Brother TC-225 / TC-229 adventure!

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02 Aug 2017 13:38 #96905 by ihavenofish
that ebay relay does the same thing as mine! haha. all the inputs to ground.

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02 Aug 2017 13:40 #96906 by ihavenofish


The 5i25 has a second header. You can add a 7i74 to that and have eight more smart-serial cards. That should be plenty.


more money haha. well, more time really. from memory it takes a good week or more to get anything from him IF he has it on had. my 7i76 took months.

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02 Aug 2017 13:48 - 02 Aug 2017 13:52 #96908 by andypugh

that ebay relay does the same thing as mine! haha. all the inputs to ground.


No, it has a set of switch-to-ground outputs and 24V positive voltage inputs.

No, that's wrong. Sorry.

I think I have seen positive-voltage input versions.
Last edit: 02 Aug 2017 13:52 by andypugh.

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02 Aug 2017 13:51 #96909 by ihavenofish
sure doesnt look like it, in any case, its wired identically to what I have already.

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02 Aug 2017 13:58 #96910 by ihavenofish
heres a nice drawing of what I have now
Attachments:

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02 Aug 2017 13:59 #96911 by andypugh
Actually... This is a job for the ULN2003, and those are cheap. (25p)

docs-europe.electrocomponents.com/webdoc...0900766b8135f9fb.pdf

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02 Aug 2017 14:17 - 02 Aug 2017 14:39 #96913 by ihavenofish
that interesting. but I'm slightly confused (as always haha)

so, on one of those, id connect "IN1" to the mesa output. "GND" to the mesa field ground. "OUT1" to the minus terminal of the relay, and then common to the 24 ground of the machine (also the same 24 ground that's connected to field io on the mesa)

that's seems... right? looking at the diodes in their block diagram anyway.

with 7 channels, I could basically patch this into my cable and shrink wrap it. and add one or 2 more as needed for other relays in future.

also 75 cents at mouser with next day delivery. woo.
Last edit: 02 Aug 2017 14:39 by ihavenofish. Reason: fixed to make myself look less stupid

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02 Aug 2017 14:19 #96914 by ihavenofish
haha, $20 shipping. sigh

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02 Aug 2017 14:25 #96915 by ihavenofish
well, its on its way - I ordered 4. now I can twiddle my thumbs for a few days.

actually, I guess I can try to read some of the inputs and see where they end up..

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02 Aug 2017 16:06 - 02 Aug 2017 16:06 #96920 by andypugh

haha, $20 shipping. sigh


I have a tube of them, but that's no help for you.

You could have tried Amazon or eBay:
www.amazon.com/dp/B00CL7X2IM/
Last edit: 02 Aug 2017 16:06 by andypugh.

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