Infa-Red Remote Control

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Infa-Red Remote Control

Postby stress on 11 Dec 2008 13:47

I have received a number of emails requesting schematics for infa-red remotes. So here is one. This remote transmits a tone using an infa-red LED. This tone is decoded by the receiver. Since the receiver only switches when it "hears" the tone, there are no accidental activations.

Part Total Qty. Description Substitutions
R1 1 22K 1/4W Resistor
R2 1 1 Meg 1/4W Resistor
R3 1 1K 1/4W Resistor
R4, R5 2 100K 1/4W Resistor
R6 1 50K Pot
C1, C2 2 0.01uF 16V Ceramic Disk Capacitor
C3 1 100pF 16V Ceramic Disk Capacitor
C4 1 0.047uF 16V Ceramic Disk Capacitor
C5 1 0.1uF 16V Ceramic Disk Capacitor
C6 1 3.3uF 16V Electrolytic Capacitor
C7 1 1.5uF 16V Electrolytic Capacitor
Q1 1 2N2222 NPN Silicon Transistor 2N3904
Q2 1 2N2907 PNP Silicon Transistor
Q3 1 NPN Phototransistor
D1 1 1N914 Silicon Diode
IC1 1 LM308 Op Amp IC
IC2 1 LM567 Tone Decoder
LED1 1 Infa-Red LED
RELAY 1 6 Volt Relay
S1 1 SPST Push Button Switch
B1 1 3 Volt Battery Two 1.5V batteries in series
MISC 1 Board, Sockets For ICs, Knob For R6, Battery Holder
RELAY 1 6 Volt Relay
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