Circuit conversation - X-Core v. PCC-1200i

[rmackinnon]

Moving conversation from closed issue to this thread to no bother the others on that thread.

[rmackinnon]

@gashtaan sorry to disappoint, but mine is not a modular unit. Mine has 12 static station terminals plus a common. I didn't think that I need the ability to expand my 9 zone need to some crazy number of valves. My general feeling, based on the the design in your schematic and what I've seen on my unit, there was no reason for them to redesign the circuit if they just needed to change the form factor. On the facepack, broad strokes seem to be they just moved stuff around and rerouted the PCB splitting up the valve control and the timer into the valve controller and facepack. There is a chance that in other versions (which do contain modules) the valve controller is a reworked circuit.

[rmackinnon]

@gashtaan Finished the initial schematic. There is some guess work to do there still. Cap values, some of the MCU lines to match up, and an educated guess on the non-populated devices, but solid idea of what is going on is there. Reverse voltage hurts my brain. I need hit this with a conductivity probe and see where things line up on the MCU for what I'm calling the enable lines.

There are some very interesting things going on for the additional control lines to allow for a zone to specifically be enabled via the Facepack (See signal CH_4_EN). I have no idea why they do this. Other non-populated devices would also allow for zones 1-3 to be controlled via the Facepack. Which I'm guessing aligns with the X-Core 4 zone?

[gashtaan]

@rmackinnon in X-Core units, there are few variously populated (pull up/down) resistors on IO pins of the MCU, their combination is recognized by the firmware to configure count of zones that the device support. I guess that EN signals you are following can be something similar.

[rmackinnon]

From what I can tell the EN signals all seem to be lines out from the MCU (or Facepack) that I believe are used to activate the zone. There may be something like this on the facepack board. I'll work on that one next.

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On Sat, May 13, 2023 at 3:33 AM Michal Kovacik ***@***.***> wrote: @rmackinnon <https://github.com/rmackinnon> in X-Core units, there are few variously populated (pull up/down) resistors on IO pins of the MCU, their combination is recognized by the firmware to configure count of zones that the device support. I guess that EN signals you are following can be something similar. — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA4ERPLY5ZCGBVYPGO26XVDXF5PQ5ANCNFSM6AAAAAAXZAU62U> . You are receiving this because you were mentioned.Message ID: ***@***.***>