Delay pedal (china) - Expression mod
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- Joined: 10 Feb 2015, 04:30
Hello friends, I want to mess up a pedal haha.
Is a digital delay - analog voiced, and playing with the time control it gives really cool sounds, but it lacks of an output for an expression pedal and that is what I want to add.
I have disassembled the pedal and found that it has a 100k Ohm pot (B104).
I was just thinking in solder wires from the pot, to a new TRS jack and drill the case.
How can I export it to an expression pedal, if almost all pedals are between 10 to 25 k ohms?? (my expression pedal is 20K I think, is the pigtronix dual EXP)
Do I have to make a type of circuit or something?
Thank you.
Is a digital delay - analog voiced, and playing with the time control it gives really cool sounds, but it lacks of an output for an expression pedal and that is what I want to add.
I have disassembled the pedal and found that it has a 100k Ohm pot (B104).
I was just thinking in solder wires from the pot, to a new TRS jack and drill the case.
How can I export it to an expression pedal, if almost all pedals are between 10 to 25 k ohms?? (my expression pedal is 20K I think, is the pigtronix dual EXP)
Do I have to make a type of circuit or something?
Thank you.
- Nocentelli
- Tube Twister
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Figure 2 here shows a way to use an expression pedal to control an led that controls an LDR which could replace the time pot using a switching jack for the expression input:
http://tech.thetonegod.com/rockncontrol/rock.html
http://tech.thetonegod.com/rockncontrol/rock.html
modman wrote: ↑ Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...
- phatt
- Transistor Tuner
Thanks "Nocentelli" interesting concept and good info on leds.
But if looking for a simple way you just need a pedal with the same value as the 100k internal pot.
Hard to see but looks like the pot in question is wired as a resistor so you may only need 2 wires.
The down side of taking wiring direct out like this is that if you short the wires it might kill the pedal. yes I'm talking from experience
Phil.
But if looking for a simple way you just need a pedal with the same value as the 100k internal pot.
Hard to see but looks like the pot in question is wired as a resistor so you may only need 2 wires.
The down side of taking wiring direct out like this is that if you short the wires it might kill the pedal. yes I'm talking from experience
Phil.
- Nocentelli
- Tube Twister
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phatt wrote:Thanks "Nocentelli" interesting concept and good info on leds.
But if looking for a simple way you just need a pedal with the same value as the 100k internal pot
20k expression pedal would give a good range of brightness for an Led, put a 1k resistor in series to prevent burning it out at minimum resistance on the exp pot.soundcityec wrote: How can I export it to an expression pedal, if almost all pedals are between 10 to 25 k ohms?? (my expression pedal is 20K I think, is the pigtronix dual EXP)
Do I have to make a type of circuit or something?
modman wrote: ↑ Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...
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- Joined: 10 Feb 2015, 04:30
Thank you very much for the reply.
I did read the article but I'm not that experienced, also my english is not so good
I thought it was as simple as soldering wires to the expression jack with a resistor to compensate the 20k ohm from the pedal
I did read the article but I'm not that experienced, also my english is not so good
I thought it was as simple as soldering wires to the expression jack with a resistor to compensate the 20k ohm from the pedal
- Nocentelli
- Tube Twister
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You need a variable resistance that goes 0-100k if you want the same range as the pot.soundcityec wrote:I thought it was as simple as soldering wires to the expression jack with a resistor to compensate the 20k ohm from the pedal
You could add a resistor of 82k in line with the expression pot, but then you'd only get 82k -> 102k, so only a small change from nearly-maximum to maximum delay time.
modman wrote: ↑ Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...