Power cut can come anytime, so our room becomes dark and feels very scary and bad. So, this small circuit gives light instantly, also there is no switch needed and no tension. Then light turns ON automatically and this happens because of simple and Easy Emergency Light Circuit using Transistors. Now, the circuit works like […]
Battery Charger Circuits
7V Backup Power Supply UPS Circuit
Many small electronic circuits need continuous power supply but sometimes AC mains power fails, because of this our device stops working. Therefore, we need a small Uninterruptible Power Supply. If we need 5V to 7V power supply with about 0.5A current then this 7V Backup Power Supply UPS Circuit is a good option as it […]
6V to 12V Battery Monitor Circuit using CMOS IC 7555
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, […]
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 […]