[29] V-dub in da house!

Date: July 12th, 2007 | Comments : [13] | Categories: power.

Voltage doubler for guitar effects pedals

Double your voltage, double your fun!

Here is the completed AMZ voltage doubler in a mini-box. To give you an idea of the size, a 9v battery is a little bigger than the green foam pad in the bottom unit.

The camera flash reflected off the metallic particles in the paint and made the finish look weird – it’s not really sparkly like that. There are a few bubbles in the decal, probably because I did not let it dry long enough before going to the clearcoat step. Or maybe because my decal paper is a bit old.

Anyway, the unit accepts a 9v input on one side and outputs 18v on the other. It goes inline between your power supply and any pedal that you want to run off a higher voltage. It is a basic charge pump circuit with a few extra frills that help keep the output voltage clean and hum-free.

Using one of my switching power supplies, I measured 9.0v on the input side and 18.03v on the output under no load.

I did live tests with several pedals in my studio and really got some great new sounds. An 18v power supply can make a simple booster pedal run cleaner and with more oomph… send your amp into interstellar overdrive!

I have a handful of these boards on hand and I may sell a few or even organize a giveaway. I haven’t decided.

The updated pc boards are available here.

Edit: The photo below shows the doubler next to a TS-9 for size reference.

pedal power supply


13 Responses to “V-dub in da house!”

[36] Peter Woodward Says: 4:45 am, July 13th, 2007

IS the 18V output bi-polar? Could it be used to power some of the old Anderton designs? If so, how would you wire the DC jack in the 18V effect?

This is a very interesting project!

[37] admin Says: 5:55 am, July 13th, 2007

It is only a positive 18v output (and ground). It is made for use with buffers, clean boosts, or even some distortions that can take advantage of the increased voltage supply.

[38] Gil Says: 9:30 am, July 13th, 2007

Very nice!
I’d like to buy one now. 🙂
Could you daisychain a few 18v boxes with it?

[39] MetzBlaze Says: 9:42 am, July 13th, 2007

Could you post a layout and schematic for it? This is a Godsend for making a Mutron III Filter, since it runs on 18v.

[46] Rob Says: 1:05 pm, July 28th, 2007

Would love to be able to use this with my ada flanger. Would be happy to pay for a board or 2.

[48] tesvrypbne Says: 9:20 pm, July 31st, 2007

Hello! Good Site! Thanks you! qroxcayfibx

[488] NeilO Says: 9:37 pm, July 28th, 2008

Would it be possible to have a layout and schematic for this one? I’d love to build this thing! 🙂

[702] David Says: 12:51 pm, May 28th, 2009

Does anyone or you, Mr. Orman, have a schematic they could share? I would try to buy one but they are apparently sold out and I didn’t see this on the list for the CD. Thanks!

[740] admin Says: 5:45 am, July 3rd, 2009

I plan on having kits for the voltage doubler project very soon.


[746] Chris Kuff Says: 1:24 pm, July 13th, 2009

could this voltage doubler be used to make 12 volts 24? either way i’m ordering 2 kits. let me know when you have ’em. (c:

[803] AMZ-FX Guitar Effects Blog » Blog Archive » AMZ V-Dub pcb Says: 5:20 pm, September 30th, 2009

[…] 9v-to-18v converter that has more features and improved design. The old V-Dub articles can be found here and […]

[805] AMZ-FX Guitar Effects Blog » Blog Archive » Voltage Doubler PCB Says: 5:38 pm, September 30th, 2009

[…] you saw my previous post about the V-Dub circuit, then you know what these boards are all about. They are 9v to 18v charge […]

[934] olsen Says: 8:52 am, January 26th, 2010

can i power with it mxr 18-volts-pedals?


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