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Rub a Dub with 2 settings.

Posted: Fri Jan 15, 2016 2:00 pm
by ThurberMingus
I want to build the other guitarist in my band a Rub a Dub reverb that has two footswitchable settings. Two knobs, two footswitches, two LEDs. How would I go about wiring that up?

Re: Rub a Dub with 2 settings.

Posted: Fri Jan 15, 2016 2:02 pm
by ThurberMingus
Shit maybe three LEDs and have a bypass indicator and have the other two show which setting is active.

Re: Rub a Dub with 2 settings.

Posted: Fri Jan 15, 2016 2:39 pm
by gnomethrone
I've got a rub a dub coming I'm the mail built by Faldoe. One footswitch for regular mode and another that makes it go 100% wet. Only one LED but he might be able to offer some advice for what you're trying to do.

Re: Rub a Dub with 2 settings.

Posted: Sat Jan 16, 2016 3:21 am
by Faldoe
ThurberMingus wrote:I want to build the other guitarist in my band a Rub a Dub reverb that has two footswitchable settings. Two knobs, two footswitches, two LEDs. How would I go about wiring that up?


So one footswitch for bypass and the other to choose between two Mix pots? If so, thats pretty easy. You'll need a 4DPT footswitch. Wires from the PCB points for the Mix/Level control would go to the center row of the switch, the three lugs. And each pot would have wires going to each of the outer rows - so when you hit the switch, the switch toggles between each of the pots, choosing the one on one side of the switch and then the other.

The extra row on the 4DPT would be for the LED(s). I've used bi-color in the past to choose which setting I'm on.

Edit. Here is a shitty diagram:

Image

Re: Rub a Dub with 2 settings.

Posted: Sat Jan 16, 2016 8:09 pm
by ThurberMingus
Thank you Faldoe, that is exactly what I'm looking for! If I did a bi-color LED would I need a resistor coming off the 4pdt?

Re: Rub a Dub with 2 settings.

Posted: Sun Jan 17, 2016 1:42 pm
by Faldoe
You can have the resistor coming of the middle lug or just have a wire going to the 9v jaxk and have the resistor right before the wire and the jack:

Image

Re: Rub a Dub with 2 settings.

Posted: Fri Jan 22, 2016 9:20 am
by Gigahearts_FX
According to the schematic, the Pot has 2 of the lugs that you need to switch (Mix) and one which goes to ground. Therefore as long as you wire up the lugs to each other and the ground point on the PCB, you can use a more common, smoother actuating, cheaper, and more robust 3PDT switch to achieve this.

Re: Rub a Dub with 2 settings.

Posted: Sat Jan 23, 2016 1:46 pm
by multi_s
Gig has a point but actually it looks like you only need to switch the wiper of the pot, you can leave the other 2 lugs hardwired for both pots .for ultimate technical correctness switch the pots to 100k when you do that so teh brick will "see" the same load, but it probably won't matter very much. so you could do it with dpdt even, and do the LED exactly as faldoe has shown if it is common cathode led.

Re: Rub a Dub with 2 settings.

Posted: Sat Jan 23, 2016 10:56 pm
by Faldoe
good points. you guys know whats up

Re: Rub a Dub with 2 settings.

Posted: Sun Jan 24, 2016 1:57 am
by multi_s
Faldoe wrote:good points. you guys know whats up


your solution is very good too, it is the most general, could work on any circuit. it just so happens you can skimp out a bit with this circuit, although any of the proposed schemes would do.