Little VOODOO VIBE project by Kaputepalla

alessandro · Post by **alessandro** » 03 Jun 2008, 18:43

I hope that someone could give a hand to make the little voodoovibe with a tap tempo led driver!This could become the most versatile vibe and the project of the century!Any good idea?Thanks by KAPUTEPALLA

owens · Post by **owens** » 04 Jun 2008, 11:20

HI, where may I find the little voodoo vibe schematic?
thanks
owens (ITALY -PD)

alessandro · Post by **alessandro** » 04 Jun 2008, 16:14

Hi owens you'll find schematics pcb and all you need in the first page of this thread!

owens · Post by **owens** » 04 Jun 2008, 18:58

scuse me alessandro , I need the electric schematic that is not included in a zipped file.

Ciao
owens

suregork · Post by **suregork** » 06 Jul 2008, 15:29

Well I just finished my Voodoo Vibe, and am very suprised that (1) it worked straight away (it was my first ever pcb etch

, not the easiest of projects), and (2) that it sounds awesome (I used the univibe caps)..

Here are some pics:

Another exterior shot
Another shot of the board

It was a hell of a wiring job ...

Now the only thing that I'm not so happy about is that there is a constant audible noise that hums/beeps in tempo with the blinking leds. Is there anything I could do to minimize it, or is it the audio wires picking up noise from the oscillator wires (or similar)? I can't hear it while I play (the effect overpowers it), but when idle it gets abit annoying..

Thanks for the great project..

suregork · Post by **suregork** » 07 Jul 2008, 16:14

suregork wrote:Well I just finished my Voodoo Vibe, and am very suprised that (1) it worked straight away (it was my first ever pcb etch , not the easiest of projects), and (2) that it sounds awesome (I used the univibe caps)..

Here are some pics:

It was a hell of a wiring job ...

Now the only thing that I'm not so happy about is that there is a constant audible noise that hums/beeps in tempo with the blinking leds. Is there anything I could do to minimize it, or is it the audio wires picking up noise from the oscillator wires (or similar)? I can't hear it while I play (the effect overpowers it), but when idle it gets abit annoying..

Thanks for the great project..

I tried my VV with a 9V battery, and no oscillation noise at all! Could a bad power supply be the cause for the noise (I was using a general crap 3v-12v variable power supply, not even meant for audio usage)? If so then I think I have to go out and buy a 1spot or similar..

Ripdivot · Post by **Ripdivot** » 07 Jul 2008, 19:46

Hi, I would like the schematic as well. I read all the posts in this thread but cannot find the schematic. It is not in the zip file. Thanks in advance...

suregork · Post by **suregork** » 07 Jul 2008, 20:43

http://web.archive.org/web/200101230433 ... vibe1.html
http://web.archive.org/web/200101230430 ... vibe2.html

The schematics in the project are based on these files, and have some corrections. I'll upload them tomorrow (they are on my other computer) if no one else does it before me..

suregork · Post by **suregork** » 08 Jul 2008, 15:01

Sorry for spamming a lot of replies in this thread but here are the corrected schematics.. I also uploaded my parts list if anyone is interested: http://www.kolumbus.fi/mkrogerus/suregork/vvparts.txt

puppiesonacid · Post by **puppiesonacid** » 08 Jul 2008, 15:51

anyone willing to convert that .rar file to a .pdf for the .rar challenged? Im at work... cant install a .rar downloader...

thanks,

puppiesonacid

theehman · Post by **theehman** » 08 Jul 2008, 16:07

puppiesonacid wrote:anyone willing to convert that .rar file to a .pdf for the .rar challenged? Im at work... cant install a .rar downloader...

thanks,

puppiesonacid

Here you go.

puppiesonacid · Post by **puppiesonacid** » 08 Jul 2008, 17:01

theehman wrote:
puppiesonacid wrote:anyone willing to convert that .rar file to a .pdf for the .rar challenged? Im at work... cant install a .rar downloader...

thanks,

puppiesonacid
Here you go.

THANK YOU

ID_tone · Post by **ID_tone** » 01 Sep 2008, 17:28

hey everyone. i feel like i'm a little late to the party, but i'm new to the forum (and pretty new to building effects). i want to give the voodoo vibe a shot, but i'm not crazy about the idea of the "speed range" rotary switch. how hard would it be to remove the rotary switch, and just use the "speed" control pot to do all of the speed changes? i would incorporate a switch to choose between sine and square waves.

thanks!

ik6gpy · Post by **ik6gpy** » 01 Sep 2008, 18:01

ID_tone wrote:hey everyone. i feel like i'm a little late to the party, but i'm new to the forum (and pretty new to building effects). i want to give the voodoo vibe a shot, but i'm not crazy about the idea of the "speed range" rotary switch. how hard would it be to remove the rotary switch, and just use the "speed" control pot to do all of the speed changes? i would incorporate a switch to choose between sine and square waves.

thanks!

