Monday, June 24, 2024

Building A Wireless Call Bell With Basic Components

efy tested

Traditional doorbell systems often require extensive wiring, intricate assembly, and the expertise of a qualified electrician for installation. In contrast, wireless doorbells offer a simpler installation process compared to their wired counterparts.

With a lack of complicated wiring, a wireless call bell can be easily installed by anyone within a household.

This article demonstrates the process. Here we incorporate an encoder and decoder for the creation of a wireless call bell system.

POC Video Tutorial In English:

POC Video Tutorial In Hindi:

The prototypes for the author’s transmitter and receiver are depicted in Fig. 1 and 2 respectively.

Wireless Call Bell Transmitter Side
Fig 1: Wireless Call Bell Transmitter Side
Wireless Call Bell Receiver Side
Fig. 2: Wireless Call Bell Receiver Side
Parts List
Semiconductors:
IC1-HT12E encoder
IC2-HD12D decoder
T1-BC547 npn transistor
LED1-5mm LED
Resistors (all 1/4-watt, ±5% carbon):
R1-1-mega-ohm
R2-33-kilo-ohm
R3, R4-1-kilo-ohm
Capacitors:
C1, C3-100μF, 16V electrolytic
C2-0.01μF ceramic disk
Miscellaneous:
S1-Push-to-on switch
S2-On/off SPST switch
CON1, CON2-2-pin connector
TX1-433MHz RF transmitter
RX1-433MHz RF receiver
PZ1-Buzzer
ANT.1, ANT.2-25-30cm wire
Optional:
RL1-5V, SPDT relay
D1-1N4007 rectifier diode
CON2, CON3-2-pin connector
-230V based call bell

Wireless Call Bell – Circuit Diagram



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