Wireless Doorbell
Keywords:
HT12D Decoder IC, IC555 timer, RF Module (Transmitter & Receiver), Transformer , Capacitor , Resistor , Bridge rectifier, power supply using 7805Abstract
Now-a-day’s wireless control of appliance is in practice, because of its advantage like no wire is needed,
multiple controlling is less complicated. The controlling range of wireless doorbell is 100M. As the wireless doorbell is
wireless based project, it is divided into two major section i.e. transmitter and receiver. Trimmer VC1 is used to adjust
the transmitter frequency. Receiver: The receiver section is further divided into two main sections i.e. RF amplifier
section and bell trigger section.