There has been some discussions at the hackerspace of doing a guitar effects pedal workshops.
If you are interested in that sort of thing, you may like the article from Hack-A-Day today on building a tremolo pedal which was originally posted on Hack A Week.
If you’d like to see us do some of this with experts around, keep your ear turned in our direction. We’re also discussing some classes like soldering to help build skills required in building these sorts of pedals. Also, let us know if you think this would be an interesting workshop.