The Max1615 is shown set to be a 3.3V regulator, so I believe that should be a 78L33, not a 78L05.
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Getting G3 Whisper Perch USB working
- Thread starter croissantking
- Start date
Ooooh!
Swapping in those other caps got it going!
What a great team effort.
I couldn’t actually find any 47pf caps, so I used 200/300 pf ones, but it seems they were close enough.
I’ll have to do some testing - it might not be fully reliable yet.
What a great team effort.
I couldn’t actually find any 47pf caps, so I used 200/300 pf ones, but it seems they were close enough.
I’ll have to do some testing - it might not be fully reliable yet.
I'll order one... but... just wanted to ask, how would you test those tiny SMD caps? Do you solder it in somewhere? Because the pictures show through-hole components being tested.@croissantking
I recommend getting one of these :
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It will help you work out what the caps and inductors are.
OMG! Awesome!!! Congrats guys!
So my initial tests are that the keyboard works perfectly, but plugging something into either of its powered USB ports causes the keyboard to stop working. Unplugging the extra device allows the keyboard to come back to life.
A Logitech USB receiver and mouse almost works perfectly, but some of the clicks are lost - the mouse pointer has to be moving for the clicks to register. There seem to be errors building up in the log as this happens.
A USB CF card reader is detected but won't mount my CF card.
A USB Scanner is detected, but won't work.
There also seem to be some issues with unplugging one device and then plugging in another and the USB bus hanging, requiring a restart.
I think we just need to work out the values of those other caps now.
A Logitech USB receiver and mouse almost works perfectly, but some of the clicks are lost - the mouse pointer has to be moving for the clicks to register. There seem to be errors building up in the log as this happens.
A USB CF card reader is detected but won't mount my CF card.
A USB Scanner is detected, but won't work.
There also seem to be some issues with unplugging one device and then plugging in another and the USB bus hanging, requiring a restart.
I think we just need to work out the values of those other caps now.
Thanks! Yes, it is awesome!
Does this offer a clue as to the value of C113?
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If this refers to the caps around the USB chip that are connected to its VCC and VSS pins, I'll need to double check them as I've used 0.1uf on all of them but some need to be 10 uf.
I know it needs refining still, but this is very cool to see. Nice work!
You push them down on the pads that look like a SOT package regulator, or put jumper wires in the socket.
Congratulations
I need to find a layout as well, which I think is what Cheesestraws found. To see where those caps go.
Wow! You did it !!
Congratulations !!
What a thrilling adventure !
Congratulations !!
What a thrilling adventure !
Yes, there's a PCB layout also on that page for an example 2-port USB card. Unfortunately in orcad format and I don't have anything that can read that.
What're the errors?
Friend opened the archive, looks like another version of the schematic.
Yup, just spotted them. Here is the top silkscreen for component placement W.R.T. the schematic. We should have everything, differences from the reference design aside.
