This is a small DIY Solar Battery Charger Circuit project. It charges one 3.7V lithium battery using sunlight. 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: This graph show […]
Battery Charger Circuits
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Small UPS Circuit for Router Backup
Never lose connection again, make this Small UPS Circuit for Router Backup. When there is power cut then internet goes off. Router and modem stop. Small UPS solve problem. This give backup to DSL modem and WiFi router. This circuit is with simple parts, easy to build and with low cost. Circuit Working: Parts List: […]
Battery Operated Automatic Emergency Light Circuit
Automatic emergency light use battery and give light when power is gone. Lamp turns ON itself when main power fails and is good for home, office or anywhere which need extra light. It is best to use 6V lead acid battery or 5×1.2V NiCd cells. The design for Battery Operated Automatic Emergency Light Circuit is […]
12V Battery Powered Fluorescent Lamp Driver Circuit
Fluorescent lamp need high voltage AC to start and keep glowing. This 12V Battery Powered Fluorescent Lamp Driver Circuit uses 12V battery to run fluorescent lamp. It change low voltage DC from battery to high voltage AC for the tube. It is good for battery device and emergency light. Circuit has oscillator, MOSFET switch and […]
Transistor Based Battery Heater Circuit
Transistor Based Battery Heater Circuit uses 12V DC with good heat and very portable. Circuit is good for outdoor, no-electric place, small incubator and emergency heat. It uses astable multivibrator with transistors. Transistors switch power transistor and run heat coils. LED show if circuit is working. Circuit Working: Parts List: Component Value Quantity Resistors (All […]
Battery Level Indicator Circuit using IC MN13811
This tutorial teaches us about Battery Level Indicator Circuit using IC MN13811 It shows when battery is low and indicates us to recharge. Use MN13811 IC and 2 transistors as they work together to turn ON the LED when battery is low. The circuit is good for small 3V battery devices. It is for very […]