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Home › Magazines › 2005 › July › RF remote Control Extender (Receiver)

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RF remote Control Extender (Receiver)

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Published in issue 345, July 2005

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.

Components

Relevant products

Resistors:

R1,R2 = 10k

R3 = 47

R4 = 1M

R5 = 18

R6,R7 = 100

R8 = 470

P1 = 10k preset

Capacitors:

C1, C7,C8 = 100nF ceramic

C2 = 100nF MKT

C3,C4 = 33pF

C5 = 15pF

C6 = 220µF 25V radial

C9 = 100µF 10V radial

Inductors:

L1 = 10µH

L2 = 47µH

Semiconductors:

D1,D2 = LD271

D3 = LED, red, high-efficiency

T1 = BC547B

T2 = BC639

IC1 = 74HC4060

Miscellaneous:

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

Click below to download a PDF copy of this article from Elektor magazine.

 

Downloads 
PDF Article (054014-UK.pdf)
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PCB layout (054014-PCB.pdf)
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Order from Elektor 
PCB, bare
054014-1
 

Order from Eurocircuits 

PCB, bare
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

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