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Oy vey! I've had my share of headaches, boo boos, and downright failures on this project. Such as:
- Frying a CEM3310 transient generator chip due to a solder bridge tying the V+ line to pin 17. That's why I use sockets now and check and
recheck for bridges.
- PCB's that for some reason the photoresist doesn't develop correctly, leaving a thin film of the green stuff. When etching, you get spots
of copper where you don't want it. A couple I had to junk, and three I've repaired with an Exacto knife and a Dremel tool (grind, grind!)
- My fancy Psuedorandom noise source didn't work right - it has a very detectable pattern at about 8khz. Which is wierd, because I used the
same circuit on my original OGEE.
- On the same Psuedorandom noise source, I forgot and put it on a single sided board - although it should have been double sided. That's
fixable though; you just solder in wires for the top traces.
- Fried two +5v, +/15v switching power supplies I got cheap (under $10 for both) from ebay. Bought two more, but they cost me $22. I
was originally going to use one in og2, but then took a good look at the periodic HF on the ground line, so I designed a linear supply. Also picked up
up a couple of Power One linear supplies from ebay.
- Misplaced parts, misplaced drill bits, misplaced tools. My work area is rather cluttered (heck, my whole garage is cluttered!)
- Misaligning some of the drilling templates for the front panel. Then, of course, when I placed the front panel labels I either had to
have the modules leaning, or offset the jacks and pots a bit from the panel artwork.
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