Quote:
Originally Posted by danstar10
...bojan - i have had someone offer to program the PIC for me for the linestepper I posted- I guess that is what you are referring to? Seeing as I can buy that kit for $35 and it has everything in it I need to assemble it minus the motor and power supply I would be tempted to go with that. Are there any advantages to the design you are proposing?
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If you have someone to help you with programming then go for it.
There is no real benefit with my design.. as I mentioned, I did it this way only because I still have those particular processors in some quantities.
However, maybe you can consider slight departure from the linestepper approach:
Have a look at this
little motor with driver (The same I used on my EQ3)
This is only a driver, so you need processor board (
this one or
this one, it is similar).. you can even place ULN2003 chip (from motor driver board) on it, and this will be only necessary soldering work to be done, otherwise you can just use connectors and ribbon cable to connect them together.
This approach may be cheaper, and modular enough - so you can use it later for more serious projects (to add hand pad, or DEC motor.. it will be easy, you just have to be good to your friend the programmer

)
Let me know what you think and I am willing to help you further with advice.
EDIT:
I found
another one on ebay.. this is complete, assembled board with PIC controller, with STEP-DIR input (not sure which processor - please check with your friend). You just need to put in your own firmware. There are heaps of them on ebay, pretty cheap - see
here for another one.