Bulb ON/OFF Using TV Remote
INTRODUCTION :-
The aim of this project is to design a circuit such that one can control home or industrial appliances using the help of remote. Using remote to control appliances reducesrhuman efforts without compromising on efficiency. It also saves time. This circuit can be operated upto a distance of 5-10 metres depending upon the remote which we use 38kHz infrared (IR) rays generated by the remote control are received by IR receiver module TSOP1738 of the circuit. Pin 1 of TSOP1738 is connected to ground, pin 2 is connected to the power supply through resistor R5 and the output is taken from pin 3. The output signal is amplified by transistor T1 (BC558).
CIRCUIT DIAGRAM :-
COMPONENTS LIST :-
IC CD4017
IRX TSOP1738
BC558(PNP)
BC548(NPN)
Resistor
Capacitor
Relay 5v dc 100Ω
WORKING :-
Home appliance is controlled either by pressing any key on the remote or by manually pressing switch S1 to ‘on’ state.
The circuit works on regulated 5V which is derived from X1 and regulated by IC1.
The TV/DVD remote controller produces 38kHz frequency.
IR RECEIVER MODULE: The IR receiver module operates at this frequency(38kHz). It is used to control relay RL2.
The relay triggers IC2, which is wired in a bistable mode to control the home appliance connected at the contacts of relay RL1.and 2 of IC2
CD 4017:-
The CD4017 is a CMOS Decade counter IC. CD4017 is used for low range counting applications. It can count from 0 to 10 (the decade count). The circuit designed by using this ic will save board space and also time required to design the circuit.
IR receiver module (IRX1 TSOP1738) :
At normal condition, when IR rays are not incident on TSOP1738, its output at pin 3 remains high. When any TV remote key is pressed, IR rays fall on the TSOP1738 and its output goes low.
Home appliance is controlled either by pressing any key on the remote or by manually pressing switch S1 to ‘on’ state.
The circuit works on regulated 5V which is derived from X1 and regulated by IC1.
The TV/DVD remote controller produces 38kHz frequency.
IR RECEIVER MODULE: The IR receiver module operates at this frequency(38kHz). It is used to control relay RL2.
The relay triggers IC2, which is wired in a bistable mode to control the home appliance connected at the contacts of relay RL1.and 2 of IC2
CD 4017:-
The CD4017 is a CMOS Decade counter IC. CD4017 is used for low range counting applications. It can count from 0 to 10 (the decade count). The circuit designed by using this ic will save board space and also time required to design the circuit.
IR receiver module (IRX1 TSOP1738) :
At normal condition, when IR rays are not incident on TSOP1738, its output at pin 3 remains high. When any TV remote key is pressed, IR rays fall on the TSOP1738 and its output goes low.
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