Article
Add-on Switch Unit for R/C Mo-dels
Provides two switches at 30 A
This switch unit is designed to drive two extra functions in a model via a switch-channel on the transmitter. A soft start function is provided on one of the channels for turning on electrical motors smoothly. The correct control signal and the supply are derived from the receiver in the model.Radio controlled boats become a lot more interesting when, apart from the standard control functions, a few other functions can be controlled remotely. Most of you will be able to think of a few examples that would be useful. The simplest implementation is with a couple of micro switches that are actuated by a servo.
Materials
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.
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PCB
Component list
Resistors:
R1 =10k?
R2 = 8k?2
R3,R4 = 1k?
Capacitors:
C1=100nF
C2=220pF
Semiconductors:
IC1=PIC16C712-041/SO, programmed, order code 020126-41
T1-T4= IRLR3101 (e.g., Farnell # 738-372)
Miscellaneous:
Servo cable
PCB, order code 020126-1
Disk, hex and source code files, order code 020126-11 or Free Download
R1 =10k?
R2 = 8k?2
R3,R4 = 1k?
Capacitors:
C1=100nF
C2=220pF
Semiconductors:
IC1=PIC16C712-041/SO, programmed, order code 020126-41
T1-T4= IRLR3101 (e.g., Farnell # 738-372)
Miscellaneous:
Servo cable
PCB, order code 020126-1
Disk, hex and source code files, order code 020126-11 or Free Download
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