Talk about and 0-fer in DIY FX (a.k.a I need help)

[pbrommer]

Dear lord what is the matter?

I need some help troubleshooting a couple projects. Man, am I frustrated!  :twisted:  :twisted:

Anyways, here's the two links:

http://www.geofex.com/PCB_layouts/Layouts/easyvibe.pdf
AND
http://mysite.verizon.net/imagelib/sitebuilder/misc/show_image.html?linkedwidth=actual&linkpath=http://mysite.verizon.net/res0o2zg/sitebuildercontent/sitebuilderpictures/hmp_rat_ver.gif&target=tlx_new&title=Click%20On%20Thumbnail%20To%20open%20Full%20Size

Here we go (both are on PCBs and both bypass signal just fine):
1) Easyvibe has LED 5 and 6 lit up, but nothing coming out of the circuit. Double-checked the offboard wiring. I put a 5mm in to check to see if the LED/LDR areas were blinking, but I was getting nothing at all. Where might I look first?

2) HMP -- did the offboard wiring, and nothing coming through. I think pins 1-4 aren't getting the right voltages of opamp 1 -- they look WAY low. opAmp 2 looks to be just fine. Where to start?

I am so very glad this place is up. Maybe I can get these damn things working and look better than Nebraska did today playing Pitt (what a godawful game).

Thanks guys --- Patrick

[pbrommer]

completely ignore the above statements. Jeez.... I'm a retard...

Moral of the story part XVII: Single OpAmps do not equal Dual OpAmps.


Grr.. :evil:

[RDV]

Patrick:

I'd like to hear what you think of the HMP when you get that working. I'm working on that one again and have some suggestions to try if it doesn't sound right to you.

Thanks

RickyDV

[pbrommer]

Thanks Ricky.. I'll take a look at it today and shoot you a PM. I only had a little bit of time last night with it, as my fiance had a major back spasm last night. Check your PM's tonight.

Patrick