No, I don't have one. Would this be helpful, what's your thinking?
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Getting G3 Whisper Perch USB working
- Thread starter croissantking
- Start date
If a problem is suspected with device power draw (a perch card USB power output issue) having a powered USB hub would mean hub connected devices would would not pull USB power from the perch card USB port (instead from the hub's power supply). Might validate the data/signaling portion of your work is right?
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Just ordered one off eBay
Fingers crossed it helps with debugging!Just ordered one off eBay
I’m waiting on a few things to arrive:
- SMD oscillator
- Component tester
- Polyfuse similar to the 30R090
- Powered hub
- SMD oscillator
- Component tester
- Polyfuse similar to the 30R090
- Powered hub
New oscillator and polyfuse fitted tonight. Looks tidier.
I removed the diode at D2, since I don’t know what value it should be, which way round it should go or if it’s actually needed. The card seems to operate the same without it.
Maybe a thyristor goes there.
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Awesome progress so far!! In case you're after one - https://www.ebay.co.uk/itm/125843022879
Scanner now working, USB CF card reader now working.
I removed C146 and C144 (incorrectly labelled C2 on my schematic).
I removed C146 and C144 (incorrectly labelled C2 on my schematic).
Dremel duty done
With the backplate fitted it seems to be the case that plugging in the previously offending hard drives no longer results in sudden restarts.
I need to do more testing before I can say this is fully working, but it certainly seems pretty damn functional.
Anyone else going to have a go? There’s also the soft power circuit to look at if anyone’s keen.
I need to do more testing before I can say this is fully working, but it certainly seems pretty damn functional.
Anyone else going to have a go? There’s also the soft power circuit to look at if anyone’s keen.
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Have you tried to see what happens if you press the power button on a USB keyboard that has one?
Yes — nothing.
I’m interested in trying this! I was looking at the cards I have (one installed, 1 backup), both are the AV variant. However, after looking close they are completely different layouts. One appears to have the space for the USB controller chip, the other doesn’t. I’ll get some photos and part numbers uploaded here later today.
Definitely tempted!! Do you have a cheat sheet with everything that's needed?
Yes - the last version of the schematic I posted on here, on page 10 I think, but it needs updating again. I could put together a Mouser BOM for anyone interested.Definitely tempted!! Do you have a cheat sheet with everything that's needed?
Yes, sure, we could work out a deal on this....and would you entertain providing an "upgrade" service?
Cool, will drop you a PM.
