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 […]
Simple 220V Diac Controlled LED Flasher Circuit
This Simple 220V Diac Controlled LED Flasher Circuit is an easy way to make LED blink using AC power. Circuit is simple it make one or more LED flash using high voltage DC from mains. We can use it as mains power indicator or just for flashing light effect. Circuit Working: Parts List: Component Quantity […]
Simple IC TDA2822 Stereo Audio Amplifier Circuit
Simple IC TDA2822 Stereo Audio Amplifier Circuit is small chip with stereo amplifier makes weak music sound go louder which is strong enough for speaker or headphone. Despite using very little energy it still provides 250 milliwatts each side with good sound for small things like walkman, hearing aid or little stereo. So next time […]