# Ex controller schematics

**URL:** <https://forum.avidcnc.com/t/ex-controller-schematics/4164>\
**Category:** General Chat\
**Created:** [January 1, 2025, 5:52am UTC](https://forum.avidcnc.com/t/ex-controller-schematics/4164 "2025-01-01T05:52:47Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![Eric](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/eric/32/3220_2.png) [@Eric](https://forum.avidcnc.com/u/Eric)\
**Post date:** [January 2, 2025, 9:48pm UTC](https://forum.avidcnc.com/t/ex-controller-schematics/4164/9 "2025-01-02T21:48:51Z")

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> [@berrianmtn](#):
>
> I got the Centroid probe but haven’t started using it yet – I intend to use it with probe detect on a re-wired aux 4.

Good choice.

> [@berrianmtn](#):
>
> (the one with the relay board attached) is still a bit of a mystery.

The schematics will definitely help. There’s not a ton of magic in that board. It mostly just passes signals around to avoid wiring soup:

 ![image](https://canada1.discourse-cdn.com/flex027/uploads/avidcnc/original/2X/4/4f1e966d8e1d176f6c1a79dff07f9dd55d8905f6.jpeg)

That box is the original prototype that I built (and am still running) As you can see there’s a ton of wires in there that the “interconnect” board eliminates.

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