The SV203 RC Servo Motor Controller is a Microchip PIC16C73 microcontroller based servo motor controller board. It accepts RS232 serial data signal from a host computer and outputs PWM (pulse width modulated) signal to control up to eight RC servo motors (servos used in radio-controlled model airplanes, cars, etc.). Unused servo pins can be reconfigured for digital output to drive on/off devices.

A 5-channel, 8 bit A/D input is available to read analog voltages between 0 to 5 Volts. Devices such as an analog joystick or potentiometers can be connected to this port and the position can be read by the PC and sent back to the board to control the servo position.

The SV203 RC Servo Motor Controller processes commands sent by a host computer connected to the serial port. The commands are ASCII character strings that select the board, tell which servo to control, and the position of the servo.


# Controls 1 to 8 servos per board 8-bit resolution, value from 1 to 255,
# under one degree of servo position precision resolution
# Servo port can be reconfigured for digital output to drive on/off devices.
# Source/Sink 25 mA per pin
# Interface to PC through RS232 Serial port (2400 to 19200 baud).
# User definable board ID number (allowing multiple board to share same serial line).
# 5-Ch, 8-bit A/D input port for reading 0 - 5 Volts. (Control servo positions via Joystick/Pot)
# Dimensions: 1.4 in X 1.7 in
# Servo Connectors: 3 pin sip. Futaba J-type connectors.
# Power supply: 7V (Up to 15V, but excessive voltage may damage servos)