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R/C Surveillance Robot
Click to enlarge
This is an R/C surveillance robot project I defined recently. It is devided into two main parts: the Robot
and the Remote Control. For the robot, a used treaded truck toy chasis has been selected and been modified
with new two dc geared motor obtained from another used car toy. A Lithium-Ion battery package with
14.8 V / 2.2 A is used for powering the robot. A control board designed based on Atmel
Atmega8 AVR
microcontroller and
L298 dual full-bridge driver.
Click to enlarge
The control method of the motors is based on Pulse Width Modulation (PWM). The full-bridge driver lets drive them in both directions, forward and backward.
A small 1.2Ghz wireless camera is mounted in the top of the robot to survey the area. A
RFM12 RF
data link from HOPE RF is used to connect the
control board on the robot to the remote control unit.
Click to enlarge
For the remote control, a used R/C box of a toy
is selected for rapid mechanical inplementation. The remote control board is based on the Atmega8 and
RFM12 RF data link module. A potentionmeter is used for steering. The A/D of the Atmega8, reads the
potentiometer voltage and converts it to a binary value. An algorithm combines the key Forward / Backward
and the potentiometer value, and then sends it to the control board of the robot via RFM12 module.
Author: Rasoul Mojtahedzadeh
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