Want to save energy bill? then try this Simple PWM Solar Charge Controller Circuit and get power from sun. It helps to charge battery from solar panel safely and it also gives power to DC load like LED bulb or fan. Just connect solar, battery and load and then controller will do all smart work […]
Battery Charger Circuits
DIY Solar Battery Charger Circuit
This is a small DIY Solar Battery Charger Circuit project, which charges one 3.7V lithium battery using sunlight; also we can use solar cell, TP4056 charger board, one diode, one switch and one boost converter module.. This circuit make 5V power for battery and mobile charging. Graph for lithium battery charge over time: The above […]
Small UPS Circuit for Router Backup
Never lose connection again, make this Small UPS Circuit for Router Backup. When a power cut occurs, the internet goes off and the router and modem stop working; therefore, a small UPS can solve this problem. This give backup to DSL modem and WiFi router and also this circuit is with simple parts, easy to […]
Battery Operated Automatic Emergency Light Circuit
An automatic emergency light uses a battery and provides light when the power goes out. Lamp turns ON itself when main power fails and is good for home, office or anywhere which need extra light; also it is best to use 6V lead acid battery or 5×1.2V NiCd cells. In addition, the battery-operated automatic emergency […]
Transistor Based Battery Heater Circuit
Transistor Based Battery Heater Circuit uses 12V DC with good heat and very portable; also circuit is good for outdoor, no-electric place, small incubator and emergency heat. Furthermore, it uses astable multivibrator with transistors and this transistors switch power transistor and run heat coils and finally, LED show if circuit is working. Circuit Working: Parts […]
Car LED Voltmeter Circuit using IC LM324
Car LED Voltmeter Circuit using IC LM324 is useful project to check car battery voltage, here, LEDs show different voltage which is easy to see battery condition. Main part are LM324 op-amp which act like voltage checker and voltmeter measures voltage between two points. Hence, this circuit is an LED voltmeter using the IC LM324 […]