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.
