delay

[flateric]

Here's a delay pedal project at the request of a talented bass pal; the Time Machine.
PCB from tonepad.com, circuit modified with send-return loop and an op-amp buffer.



Only the delay signal gets routed thru the send-return loop so you can apply quite a subtle effect or a deeply shocking one to the repeats while still getting the clean dry signal pushing through first.
Here the completed circuit routed through the buffer is bveing readied for testing before boxing up.


Here's the finished pedal guts shot, this is about as close as I can get to neat and tidy


Enclosure graphics, finished pedal


Found a sexy little indicator LED to install from ebay which is pre-wired to pulse though blue/gree/purple/orange and guaranteed to partially blind direct eye contact in a dark pub gig.

[reTrEaD]

Dude!

The lead dress and solder connections to jacks and pots looks more than respectable.

The only constructive criticism I can offer is on the inline splices. Considering how difficult is is to make those, without them being "lumpy", I think you did a fairly decent job there. But in my experience they tend to work out better if you can find a way to hold the ends parallel to each other while you're soldering them. Since you are joining three wires together this can be difficult. Especially for the two that are approaching from the same direction. I find that an alligator clip can help to keep them stationary while soldering. If you stagger the joints of the reds and blacks, this results in a longer but less bulky bundle. But all things considered, your results still look pretty darned good.

I'd be interested in seeing the soldering to the bottom of the printed board and perfboard.



Cheers!

[JFrankParnell]

awesome! and does the pulsing light pulse to the delay speed?

[flateric]

No, sorry, it just flashes in an random and annoying way to put you off when you're playing

[yakkmeister]

Hey man!

More nice stuff - I dig your graphic work!

I would like to know - what's the opamp buffer for?

[flateric]

Thanks for your comments, its added to keep the impedance balanced after the send-return loop so you can loop straight into another effect pedal and not have to worry about where the signal is originating from or where it's going to.

[yakkmeister]

Oh, yeah. Cool.

Is there a resource around here that makes that make sense? Cos I have no idea what most of that means.

[flateric]

this helped me...
beavisaudio.com/bboard/projects/bbp_ICBuffer.pdf