[lesPaul87]

Hi everyone, I'm new to the forum, but I'm working on modifying my Dunlop crybaby, and I had an idea that I thought some people here might be interested in, and hopefully a few could give some advice on.
This is the inspiration for the mod:
Youtube video of foot on pedal mod
When you go to the link from the description to take a look at the mod, however, you see that you need a 3PDT stomp switch, a 3PDT toggle, and a DPDT momentary switch, along with some messy looking wiring. This seems like it would end up costing a bit more than I am looking to spend, and I can't find anything other than a SPST stomp switch at the local electronics store, so I had the idea for designing the same system, but using just 2 SPST switches that I have or could buy (stomp and momentary), a SPDT toggle, and a DPDT relay.

I have a proposed schematic, but nothing to upload it to, so for now here is the verbal schematic: A +9V wire comes from the PCB, to a SPDT toggle that is mounted on the side of the pedal to select the foot-on-pedal or traditional switching option. For the traditional switching option, the 9V wire goes to a SPST stomp switch mounted in the conventional location, then the other side of that switch goes to the positive side of the 9V DPDT relay. For the foot-on-pedal, the 9V wire goes to a SPST momentary switch mounted as shown in the video, then to the relay. A ground wire comes from the PCB to the negative terminal of the relay, then the DPDT relay is wired just like a DPDT true bypass switch, with the default setting as bypassed.

The idea here is the relay must get +9V to the positive terminal to engage the wah pedal, so that 9V goes through either a traditional or momentary switch, and if those switches are closed, the relay will get the power and the wah will engage.

So what are everyone's ideas on this? Do you think it will work, or are there problems with using relays in pedals (I've never seen it done before). Could the electromagnetism of the relay cause interference with the inductor in the wah or something else? Is there a chance of a popping sound when the switch is engaged? Also does anyone know if there is a simple way to add LED's to this design? I'd appreciate your thoughts.

ps if there is a way to upload my schematic please let me know; that would be a lot simpler for everyone.

[Bside2234]

I've used relays to true bypass Boss pedals. Works great.
For adding an LED, google "millenium bypass" It's for adding a LED using a dpdt.

You can upload your pictures at Photobucket.com and insert the link or image that way. I have an "insert image" button available right above the text box when I make post/replies. Don't you?