I having trouble getting a vibe effect from my etched and assembled board. I followed the build doc without any deviations. The charge pump kicks out 18V. The board passes sound when hooked to my test rig. The lamp lights up fine and when I rotate the gain trimmer back and forth it changes the brightness of the lamp. Changing the lamp brightness also dampens the sound, which is how I think the vibe effect is done.
The weird thing is for a few seconds when voltage is first applied to the circuit, the lamp "vibes". However, the lamp eventually "locks up". I have R16 and R17 socketed, as suggested in the build doc. I tried values from 1k8 to 4k7, but that doesn't seem to help at all.
Does anyone have any experience with this circuit that could shed light on the problem?
Do you have a link to the project? i could not find it on Etchers Paradise.
Check your component values, sounds like it could be a wrong resistor or cap. Also check for solder bridges and make sure the solder flux has been cleaned off.
Hope this helps
Peter
I'm assuming he's referring to the quadrovibe?: http://www.madbeanpedals.com/projects/Quadrovibe/Quadrovibe.pdf
Yes, it's the quadrovibe.