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Remote Control using RF (transmitter)


Remote Control using RF (transmitter)
These days, transmit- and receive modules that operate on the well-known 433-MHz licence-free frequency are reasonably cheap and freely available at electronics stores. The circuit described here makes use of the transmitter/receiver combination available from Conrad Electronics, which stands out because of its low price. A disadvantage with this setup is the available bandwidth. At 2 kHz this is quite limited, but still sufficient for our purpose. We assume that the RC5 remote control system from Philips is being used.
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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.

R1 = 100
R2 = 4k7
C1, C3 = 100µF 10V radial
C2 = 100nF ceramic
L1 = 10µH
D1 = zener diode 5V1 0.5W
T1 = BC547B
IC1 = SFH5110-36
S1 = miniature slide switch SX254 (Hartmann) (Conrad Electronics # 708062) or 3-way pinheader with jumper
MOD1 = 433.92 MHz AM transmitter module from Conrad Electronics set, # 130428
PCB, ref. 054013-1
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