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Shot of the computer's screen. Once wired, I fired up the 8052 computer and ran a quick little program to test the computer (BASIC program that converts F to C).
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Ribbon cable connecting the computer board to the controller board.
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The controller board with the motor control transistors.
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Close up view showing the six transistors for the 2 motors.
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The motor controller power transistors. There are 4 for each motor. They form a bridge and eliminate the need for a relay to switch directions.
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The circuit "all over the place" during the bread board stage.
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You can see the 2 sets of 4 power transistors for the motors as well as the fuses.
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Bottom view showing the control board location and edge connector with the motors running.
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Finished 8052 CPU board with other circuitry.
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Next an 8255 was added to the controller board to help control the sonar unit and bumper detection. Notice that a DB25 connector is also needed besides the board edge connector.
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The finished wiring of the CPU board. Over a 100' of wire is here.
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Top view looking down showing the space between the CPU board and battery pack.
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The CPU board is mounted vertically at the end of the chassis, behind the battery pack.
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The sonar unit is mounted above to shoot over the front of the robot.
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Close up view of one of the bumper switches.
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Looking down at the front showing the front bumper after it has run into a few things.
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See a short video of one of the first test runs of Mikey's sonar circuit.
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