SOLVED Electrovibe woes

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dstahl

New member
So I have it kind of working.
Lamp lights up and I get effected sound in chorus mode.
But I am having these issues:
  1. Led's don't light up. I assumed the square pad was for positive (longer legs). I have yet to snip them. So I can always flip them if that is the issue.
  2. Vibrato mode is either so subtle or not working at all
  3. the lamp keeps pulsing whether footpedal switch is engaged or off.
  4. getting crackling on the left speed know. I have electrical tape on the back of pot. but maybe a grounding issue
any thoughts on some steps I can take to troubleshoot.
electrovibe.jpg
 

NickC

Active member
1. The A is positive (long leg)
2. Try with closed box
3. It's normal
4. Try put tape on all back pot
 

Big Monk

Well-known member
Led's don't light up. I assumed the square pad was for positive (longer legs). I have yet to snip them. So I can always flip them if that is the issue.

Square pad is the cathode, or negative, lead of the LED. Try flipping them. If that doesn’t work, try the LED resistor. What I’ve been doing lately is sticking the LED I’m gonna use on the breadboard and finding the value resistor I like before installing.
 

Big Monk

Well-known member
totally worked.
And I added your @Big Monk 's resistor change for more volume
Thanks @NickC and @Big Monk

Well, it's not mine but I appreciate the sentiment!

It was proposed a LONG time ago by the great R.G. Keen in his article on Univibes. I'm pretty sure his article pre-dates most of the now ubiquitous Vibe clones. A real resource.
 
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