This post shows very easy way to make Simple Automatic Battery Charger Circuit using One Transistor and with few parts. This circuit charges battery by itself like small machine. It uses only one transistor, one resistor and one LED. Good for charging 9V battery where LED shows when charging. But this is basic charger with […]
How to Find the Charging Current of a Battery
To charge battery safely we need right amount of electricity like current. It is the same like plant needs right water. Most people use multimeter to check this but not everyone has it. In this article for How to Find the Charging Current of a Battery is easy trick without tool: Circuit Working: Parts List: […]
Simplest Blown Fuse Indicator Circuit
This Simplest Blown Fuse Indicator Circuit shows if fuse is good or bad without checking it by hand. If fuse is okay then green LED turns ON. If fuse blows then green LED goes OFF and red LED turns ON. That means fuse is bad and needs to change. Circuit Working: Parts List: Component Description […]
Simple Li-ion Battery Capacity Tester Circuit
Imagine we have a phone battery but how long does it really last? This Simple Li-ion Battery Capacity Tester Circuit is like a battery health checker. It shows how much power our Li-ion battery like in phones or laptops can still hold. It helps us know if the battery is getting weak and needs change. […]
How to Generate a Safe 220V AC Supply
If anyone’s project needs How to Generate a Safe 220V AC Supply from home power, then this is the circuit but we need to be careful. This voltage is dangerous. To stay safe we can use a step-down transformer. It makes voltage lower and safer. It also has safety parts to stop electric shocks. Circuit […]
Simple Capacitive Touch Switch Circuit using IC TTP223
No button needed as this circuit uses a smart chip known as TTP223 to feel our touch. Like magic it touches the pad and it turns ON or OFF This Simple Capacitive Touch Switch Circuit using IC TTP223 is an easy way to make a touch switch for fun or projects. Circuit Working: Parts List: […]