Most of the infrared remotes work on the range below 5 meters. The complexity of the circuit increases when we have to transmit the IR to longer ranges say 10 meters. So you need to multiply the transmitted power into usually four times. This IR transmitter circuit will give you pretty long range.
Circuit Diagram of Long Range IR Transmitter: Click to enlarge
Working
This simple infrared transmitter circuit uses 3 IR transmitter LEDs connected in series to increase the power. The mosfet BS170 which act as a switch, has been used to increase the circuit efficiency. Data (CMOS-compatible) tobe transmitted is used for modulating the 38kHz frequency generated by CD4047 (IC1).
Notes
- Assemble the circuit on a general purpose PCB.
- Use TSOP1738 IR receiving module for efficient reception.
- Assemble the IR LEDs in a torch reflector to increase directivity.
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4 comments:
can you please provide me the model of IR transmitter?
@LordSMS, you can use any normal three infrared transmitting LEDs (IR1 through IR3)that commercialy available.
what is the transmitting range
what are the components have been added in this circuit to increase the distance of IR rays from 5 to 10m.
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