Simple Day Night Activated Switch Circuit using a Triac and LDR show how to make circuit which turns ON and OFF things by seeing outside light. We only need one light sensor (LDR), one resistor, one capacitor and one special switch called Triac. This circuit are used many time for alarm it turns ON light […]
Self Discharge Battery Protection Circuit
This article for Self Discharge Battery Protection Circuit teaches how to make one easy circuit to protect car battery (lead acid type) when not using. This circuit help battery live more long time and keeps it healthy. WARNING: Making lead battery for car can be dangerous. Try to do this with one big person who […]
Battery Saver Circuit
Some things like calculator and TV remote have special circuit inside and this Battery Saver Circuit help to protect battery. If someone forget to turn OFF the circuit stop battery to finish fast. But still battery will lose power slowly with time even with this circuit. The Circuits Goal: After one minute ON or if […]
Dual Battery Charging Circuit
Did anybody’s device ever had no battery but have other batteries with just wrong size? This post show how to make a Dual Battery Charging Circuit. It uses one power to charge two batteries. It uses one small chip called IC 555 and other small things to ensure both battery get same charge. If we […]
Simple Phase Shift Oscillator Circuit using a Single Transistor
Simple Phase Shift Oscillator Circuit using a Single Transistor is like a special electric circuits. They make electric go up and down like water wave. These waves can be soft or hard and also look like curved. How fast wave go up and down are controlled by the circuit control There are many types of […]
Simple USB Lamp Circuit
This small and Simple USB Lamp Circuit show how to make as easy night light using USB port from computer or laptop. To make this only few parts are needed: USB plug like one on phone charger. One LED it gives small light and does not use much power. One resistor it control how bright […]