This Simple LM317 Audio Amplifier Circuit is a kind of like small trick to make speaker sound louder; also this LM317 chip usually is used to control voltage but here it works like small music booster amp. Therefore, it is not very strong amp but still helps give little more sound from the music source; […]
Mini Projects
Simple Micro Ampere Meter Circuit
Simple Micro Ampere Meter Circuit is like a special tool to measure small electric, normal tools too are strong but are not good for tiny current. But this one uses super sensitive meter microammeter or maybe special setting on multimeter to find very small electric flow like millionth of amp. Also, other parts like resistors […]
Simple Light Activated Alarm Circuit
This Simple Light Activated Alarm Circuit is like very sharp nightlight, it have small part called LDR which work like a tiny eye. Furthermore, when light goes away fast like someone is moving near circuit it make sound or light happen to warn us. Moreover, it also uses other parts like transistors, resistors, capacitors to […]
Simple Skin Biofeedback Circuit
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. Also, signal change when person feel more calm or is not calm; hence, the circuit show this change maybe with light or sound so person can learn […]
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. Furthermore, if freezer become warm too much then buzzer makes loud sound to tell us something is not right, like food is going to melt. Hence, with this indication we can do […]
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. Also, it works quietly with no noise and last a long time, it is very good […]