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Remote Light Control with Dimmer

Responds to RC5 infrared commands

Remote Light Control with Dimmer
The microcontroller-driven switch described in this article allows one lamp to switched on and off as well as dimmed, all using an RC5-compatible infrared remote control.There is a great deal of lavishness in being able to switch a lamp on and off without getting out of your chair, and even more in brightness control from the same comfortable position! A small microcontroller circuit makes it all possible. As a bonus, the circuit provides a soft start / soft turn off function, which means that the lamp is switched on and off gradually rather than abruptly.
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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,R2 = 47kOhm
R3 = 1kOhm
R4 = 150Ohm
R5 = 8kOhm2
R6 = 10kOhm
C1 = 220µF 25V radial
C2,C5 = 10µF 16V radial
C3,C4 = 100nF
C6,C7 = 33pF
B1 = B80C1500 (round case, 80V piv, 1.5A)
D1 = 1N4148
D2 = LED, low current
IC1 = 78L05
IC2 = AT89C2051-12 (order code 020337-41)
IC3 = CNY65
IC4 = S202S211
K1 = 3-way PCB terminal block, lead pitch 7.5mm
K2 = SFH110-36, TSOP1836 (see text)
S1 = pushbutton, 1 make contact
Tr1 = mains transformer, 6V 0.35VA (e.g., Hahn BV2010106)
X1 = 12MHz quartz crystal
F1 = fuse, 2AT (time lag), with PCB mount holder and cap
Disk, HEX and source code files, order code 020337-11 or Free Download.
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