ElectroVibe Modifications Thread

Big Monk

Well-known member
Anyone think of implementing an expression option yet? I’m thinking I could get away with a pair of switched jacks connected to the two gangs of the rate 2 pot, and using a 100k dual expression pedal such as the Boss EV-3 with both jacks in use. I thought about using either a TRRS jack or a DIN jack and then creating my own dual gang expression pedal, but I don’t believe a switched DIN jack exists, and I can’t find a switched TRRS jack that has an isolated sleeve connection. Of course depth is an issue, but I think I have it worked out in a way where that won’t be an issue.

One of the draws of the Good Vibes is the assignable expression output.
 

Big Monk

Well-known member
Does anyone know what the Symmetry control on the Electronic Orange Moon Vibe and RM Voodoo Vibe does?

I have a feeling it’s a topside LFO offset control. The Voodoo Vibe has a topside bias control as well.
 

Big Monk

Well-known member
Further investigation of the Electronic Orange manual and the Roger Mayer Voodoo Vibe seems to indicate that the Electronic Orange "Symmetry" control is in fact the Offset we know from the EV. The Bias or Gain control is a trim on the inside like the EV. Also, the Moon Vibe has an internal Volume trimpot, which seems silly as you can just make that resistor bigger in a fixed version.

The RM Voodoo Vibe has a bunch of stuff going on but nothing too crazy. "Symmetry" is again just the Offset control and Bias is external. I'm not sure what is happening with the Speed Range control but I assume it varies the resistors in the speed circuit to expand the range.

I'm entertaining a small breakout board for use with my EV Mini that will use these pots for external control of Offset and Gain:

 

ntuncer

Active member
Here is what I found for the mini boards, correct me if I am wrong. it could be useful to add bi-color led without using them.
  • Vibe is normal true bypass wiring.
  • Speed is like below
speed wiring.jpg
 

ntuncer

Active member
When Speed footswitch off, Speed 2 knob controls, when on, Speed 1 knob. Is it possible to inverse it? If yes could you please explain?

Cheers
 

Big Monk

Well-known member
When Speed footswitch off, Speed 2 knob controls, when on, Speed 1 knob. Is it possible to inverse it? If yes could you please explain?

Cheers

Since the switch goes between the 2 speeds, I wouldn’t think of it as an On/Off switch but rather an On/On.
 

Big Monk

Well-known member
yes when the speed led off means speed 1 knob active when the led on speed 2 knob active.

You could attack this 2 ways:

1.) Simply swap the wire that that comes into the foot switch from the LED to its opposite pole or;

2.) Use a Bi-color LED. I used Red/Blue and have a blue knob on speed 2:

88D503E7-DBA8-4B41-B397-E1955CF1F300.jpeg
 

ntuncer

Active member
You could attack this 2 ways:

1.) Simply swap the wire that that comes into the foot switch from the LED to its opposite pole or;

2.) Use a Bi-color LED. I used Red/Blue and have a blue knob on speed 2:

View attachment 22567

For the first option, speed led has a continuity on the pin 5. Should I change the opposite pole like below?

Before:
speed-wiring-jpg.21655

after
1644054374369.png
 

nkt$275

Member
Has anybody posted what appears to be the choice hfe for the 2N5088 transistors ?
Big Monk you ROCK !
Will you post a photo of the inside of your Electrovibe with all the mods ?
 

Big Monk

Well-known member
Has anybody posted what appears to be the choice hfe for the 2N5088 transistors ?
Big Monk you ROCK !
Will you post a photo of the inside of your Electrovibe with all the mods ?

There’s really nothing to see on the inside. Rather, the mods are all on board components with different values or hidden underneath the board.
 

ADAOCE

Well-known member
Has anybody posted what appears to be the choice hfe for the 2N5088 transistors ?
Big Monk you ROCK !
Will you post a photo of the inside of your Electrovibe with all the mods ?
I wondered this at first too but was told by others that they didn’t check transistors. I just soldered in the first 14 2N5088s I could find and it sounds 🤌
 
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