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 electric […]
Simple Mains AC Transients Indicator Circuit
Think like anyone have one small device to check its home electricity going up and down. This 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 the voltage. If voltage […]
Simple 220V Diac Controlled LED Flasher Circuit
This circuit maybe 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 Resistors 22k 1/4 watt 2 220Ω 1/4 […]
Simple IC TDA2822 Stereo Audio Amplifier Circuit
This 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 anyone hears music should say thanks to […]
Simple Solar Powered Animal Scarer Circuit
This Simple Solar Powered Animal Scarer Circuit is special as it uses sun power to stop animals come close. It make noise flash like a light or do other thing to scare animal like bird, rat or even big animal. People who have garden, farm or open place use this to keep plant and human […]
Simple Full Duplex Audio Line Circuit
Simple Full Duplex Audio Line Circuit is like a strong talking line. Two people can talk at a same time on one wire like a phone call. Not like a walkie talkie where only one person talk and other wait. But with full duplex both people talk anytime like a actual talking. Circuit Working: Parts […]