Robin Bowes wrote:
Michael Amster wrote:
Well, yes - I need an oscilloscope and do not own one. I am sure that my 3 PSUs are working as designed (+5V digital, +5analog and +-15v analog).
+5 analog? What's that for? As far as I could see, the DI/O requires +5V for the digital board and +/- 15V for the analogue circuitry.
Jean-Paul pointed out that J1-3 is actually an Analogue +5v signal - check the thread on the DIO list to which we both subscribe - just look for Borde or Amster - you will see an email where he goes through every input and tells what he is doing on his project. Hmm. I will try wiring it to the same PSU as my digital +5v to see if that is an issue....anyway he insists that it makes a big difference in how the board sounds - also a big fan of the higher quality bypass caps on the digital board - hence my Blackgates (cheap at this size). I will plug at it as my wife now thinks the project is an eyesore in our home office :)
I am pretty sure that my digital board is getting all the
right signals, however I have no way to know if it is locking on the input signal. I can try swapping in another digital board (I have two - one vanilla and one with clipped leads - mistake and modified with blackgate caps) to see if it changes things, but so far, no go. One thing that does seem to matter is grounding - do not ground your digital PSU back to the same ground plane as the analog one. However, other than that, I do not know my issue keeping it from being done. I was hoping that Jean-Paul Borde would help me out with some suggestions, but I am stuck at the moment.
Well, keep me posted. I'll let you know how I get on, but it's likely to be months before I get chance as I'm moving jobs/house at the start of March.
Good luck!
R.
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