Battery is very important in many electronic projects, but however battery voltage goes down slowly and so device may stop working properly. Therefore, to solve this problem we have built a simple 6V to 12V Battery Monitor Circuit using CMOS IC 7555. This circuit uses IC 7555 timer and it gives indication using an LED, […]
Battery Charger Circuits
3V Battery Operated Lamp Flasher Circuit
In this article, we will explain about a simple and easy 3V Battery Operated Lamp Flasher Circuit. It is used to flash a lamp using only 3V supply. Usually, low voltage flashing circuits give low output current. However, this circuit gives high current output and therefore, it can drive a small lamp easily. The heart […]
12V Battery Low Voltage Alarm Circuit
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 […]
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 […]