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Receiver for Fibre-Optic IR Extender

Published in issue 290, July 2000

There are various types of remote-control extenders. Many of them use an electrical or electromagnetic link to carry the signal from one room to the next. Here we use a fibre-optic cable. The advantage of this is that the thin fibre-optic cable is easier to hide than a 75-? coaxial cable, for example. An optical link also does not generate any additional radiation or broadcast interference signals to the surroundings.

Components

Relevant products

R1 = 47Ω
R2 = 4kΩ7
R3 = 4Ω7
R4 = 8kΩ2
R5 = 3kΩ3
Capacitors:
C1,C4 = 220µF 25V radial
C2 = 100nF ceramic
C3 = 4µF7 63V radial
Semiconductors:
D1 = high-efficiency LED
D2 = 1N4002
IC1 = SFH506-36 (Siemens)
IC2 = TOTX173 (Toshiba)
IC3 = 78L05

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