[fpc-pascal] FPC embedded ? (going slightly off-topic)

[Paulo Costa]

On 05/03/2015 19:28, Ewald wrote:
>
> On 05 Mar 2015, at 19:57, Adriaan van Os wrote:
>>
>> It's a very smal project but I do need to drive one or two stepper motors. What I learnt is that that the board does the controlling and that there is a separate chip for driving the motor, e.g. for stepping and microstepping ?
>
> Stepping and microstepping can easily be implemented in the microcontroller itself, like you say. The reason you need an extra chip is the need for some power transistors arranged in a bridge configuration, something similar to the L298 or L293D, to name some popular IC's.

While stepping and microstepping can be implemented in the 
microcontroller itself, there ICs that do that and the power driving.
They are very popular in 3D printers and you can buy a board where you 
only have to give the (micro)steps and the direction.
Search, for example, in ebay for A4988.

Paulo Costa