Automatic Night Lamp Circuit using Battery Power works on battery and saves energy. It turns ON in dark and OFF in light. This circuit is good for bedroom, hallway, stairs and gives light at night. It uses two 1.5V batteries and has 7555 timer chip, LDR as light sensor and LED as light. Circuit Working: […]
Battery Charger Circuits
Simple Battery Charging Indicator Circuit using IC LM393
Simple Battery Charging Indicator Circuit using IC LM393 shows if battery is charging or not. It helps stop overcharge and through this charging becomes safe and better. Main part is LM393 comparator IC. It turns ON LED to show charging. Circuit is easy and cheap and is good for checking 12V lead-acid battery. Circuit Working: […]
Ni-Cd Battery Charger Circuit using Transistors
Nickel Cadmium (Ni-Cd) batteries are very common for rechargeable use. They give good power and work long time with many charges. To charge them right we need a special charger made for Ni-Cd. Mostly it is for 12V Ni-Cd battery pack. This article for Ni-Cd Battery Charger Circuit using Transistors shows simple and strong charger […]
Ni-MH Battery Charger Circuit with IC LT4060
Nickel Metal Hydride (Ni-MH) batteries are popular for small devices. They give good power and can be charged again. To keep them working long time, proper charging is very important. The Ni-MH Battery Charger Circuit with IC LT4060 shows a strong charger using LT4060 IC from Linear Technologies. This IC is made to charge 1.2V […]
Simple Battery Eliminator Circuit using IC LM317
Simple Battery Eliminator Circuit using IC LM317 gives steady DC power with no need of normal battery. It is good for small devices needing stable voltage. This article show how to make simple battery eliminator using LM317 IC. We also can show circuit to replace 9V battery. It can be used for any device which […]
Simple Wall Adapter to Battery Changeover Circuit
Simple Wall Adapter to Battery Changeover Circuit is very useful for battery systems. It help to switch power between wall adapter which is main and battery which is backup without stop power. So device get power all the time with no break. LTC4412 IC is very important part of this circuit. It control P-channel MOSFET […]