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RF remote Control Extender (Receiver)


RF remote Control Extender (Receiver)
This circuit works together with a transmitter described elsewhere in this issue to form a remote-control extender. Due to its limited bandwidth, the output of the RF receiver module does not exactly reproduce the original pulses from the IR receiver. That problem is remedied here by the circuit around T1. The modulator circuit for the data received from this stage is active low, so the primary function of T1 is to invert the received signal.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD 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.

Component list
R1,R2 = 10k
R3 = 47
R4 = 1M
R5 = 18
R6,R7 = 100
R8 = 470
P1 = 10k preset
C1, C7,C8 = 100nF ceramic
C2 = 100nF MKT
C3,C4 = 33pF
C5 = 15pF
C6 = 220µF 25V radial
C9 = 100µF 10V radial
L1 = 10µH
L2 = 47µH
D1,D2 = LD271
D3 = LED, red, high-efficiency
T1 = BC547B
T2 = BC639
IC1 = 74HC4060
J1 = 14 (2x7) way pinheader + 1 jumper
X1 = 18.432MHz quartz crystal
MOD1 = 433.92MHz AM receiver (RX) module from set, Conrad Electronics # 130428
PCB, ref. 054014-1
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