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JackLondon

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  • 1 month later...
  • 1 month later...

I have a twin loop pedal, but I want to modify it to have a simple blend (more like a volume control actually) on each loop.
My idea is to:
add a wire from 'A' to 'B' to keep a dry signal (possibly with a kill switch)
Add vol pots to the loop returns 'C' & 'D'

Would this work?

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  • 3 weeks later...

Coming a bit late to this discussion but only just seen it. The best and cheapest place for components is Rapid Electronics, www.rapidonline.com. It will be the place that other suppliers get their bits from and sell them on to you. Order direct or open an account, next day delivery too.

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[quote name='bartelby' timestamp='1321188790' post='1436195']
I have a twin loop pedal, but I want to modify it to have a simple blend (more like a volume control actually) on each loop.
My idea is to:
add a wire from 'A' to 'B' to keep a dry signal (possibly with a kill switch)
Add vol pots to the loop returns 'C' & 'D'

Would this work?

[/quote]

I wouldn't advise doing it that way. It may work, but you'd be better off building a small active circuit to achieve what you're after. I'd suggest Googling the "bass paralooper" by Moosapotomous (I think that's his name), and the "B Blender" by Sean M. Both of those circuits are very simple to make and should give you what you want.

Do a bit more googling on the Paralooper and you'll see how you can use filters to achieve decent results too - I'm literally at the start of a project putting a Paralooper and a Big Muff in the same box (with the BM in place of the loop on the Paralooper), and will be using a variable Low Pass on the clean and a variable High Pass on the BM. Plan is to be able to get Big Muff sound but still retain the low end. It's probably overkill on my part, but worth a go. I have a Bass Big Muff you see, and would like a more usable blend mode, so rather than mod that pedal it's easier to just build my own.

Good luck with your project, you might find more help available over at the DIYstompboxes forum, and it's certainly a good place to read up about anything you're going to try, as chances are someone else will have tried (and failed!) previously and will give you an insight on things to do/not do etc.

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  • 1 month later...

I've just got the parts for my first ever pedal project. Nothing complex, a looper & 2 channel mixer in one.
I got schematics for a simple passive mixer so I can take the L & R out of the Bass Murf & put the L channel through a few FX & have the R channel just a clean 110Hz shelf & I got the schematics for a simple looper with an LED. The looper is so I don't have to tapdance so much as I often go from a clean tone to octave, dirt & filter
I'm putting the whole lot in the one box so it takes up less room.
Pics when I've made it/come up with problems & need help.

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Well I started my pedal project last night. Spent ages determining where it's going on the board & laying it out & now have my 1st problem.

I haven't tried the loop yet & the mixer section isn't wired as yet, but I plugged the power in (all it does is power an LED), but the LED didn't work.

& how do you know what pin 1 is on a 3PDT, or is pin 1 & pin 9 the same?

Here's the schematic for the looper section...

[url="http://experimentalistsanonymous.com/diy/Schematics/Buffers%20Switchers%20Mixers%20and%20Routers/TB%20with%20LED%20and%20volume.gif"]http://experimentalistsanonymous.com/diy/Schematics/Buffers%20Switchers%20Mixers%20and%20Routers/TB%20with%20LED%20and%20volume.gif[/url]

& here's some pics of what I've done so far...

[url="http://www.flickr.com/photos/xgsjx/sets/72157628835174847/"]http://www.flickr.com/photos/xgsjx/sets/72157628835174847/[/url]

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[quote name='xgsjx' timestamp='1326368276' post='1496047']
Well I started my pedal project last night. Spent ages determining where it's going on the board & laying it out & now have my 1st problem.

I haven't tried the loop yet & the mixer section isn't wired as yet, but I plugged the power in (all it does is power an LED), but the LED didn't work.

& how do you know what pin 1 is on a 3PDT, or is pin 1 & pin 9 the same?

Here's the schematic for the looper section...

[url="http://experimentalistsanonymous.com/diy/Schematics/Buffers%20Switchers%20Mixers%20and%20Routers/TB%20with%20LED%20and%20volume.gif"]http://experimentali...nd%20volume.gif[/url]

& here's some pics of what I've done so far...

