ELECTRONIC HAND DRYER

Here is an interesting project. One can dry damp hands without using a towel by using this project. The moment we put our hands in front of the glowing bulb, we start felling hot air coming from a fan and a heater. The hands are dried. When we remove our hands then the heater and the fan stop working automatically. This circuit is senses the presences of hands through an LDR on which the light beam falls from the bulb. During the time when the bulb is lighted , the main circuits remains off because there is low resistance in the LDR but when the light from the bulb is cut-off our hands then circuit is activated. The main circuit contains IC 555 and a relay.