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FM Remote Control Transmitter

FM Remote Control Transmitter
This extremely simple transmitter, consisting of only an encoder IC and a 433 MHz licence-exempt TX module, was designed to remotely switch simple appliances on and off. The associated receiver has a relay that can be switched permanently or momentarily and is suitable for various applications (including mains).
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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 = 1M?
Capacitors:
C1,C2 = 100nF ceramic
Semiconductors:
IC1 = HT12E (Holtek)
IC2 = T5-434-5-50 R.F. Solutions (Farnell # 352-4371)
Miscellaneous:
S1,S2 = solder bridges
PCB: see ‘FM Remote Control Receiver’
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