Infrared Transceiver for the PC (1)

This article does more than just describe an IR transceiver that you can use with your PC for remote control and data transfer. Based on the successful Elektor Electronics ‘PC Peripheral Design’ series, it also provides information about the principles of the infrared transfer technique used and interface technology, which you can use for your own projects.Infrared data transfer is becoming increasingly more important. Television remote controls use infrared light, but so do PC mice, keyboards, printers and other peripherals. Infrared light is also used in fibre-optic cables. In a sense, the PC infrared transceiver presented here is a practical application that represents a continuation of the series of articles on PC interfaces and Visual Basic that appeared in the ‘PC Serial peripheral Design’ course (Elektor Electronics 9/2000 through 3/2001).

Resistors:
R1,R2,R5 = 4kOhm 7
R3 = 100kOhm 
R4 = 470Ohm 
R6 = 27kOhm 
R7 = 1kOhm 
R8 = 22Ohm 
P1 = 2kOhm 5 preset
Capacitors:
C1 = 4µ F7 25V radial
C2 = 100nF
C3 = 10nF
C4 = 22nF
C5 = 1µ F 25V radial
Semiconductors:
D1,D2,D3,D6,D7 = 1N4148
D4,D5 = IR-LED, e.g. LD271
T1,T2 = BC547
T3 = BC337
IC1 = 78L05
IC2 = 555
IC3 = TSOP1836, SFH506-36
Miscellaneous:
K1 = 9-way sub-D socket (female), angled pins, PCB mount