Simple Temperature Controlled DC Fan Circuit is like smart fan. It use special sensor to feel heat around. When place get too hot then circuit makes fan run fast like turning AC high. If the place cools again then fan slow down or stop to save power. This circuit uses parts like thermistor which change […]
Simple 220V White LED Flood Light Circuit
This Simple 220V White LED Flood Light Circuit is like a small power machine for big bright light. It takes normal home current 220V and make those special white LEDs glow. The circuit works like converter and change big voltage to small one which are good for LEDs. Inside small parts like resistors, capacitors and […]
LM317 IC Solar Charger Circuit with Auto Cut off
LM317 IC Solar Charger Circuit with Auto Cut off works like smart nanny for a battery. It takes sunlight and charge battery but stop at right time. Inside it have one smart chip called LM317 which control charging and gives battery only needed power which is not too much. Best thing is it also have […]
Simple Fatigue Testing Circuit
This small and Simple Fatigue Testing Circuit is fun way to check if anyone is tired or not! It make LED blink very fast. We can change how fast it blink. If anyone is not tired can see the light is still blinking even when it goes fast. But if anyone tired the LED blink […]
Simple Earth Fault Indicator Circuit
Simple Earth Fault Indicator Circuit is like safety guard for electric system. It checks if electric connects to ground by mistake, like when bad wire touch metal box. This is very important because if there is an electric leak the machine may break and cause a fire or may shock people. Circuit watch how much […]
Mains AC Transients Indicator Circuit
Think like anyone have one small device to check its home electricity going up and down. This Mains AC Transients Indicator Circuit is same like that but only for sudden high voltage. These high voltage come from lightning and big machine turning ON or power change. This circuit have one sensor who is always checking […]