This model robotic car is programmed via a PICAXE 28A chip 168F72 with Basic language.
“Continue reading” for more details and photos.Transfer of the program is via a serial cable output. It is simple enough for kids to be able to program. The 4 MHz development board has 8 outputs buffered on board by a darlington driver chip ULN2803A and a L293D motor driver chip. There are 8 inputs and 4 analogue inputs as well. It all runs on 4.5 V. There is a 256 line limit and 15 gosub limit

Mechanically it has two independent rear motors and a front castor (a small furniture one) all mounted on a 23 x 17 cm acrylic chassis.

So far it has inputs of 2 switches and a light dependent resistor and outputs of two motors and two LED’s.  It has been programmed for a variety of simple routines involving movement and steering depending on a light being shone on it.

Related pages

  PICAXE microcontrollers

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External links

Robotic cars – the real thing – Wikipedia

Photo Date: 2005