# Circuit experts stop in please.

**URL:** https://forums.speedlife.net/t/circuit-experts-stop-in-please/253974
**Category:** Shift518 Off Topic
**Created:** [August 15, 2010, 8:20pm UTC](https://forums.speedlife.net/t/circuit-experts-stop-in-please/253974 "2010-08-15T20:20:40Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![Boxersix](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/boxersix/32/6327_2.png) [@Boxersix](https://forums.speedlife.net/u/Boxersix)
#### Post date: [August 16, 2010, 3:30pm UTC](https://forums.speedlife.net/t/circuit-experts-stop-in-please/253974/3 "2010-08-16T15:30:19Z")

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> [@Anyone on here work at an autoparts store??](https://forums.speedlife.net/t/anyone-on-here-work-at-an-autoparts-store/34387/2):
>
> I’d like to do this but just dont see having the time, and I’d have to refresh my mind on the coding necessary as it’s been a while.
> 
> But let me understand what you are trying to do here…  
> -Three output channels controlling three motors?  
> -What kind of environment is this in?  
> -What kind of precision is required?  
> -I’d use stepper motors over encoder wheels, all that you’ll need than will be limit/home switches.  
> -You are probably looking at having 6-7 input channels for position feedback and some type of push-button control switch.

-Yes three outputs controlling three separate motors. Channel one doesn’t even necessarily have to be a stepper circuit. Could just be a reversible DC current driver for a 12-18v motor, limited by aforementioned limit/home switches and activated by a momentary switch. channels 2+3 however would have to be stepper.  
-The controller would be subject to ambient temp+dry, but if possibly to pot the circuit and use an external finned thermal sink to make it water resistant… again another benefit.  
-Precision…If you mean precision by increments of movement, then i’d say 1/16th" is more than acceptable for the application. This doesn’t require .001" accuracy.  
-Stepper motors would be ideal, as I can get fully sealed units that would be possibly subject to some moisture.  
-This is your realm, if you say 6-7 inputs then 6-7 inputs it is 🙂

This is not something I’m in a rush for. I’m looking to find someone who may be able to build it over the next 3-6 months now, rather than waiting until I do require the piece.

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