Battery is very important in many electronic systems. However battery voltage drops with time, if voltage becomes too low then battery can get damaged. So low voltage indication is needed. Therefore, this 12V Battery Low Voltage Alarm Circuit helps to protect battery. It gives visual and sound alert and is simple and is with low […]
Battery Charger Circuits
Low Voltage Alert Circuit for 9V Battery
Battery power is very important in electronic circuits. But many times a battery voltage becomes low without notice. As a result, devices stop working suddenly and therefore, a low voltage alarm is needed. This Low Voltage Alert Circuit for 9V Battery gives warning when a 9V battery goes low. It uses LM339 comparator IC and […]
6V To12V Lead Acid Battery Charger Circuit
This article for 6V To12V Lead Acid Battery Charger Circuit explains about a dual voltage battery charger circuit. Lead acid battery needs correct voltage for proper charging. This charger circuit gives correct charging for both batteries. LM317 IC is the main part of the circuit and it gives stable charging voltage. Battery voltage is selected […]
555 Pulse Generator Li-ion Battery Charger Circuit
Charging a Li-ion battery does not need big smart charger. But we can do it with one small 555 timer chip. This 555 Pulse Generator Li-ion Battery Charger Circuit makes fast little pulses that charge the cell gentle and safe. Anyone can build this circuit with very few parts and with very low cost. A […]
Low Cost 1.2V AA Ni-MH Solar Battery Charger Circuit
This project shows about a Low Cost 1.2V AA Ni-MH Solar Battery Charger Circuit. It works with small cheap solar panel as it charges the battery safely in sunlight. It uses only solar panel, diode, resistors and two transistors. And these parts are few which are easy to find. The circuit protects battery from too […]
Solar Water Pump Circuit using Battery and MOSFET
In my earlier article I showed about solar water pump circuit using relay. That design works, but relay makes clicking sound and relay contacts can burn after long use. So now here is the new version. This project is Solar Water Pump Circuit using Battery and MOSFET instead of relay. MOSFET has no moving parts, […]