Hi There!
If you check the schematic, you'll see that the "Range" switch let you choose between 3 capacitors (the tantalum ones that go to pin 10 of the 8038), so you can't set the speed range with a variable resistor. If you don't want to use a rotary switch for that, you could use a simple on/off/on toggle switch (2,2uF in series with 1uF gives you 0,68uF approx, and 2,2uF in series with 0,39uF gives you 0,33uF). Then you can choose between sine and square wave with another SPDT on/on toggle switch
IMHO the rotary switch remains the best way to do it.
Cheers
Matteo

ID_tone · Post by **ID_tone** » 01 Sep 2008, 18:17

i see what you're saying, but i was wondering more along the lines of using only a pot to control the speed, from the absolute slowest to absolute fastest.

does the capacitor value create min. and max. limits on the speed, or is some of the limitation coming from the value of potentiometer used as the "speed" control? if that's the case, then changing the value of the pot (to, say, 500k or 1M) would allow a broader range of speeds to be reached, without having to switch between capacitor values.

ik6gpy · Post by **ik6gpy** » 01 Sep 2008, 19:18

ID_tone wrote:i see what you're saying, but i was wondering more along the lines of using only a pot to control the speed, from the absolute slowest to absolute fastest.

does the capacitor value create min. and max. limits on the speed, or is some of the limitation coming from the value of potentiometer used as the "speed" control? if that's the case, then changing the value of the pot (to, say, 500k or 1M) would allow a broader range of speeds to be reached, without having to switch between capacitor values.

You're right the capacitor creates min and max limits on the frequency range, but you can check the ICL8038 datasheet. It should be easy to extend the frequency range using only 1 capacitor, a variable resistor and some minor changes on the schematic.
Cheers
Matteo

ID_tone · Post by **ID_tone** » 01 Sep 2008, 19:41

does anyone know what the absolute minimum and absolute maximum frequencies are in the current voodoo vibe?, meaning, the slowest vibe rate, and the fastest vibe rate. i'm pretty sure that this can be done (i've been looking at the ICL8038 datasheet), but i need to know what range it is that i'm trying to generate. also, is there any reason to have IC1 and all of it's connected components, in regards to tone? what effect does it have on the overall sound? i'd like to remove that whole section and replace it with a single pot and a jack for an expression pedal.
(i know i'm making huge changes to the pedal, but what i really want is a DC univibe, and this sounds like the best option. i like the tremolo option, but i don't necessarily need all of RM's extra features, and would like to omit many of them, to keep this simpler.)

ID_tone · Post by **ID_tone** » 01 Sep 2008, 22:07

i know, i'm doing a lot of posting in a short period of time... i just keep thinking of new things.

is there a simpler LFO section that could get the job done? (driving 4 LEDs, and giving me "speed" and "depth" control)?

Nanoo Man · Post by **Nanoo Man** » 21 Sep 2008, 06:15

Bernardduur wrote:I think he used Tantalum caps for space as this caps were placed under a jack

I just used normal film caps and am very fond of my build; in a short while I need to A/B it with a friends original

Question; how would someone add a true stereo function on this pedal? I like it a lot but would love to use it in stereo with my (homebuild) Dumble and Trainwreck amps........ any ideas on this?

Well, I'm brand new to this forum, so I hope I'm not just cutting in, but here's a website addressing all kinds mods and shaping for the original univibe circuit. He gives an example of how to make it stereo, which I am seriously hoping one of us figures out how to implement this to the voodoo.

http://geofex.com/Article_Folders/univibe/uvfrindx.htm

Nanoo

I fact, wouldn't this be the ultimate machine with a "pan" function added in? If it can handle tremolo, it should handle a simple pan function. Also, to be even more ridiculous, how wold you add in a manual control over the wave? For instance, a potentiometer (pedal) that would control the tremolo function from silent to maximum volume. The potentiometer could be switched in and out. I'm supposing this would be in some sort of conjunction with the "ICL" chip controlling "speed." Any thoughts? This would make a truly intense and wonderful pedal. Like Bernardduur, I want to use this thing with two amps, and it would just be killer in stereo. It seems like you could use this unit to avoid a separate pan unit.

noelgrassy · Post by **noelgrassy** » 21 Sep 2008, 21:37

^ IIRC the Pluto Pedal offered control over these parameters. A friend owned one of these so I could be full of shite.

Little VOODOO VIBE project by Kaputepalla [documentation]