This project is for Transistor Based 12V Emergency Light Circuit system, which gives light when main power fails. The circuit uses transformer, bridge rectifier, transistor, relay, battery and few other components. When AC supply is present, battery charges and lamp stays OFF and when AC power goes OFF then battery gives supply and lamp turns […]
Battery Charger Circuits
220V Emergency Light Circuit without Transformer
Like our previous tutorial on emergency light circuit, here is another post on 220V Emergency Light Circuit without Transformer. Today, power cut is common problem, so emergency light is very useful, as it gives light when mains supply is OFF. Usually, emergency lights use transformers, but transformers increase the cost and size of the circuit; […]
Easy Emergency Light Circuit using Transistors
Power cuts can occur at any time, causing the room to become dark and uncomfortable, hence, this small circuit provides instant lighting during a power failure without requiring any manual switch operation. Then light turns ON automatically and this happens because of simple and Easy Emergency Light Circuit using Transistors. Now, the circuit works like […]
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 […]
Transistor Based Mini Emergency Light Circuit
Electricity failure is common in many areas, so we need backup light, so this Transistor Based Mini Emergency Light Circuit is simple and with low cost; also it uses few components only and it works automatically when power fails. Therefore, it is useful for homes and small offices and its easy to build even for […]
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, we designed this simple 6V to 12V Battery Monitor Circuit using the CMOS 7555 IC to solve this problem. The circuit uses a 7555 timer IC and an LED to indicate the […]