Products > Test Equipment
open source GPIB adapter
dazz1:
--- Quote from: intabits on July 04, 2023, 08:44:24 am ---
--- Quote from: dazz1 on June 24, 2023, 06:36:29 am ---I now have the parts and the PCBs, but not enough time to assemble yet.
--- End quote ---
Have you assembled and tried one yet?
I'm currently designing an adapter PCB for this same connector, and as far as I can tell, your connector is arse-about.
You would need to mount it to the bottom of the PCB shown in reply #61.
Or is it me that has it wrong?
All these have DIO1 at top-left when looking into the connector with the wide side at the left. And that would also go to the top-left pad on your PCB, but your DIO1 is at the bottom-left!?
I was just about to send my design to JCLPCB after a final check, but now I'm confused....
--- End quote ---
No haven't assembled mine yet. Nor did I check the connector pin-out before I sent my Gerbers out.
I started by copying other PCB designs. If I am wrong, so are they. I have checked the pin numbers on the connectors I have. My PCB is OK. Pin 1 marked on the connector puts it on the bottom left.
The boards I have are for lead-less devices. A little challenging to solder, but I have a hot air station.
I have redesigned my PCB to use a leaded flat pack type package for the MCU. The PCB is just a few mm deeper, but still very small. I have not had this PCB version made.
intabits:
--- Quote from: dazz1 on July 04, 2023, 09:49:43 am ---My PCB is OK. Pin 1 marked on the connector puts it on the bottom left.
--- End quote ---
Yes, same on my connector. I was following signal names rather than pin numbers.
Two of the links in my previous post appeared to be views of cable plugs looking into the mating side, but these are piggy-back, and the views were looking into the female side of them, it seems. (Or looking through the adapter to the instrument connector)
Someone else had similar confusion, but provided a definitive diagram:-
https://www.eevblog.com/forum/projects/ar488-arduino-based-gpib-adapter/msg3379350/#msg3379350
Thanks for helping clear this up.
(Now back to my orginal PCB version for JLCPCB)
rhb:
Out of curiosity, what about the AR488 by WaveyDipole? Why would you not use that and the Uno R3 shield @artag designed so you can plug a 24 pin IDC cable on into the shield and attach up to 10 GPIB devices using IDC Centronics coonnectors.
There is a very long thread about it on this forum.
In any case, the price of name brand GPIB adapters that aren't fakes is ridiculous. So another design is always useful. Thank you.
Have Fun!
Reg
TheDefpom:
If this works OK I might be interested in one Darren, but I can only scrape together $88,666.42, I hope that is enough.
dazz1:
--- Quote from: TheDefpom on July 05, 2023, 03:13:50 am ---If this works OK I might be interested in one Darren, but I can only scrape together $88,666.42, I hope that is enough.
--- End quote ---
I wouldn't normally accept that amount for payment.
I usually require at least a 10% deposit. >:D
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