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Radio Controlled Multi-Switch

Control 5 switches via 1 channel

Radio Controlled Multi-Switch
A proportional radio control is ideal for controlling the speed and direction of model cars, planes or boats. Unfortunately, there are often very few facilities for switches on such controllers. With the help of this circuit you can control five switches using just a single channel.
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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.

Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
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Component List
R1 = 33kOhm
R2–R7 = 10kOhm
R8 = 0Ohm (jumper)
P1 = 10kOhm trimpot
C1 = 4.7nF, 0.1” pitch
C2 = 1nF, 0.1” pitch
C3–C7 = 47µF 50V, 0.1” pitch
C8,C9,C10 = 100nF, 0.2” pitch
C11 = 1000µF 50V, 7.5mm pitch
C12 = 470µF 50V, 0.2” pitch
D1–D5 = 1N4148
IC1 = HEF4093BP
IC2 = CD4017BE
IC3 = ULN2003AN
IC4 = MC7805
K1–K6 = 2-way PCB terminal block, 3.5mm pitch
K7 = 3-pin pinheader, 0.1” pitch
RE1–RE5 = relay, SPST, 5V coil, 5A contact, e.g. Omron G5NB1A5DC
PCB, Elektor Store # 140088-1

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