a charger. It can be used to charge MP3 players, portables, toys cellular phone, video batteries. This circuit also has selectable charge current. To indicate this device is charging, an LED […]

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USB Devices Charger

If you are traveling, you might need this device to charge your gadget along the way, since it is much cheaper to buy some standard AA batteries for backup than buying several rechargeable batteries of your gadget type. Below is a charger that more efficient than linear regulator like the “7805” while you are on the go. The most important […]

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12V Car Battery Charger

This is 12V Car Battery Charger simple circuit. This circuit is designed to solve some problems that occurs in most car battery chargers. The problem that occur in most car battery chargers is when the charger is not turned off, the battery will overcharge, the plate of the  charger will destroyed and the electrolyte of the charger will lost because […]

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