This one is a special and Simple Skin Biofeedback Circuit which help people learn about skin. It uses sticky pads put on skin to catch small electric signal. Signal change when person feel more calm or is not calm. The circuit show this change maybe with light or sound so person can learn to relax […]
Simple Freezer Alarm with Buzzer Circuit
Simple Freezer Alarm with Buzzer Circuit is like small guard for our ice food. It uses one sensor, thermistor to check cold level. If freezer become warm too much then buzzer makes loud sound to tell us something is not right. Like food is going to melt. With this indication we can do something fast […]
Automatic Doorbell Light Circuit
Automatic Doorbell Light Circuit is like small help friend for our door When someone presses doorbell light turn ON by itself near button. It help us to see button easily and specially in night or dark time. So we can open door fast and can be safe for visitor. Circuit Working: Parts List: Category Component […]
Simple Solid State Relay (SSR) Circuit
Simple Solid State Relay (SSR) circuit is like ON/OFF switch but with more better and modern. Not like normal switch with moving parts but this one uses special electronics parts like transistor or triac for turning ON or OFF. It works quietly with no noise and last a long time. It is very good for […]
Simple High Temperature Alarm Circuit using IC 555
Simple High Temperature Alarm Circuit using IC 555 uses one special chip called IC 555 which works like a temperature guard. It keep checking temperature always. If its too much hot it make alarm sound like buzzer and tell us something is getting too hot. So we can know early and fix before big problem […]
Simple Led Driver Circuit using IC LT1932
This Simple Led Driver Circuit using IC LT1932 chip works like special power for LED lights. LEDs do not like too much or too little power so this circuit gives just a right amount and then LED shine good and live long. LT1932 chip work like traffic police it controls power flow nice and smooth […]