Simple Door Bell Circuit Diagram. Above figure shows the circuit diagram for doorbell. This circuit uses the speakers both as microphones and as loudspeaker.
The circuit is a short range radio frequency rf tone generator realized with the help of a cheap 433mhz rf transmitter receiver module pair commonly available from almost all online electronics component shops. The bc547 transistor along with the associated preset and the 100uf capacitor form a simple delay off timer circuit where the preset and the capacitor determines the delay for which the sound output may be sustained once the indicated push button is pressed momentarily. Above figure shows the circuit diagram for doorbell.
The working principal of the circuit doorbell is simple.
The working principal of the circuit doorbell is simple. Single doorbell push button with a single chime. In the model to be simple use a little equipment. Simple time delay circuit using mosfet 2.
