Project Profile on Domestic Electronic Timer

Abstract

In day to day life it has become necessary to have automatic domestic device to reduce labour and wastages. In this aspect the electronic domestic timer can play a vital role in the house holds for switching off the house hold appliances at predetermines time and duration by the house wives. The unit consists of (1) a timing ciruit formed by resisters and capacitors, (2) IC 555 to perform triggerig function determined by the resistor capacitor constant, (3) driving stag (formed by a transsistor) and a piezo buzzer housed in a cabinet. in the front panel calibrated time - sale will be there to select required time settings. The complete circuit works generally on 1.5 V Battery. The time could also be built in a particulr appliance by using a driving stage & solenoid/ reply to switch off the appliance etc.