[media]http://www.flickr.com/photos/xgsjx/sets/72157628835174847/[/media]
[/quote]

Difficult to see from the pictures, but first thing to check is polarity of LED and DC jack. Your switch looks correct.

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I didn't know LEDs required the polarity to be the right way round (I thought they'd just be like a tungsten)?
I did try reversing the polarity on the PSU though & still nothing. I'll have a mess about when I get home (@3:30)

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Cheers guys. Both legs was the same length, but one side of the LED does have a flat bit on it & appears to be to ground.
I'm gonna try tapping a couple of wires on either side of the LED & check if it works. I'll test the audio side of things too & report back.

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Hey guys, asking for help again.

The looper side I have working ok. The mixer side, not yet. I need to know where to stick the ground? It's an ABS case (plastic to you & me), so I thought the output ground would go on the tops of the pots. Nope! No signal.

Here's the schematic (well, picture), could someone please help? I'm making it just 2 channel



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[s]Fixed it! Pics coming soon.[/s]

Nope, I haven't! Buzzes like a big fridge. :(

Any ideas anyone? It's fine 1 channel at a time, but the minute I put 2 ins. BZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ!!!!!

I'll have a mess about after work tomorrow.

Edited by xgsjx
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[quote name='xgsjx' timestamp='1326480147' post='1497896']
[s]Fixed it! Pics coming soon.[/s]

Nope, I haven't! Buzzes like a big fridge. :(

Any ideas anyone? It's fine 1 channel at a time, but the minute I put 2 ins. BZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ!!!!!

I'll have a mess about after work tomorrow.
[/quote]

Sorry for the late reply. Where have you got your grounds tied to? Also, have you shielded the ABS box? Start there and then worry about what you've got going into each input! :)

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[quote name='TG Flatline' timestamp='1326624760' post='1499559']


Sorry for the late reply. Where have you got your grounds tied to? Also, have you shielded the ABS box? Start there and then worry about what you've got going into each input! :)
[/quote]
Thanks TG, should I tap all my grounds to the top of a pot?
The box isn't shielded, I could spray glue into the box (emptied) & stick tinfoil into it.

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Just a shout to the company I got the parts from.

http://www.rshelectronics.co.uk/

Excellent service, great communication (I asked questions about parts on a Saturday afternoon & they emailed me back the same day & also on the Sunday) & good prices.

What impressed me was that I placed the order on the Sunday & got the parts on Tuesday. The way it should be. :D

I'd recommend these guys any time.

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[quote name='GarethFlatlands' timestamp='1326647826' post='1499898']
Does anyone know how you'd go about doing a simple cover for an effects pedal like the Deviever pedals? I guess a simple design printed off onto regular paper but I'm not sure what to stick it to the metal or sealing/lacquer it with.
[/quote]

Glossy and Matte photo papers both work well and I've got decent results with both. I've tried a variety of glues and you know what worked better than anything? A well sanded box and Pritt-Stick. Not kidding, goddam Pritt-Stick. A thin coating on the box and a thin coating on the paper and you're laughing. Smooth it out gently with a credit card. There will be better ways, I'm sure, but that works well for me.
Plastikote Super Clear does a decent job over the top, just make sure you get your coats numerous and uber-thin. Fewer but thicker coats just don't look as good.

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All built & working. Pics to prove it!


[url=http://www.flickr.com/photos/xgsjx/6707842955/][/url]


[url=http://www.flickr.com/photos/xgsjx/6707844547/][/url]

Signal goes Bass into Black Router, send to OC-3 > Bass Murf. Left out from Murf (Notched at 160, 350 & 775 Hz only) into SDS-2 & into the return on BR. BR out goes to the CE-2 > MF-101 & then into C1 on mix section on BR.
Right out from Bass Murf goes straight to C2 on BR mix (only frequencies below 110 Hz & a 240 Hz notch goes to this channel) & then both channels mixed together.
When engaged the CE-2 & LPF only affect the looped signal (so all sub is clean). When not engaged, it's a clean sound straight into the CE-2 & LPF.

Proper band test tonight!
Sound clips to follow! :D

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