• on Miscellaneous Electronics
  • Published in issue 12/2003 on page 0
About the article

Small RC4 Transmitter

Small RC4 Transmitter
We have published many articles in past issues of Elektor Electronics about IR data transmission using the Philips RC5 code. A prerequisite for these using these circuits has always been an RC5 remote control made by Philips or Loewe, or else a ‘home-brew’ RC5 transmitter based on the SAA3010 encoder IC. Philips has now officially discontinued its RC5 encoder, effective the end of last year. Nevertheless, it does not appear to be difficult to obtain small quantities of this IC from existing stocks — and that could remain true for some time to come.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Resistors:
R1 = 100?
R2,R3 = 1?5
R4 = 1k?
R5 = 6k?8
Capacitor:
C1 = 100µF 16V radial (low profile)
Semiconductors:
D1 = LED, red, 3 mm
D2 = LD274
T1 = BC517
IC1 = SAA3010 (see text)
Miscellaneous:
BT1 = two 1.5V batteries with holder
S1-S10 = pushbutton, PCB mount (e.g. ITT/Shadow D6)
X1 = 429kHz 2-pin ceramic resonator
JP1 = 3-way pinheader with jumper, or wire link
JP2 = wire link
S11 = 8-way SIP switch
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