AVRO Hand Dryer (HD-01)

A hand dryer is an electric machine which might make use of a heating element and an air blower to dry the hands after hand washing. It is commonly used in public toilets as a cost-effective alternative to paper towels.Petri dishes exposed to bathroom air for two minutes with the hand dryers off only grew one colony of bacteria, or none at all. However, petri dishes exposed to hot air from a bathroom hand dryer for 30 seconds grew up to 254 colonies of bacteria (though most had from 18 to 60 colonies of bacteria). The hand dryer consists of Light Department Resistor (LDR) and 555 timer IC. The 555 timer IC is work as a monostable mode that it drives with the 5 V relay.