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Twisted Pear Superior quality electronic kits

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Old 27th June 2017, 05:01 PM   #91
torb is offline torb  Finland
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Join Date: Aug 2014
Getting back to this great project, I have been able to troubleshoot a bit:

Following the clock signals from Cronus and clock select pin from the BBB it seems the isolators are doing far to good a job by blocking all signals.

The voltage across their decoupling caps is ~3,4 V on the BBB side but only about 1,3 V on the Cronus side.
Same 1,3 V across decoupling caps on Cronus board.
Lab-PSU is steady at 5 V. I disconnected the BBB and removed the clocks, still 1,3 V.

So, I suspect the regulator on the Cronus and would try to replace it.
Is this IC5 which is marked 715102?

Would this be the one to order:
http://www.mouser.fi/ProductDetail/A...Mjy9blLOYc4%3d

Best regards,
Tor-björn
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Old 29th June 2017, 07:58 PM   #92
torb is offline torb  Finland
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To answer my own question: Brian from Twisted pear contacted me quickly, I had gotten a Cronus from a batch with the wrong regulator and he offered to send a replacement unit. Really good customer service!
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Old 10th July 2017, 03:47 PM   #93
torb is offline torb  Finland
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And it works=)
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