Tag Archive: robot controller



Chippu has now upgraded its hardware, and is now much smarter. The Atmega32 is replaced by a more powerful and feature rich Atmega128 based Wiring Board. It has  53 I/O pins, 8 analog inputs, 2 hardware serial ports, 6 PWM (analog outputs), SPI, TWI, 8 external interrupts pins. Also it can drive a maximum of 24 servo motors. Quite impressive. A motor control board based on L293D was also added. Here are a few shots.

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I was using an Atmega32 based Arduino  clone for the low level hardware control of  my personal robot Chippu. But soon ran  into problems  as the code size increased and  the inbuilt RAM of 2kb overflowed often, and it caused the ROS node running on Arduino to go out of sync. Also I needed to drive about 16 servo motors , and my Arduino permitted only a maximum of 12.  So the only alternative was to go for a powerful Arduino Mega 2560.

Wiring Board V1.0

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Robot Operating System (ROS) is a software framework for robot software development, providing operating system-like functionality on a heterogenous computer cluster. It can be called a meta operating system and its development continues primarily at Willow Garage. The latest version of ROS is ROS Electric Emys.

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I got a pair of old robot controller boards based on 8051. It could drive four DC motors through its two L293 H-Bridge drivers, a 16×2 character LCD, an RS232 port and plenty of IO pins.But it was based on an  old 8051, and that could be the reason that someone discarded this board in a junkyard.

Robot Controller Board

Robot Controller Board

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