Just move hand in front of this Liquid soap dispenser. You get few drops of liquid soap for hand wash. Made it Non contact to prevent hand contamination from the press handle of the dispenser if it is used in common places.
A Simple Water level indicator circuit indicating 5 stage water levels in the tank. LED1 glows when the water tank is empty. LED 5 glows when the tank is full. LED 2 indicated 40%, LED 3 indicates 60% and LED 4 indicates 80% water in the tank. LEDs glows one by one when the water tank fills and turns off one by one when the water level drops.
Very sensitive. Detects Fire from a distance of 2 meters in a dark room. Beeps loudly till Fire ceases. Since it is detecting Infrared rays, it can be also used as a TV Remote tester.
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Save water .This simple circuit beeps loudly when the water tank becomes full.No more wastage of water.
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Turns on a White LED for 3 minutes and turns off when a human move in front of it. Uses Passive Infra Red (PIR) motion sensor.
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