This Simple Multi Siren Tones Circuit using the UM3561 chip works like a small sound box for emergency vehicle sounds. Moreover, the special UM3561 chip can create many siren noises, such as the “wee woo” sound of a police car or the fast tone of an ambulance. Furthermore, it only needs few more parts and […]
Mini Projects
Simple Temperature Controlled DC Fan Circuit
Simple Temperature Controlled DC Fan Circuit is like smart fan, which uses special sensor to feel heat around; so when place, it get too hot then circuit makes fan run fast like turning AC high. Therefore, if the place cools again then fan slow down or stop to save power, hence, this circuit uses parts […]
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, as it takes normal home current 220V and make those special white LEDs glow. Also, the circuit works like converter and change big voltage to small one which are good for LEDs. Inside small parts like resistors, […]
Simple Fatigue Testing Circuit
This small and simple Fatigue Testing Circuit is a fun way to check whether someone feels tired or not! it makes LED blink very fast and we can change how fast it blink. Also, if we are not tired, we can still see the LED blink even when it flashes fast; however, if we are […]
Simple Earth Fault Indicator Circuit
Simple Earth Fault Indicator Circuit is like safety guard for electric system, as it checks if electric connects to ground by mistake, like when bad wire touch metal box. Also, 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 […]
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; Moreover, the circuit is simple and we can make it with one or more flashing LEDs by using high-voltage DC from the mains. Also, we can use it as mains power indicator or just for flashing […]