Can anyone think small timer for their electric things? Simple Time Delay Relay Circuit work like stopwatch for power. It waits for some time before turning ON or OFF something like light or motor. This wait time can be same always like 5 second or can change using timer knob. Main reason to use it […]
Simple Multi Siren Tones Circuit using IC UM3561
This Simple Multi Siren Tones Circuit using IC UM3561 chip is like small sound box for emergency car sound. This special chip UM3561 can make many siren noise like police car “wee woo” or ambulance fast tone. It only needs few more parts and one speaker, then this circuit can make those sound come alive. […]
Simple Temperature Controlled DC Fan Circuit
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 […]