Zvex - Probe series

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Re: Zvex - Probe series

Postby T1bbles » 10 Jan 2010, 15:49

Also, has anyone got a parts list for this project?

Thanks again,
M
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Re: Zvex - Probe series

Postby Jaicen » 23 Jan 2010, 22:12

I don't know about a parts list for this thing, can anybody demonstrate a working example??
I'm getting pretty frustrated making mine work. I can get it to work, up to a point, but I can't seem to trim the range. I get 1-2" of usable range using a fairly large antennae and holding the battery in my other hand. Otherwise, I get extremely limited range, as in mm's.
Does anybody have a proven Vero layout I could try??
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Re: Zvex - Probe series

Postby Jaicen » 27 Jan 2010, 15:50

Right, forget all that, I got one working just fine using the Ghost Wah layout.
I'm not sure which way around the Zener diode should be, I had to turn it around to get it working. I also swapped out the sensitivity control for a 1M trimmer, which for some reason allowed me to tweak it in nicely. Range is pretty much spot on, even with my walking boots on, so it's all gravy!
That said, i've not got the wah portion built yet, but the hard part seems to be over.
Anybody got any suggestions as to the different values for the caps in the twin-T??

EDIT: Anybody know the best way to adapt this to control volume?
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Re: Zvex - Probe series

Postby soundclone » 28 Jan 2010, 05:24

can i subtituti 1n4003 diode with 1n4002?
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Re: Zvex - Probe series

Postby Jaicen » 28 Jan 2010, 08:25

You can, but it has a forward voltage of 1v, versus about 0.5v for the 1N40041, so you'll drop more voltage across it.
Where are you using it though? It's not on the Probes i've built.
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Re: Zvex - Probe series

Postby soggybag » 14 Feb 2010, 08:22

Can someone point me to the Ghost Wah schematic and Layout? I'm thinking about giving this a try.
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Re: Zvex - Probe series

Postby Jaicen » 14 Feb 2010, 23:43

If you read through this thread, the schematics are a few pages back.
There doesn't seem to be a ghost wah schem as far as I can tell, but it's just the colorsound inductorless wah with the probe. There's a PDF project with the layout and PCB files in this thread too.
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Re: Zvex - Probe series

Postby soggybag » 15 Feb 2010, 00:52

Thanks I'll take a second look. I think the "Ghost Wah" might be a different project.
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Re: Zvex - Probe series

Postby soggybag » 15 Feb 2010, 00:57

How much does the size of the antennae plate effect the performance? Do you get better performance with a larger plate?

What about the plate material. I've seen people using various things, from random scrap metal to copper clad PCB. Does the plate need to have a certain mass of material?

I'm asking because I'm thinking about how to build the plate. I was considering placing the plate on top of a B or BB box rather than making a separate plate.
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Re: Zvex - Probe series

Postby ~arph » 15 Feb 2010, 15:37

Yes, size does matter. The larger the surface area the better the range. I guess you can also use the box as the antenna, just make sure you use isolated jacks and that the enclosure is not connected to gnd.
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Re: Zvex - Probe series

Postby earthtonesaudio » 15 Feb 2010, 16:04

Antenna construction is critical in some ways, not in others.

For the material, it just has to be a conductor. You can use copper for pretty looks and ease of soldering, but brass also takes solder well and is a little cheaper I've used aluminum foil attached with clip leads, and one time I even connected a clip lead to a Boss pedal and used it as an antenna!

You could use the enclosure but there are caveats. As ~arph said you can't ground the enclosure, but you also have to realize that the box is now a source of RF noise which will get into your circuitry. This can be troublesome so it's a good idea to shield the audio portion from the RF portion... which would be tricky if you used the enclosure as the antenna.


The mass of the antenna is electrically trivial. All that matters is surface area. For more in-depth info check out the definition of a parallel plate capacitor.
rocklander wrote:hairsplitting and semantics aren't exactly the same thing though.. we may need two contests for that.
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Re: Zvex - Probe series

Postby TheMasamune » 02 Mar 2010, 17:57

Hi

I want to make a Volume Probe. I read all of this article and check all the layouts. But according to differents forumers on this thread, none of the layouts works.
Is there a complete working layout of the Volume Probe ?

I have the Arph Probe Layout too, but I don't know how to connect it to the circuit of a volume Probe.

Thanks for your help :)
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Re: Zvex - Probe series

Postby Xide88 » 11 Mar 2010, 19:54

Guys, i am really amazed with its projects!!! :D but i have several questions:

- Antenna - it is simple copper plate ?
- Antenna shoud be soldered straight from pedal? i mean from PCB to Antenna
- Is it able to use copper board for PCB instead of copper plate?
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Re: Zvex - Probe series

Postby TheMasamune » 17 Mar 2010, 00:36

Hmm... Sorry for my previous nooby post.
So... I read some threads and now, I understand how all that stuff works.

And, now, here is my problem :
I want to reverse the probe circuit (the Arph~ Probe) : When my foot is up, LED brights, and when my foot goes down, the led... goes down :)

My idea was to recreate the probe circuit included in the old Volume Probe ( The one in the beginning of this thread ) but there is just few informations and a picture :/

Is there a solution with the Arph Probe ?
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Re: Zvex - Probe series

Postby soggybag » 17 Mar 2010, 03:49

I just built up the Ghost wah. What's the value for the sensitivity pot?

Here's picture of the PCB: http://www.super-freq.com/?p=235
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Re: Zvex - Probe series

Postby devastator » 18 Mar 2010, 17:18

I think Soulsonic said "250KA" for the sensivity control .
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Re: Zvex - Probe series

Postby DWBH » 07 Jul 2010, 21:24

Found this while googling Arduino stuff: http://interface.khm.de/index.php/lab/e ... ng-device/

Look at that schem. Very very similar to other circuits floating around, but this one uses an inductor, which I've never seen.
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Re: Zvex - Probe series

Postby devastator » 20 Oct 2010, 19:31

What kind of surface can I use to have a decent proximity controller ?

I tried aluminium tape today and that doesn't work good (not at all anyways)

I made the soulsonic PCB he posted few post .
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Re: Zvex - Probe series

Postby batteryacidtea » 20 Oct 2010, 19:39

Most people uses a piece of pcb, with the copper side as the proximity sensor.
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Re: Zvex - Probe series

Postby Jaicen » 21 Oct 2010, 13:08

Mine works well with scrap PCB material, and plate aluminium, but the best material i've found is fairly thin brass sheet. Doesn't corrode like copper, and works pretty much as well.
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