Triton Delay - Adding the "Glide" from EchoCzar to PT2399 [documentation]
- culturejam
- Old Solderhand
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Did this one a while back but thought I'd share here. I took the basic bones of the Deep Blue Delay (changed some filtering values), added a variable LPF on the delay output (via trimmer/cap), added a second Delay Time control with a slow transition when switching between Time 1 and Time 2. It works similar to some versions of the Toneczar EchoCzar how it does the "glide" between Time pots. Probably more of a curiosity than something you'd actually use all the time, but it's fun to play around with.
I just updated a few values on the drawing today based on the last one I built (which I think is the best sounding one I've done). I've also attached photos of a build I completed (and one I'm about to box up).
If you want to monkey with making the transition time (and resulting pitch-bend glissando effect) longer, make C20 larger.
Any questions, feel free to ask!
I just updated a few values on the drawing today based on the last one I built (which I think is the best sounding one I've done). I've also attached photos of a build I completed (and one I'm about to box up).
If you want to monkey with making the transition time (and resulting pitch-bend glissando effect) longer, make C20 larger.
Any questions, feel free to ask!
Sounds like a hot ticket. I'm currently trying to learn how to use KiCAD and redrew the schematic for practice. See attachment, hope I didn't make too many errors. Going to try making a PCB layout next.
If it's OK with you I'll put the KiCAD files on Github. When I started looking into KiCAD I noticed there are very few editable schems out there (same goes for Eagle). Having something to play around with would probably make the learning curve less steep. With that in mind, how would you like to be credited? Your schem just says "@function_fx"...
I also have a question: would it be OK to move R17 before the switch (or between the LEDs and ground) and omit R18 altogether?
If it's OK with you I'll put the KiCAD files on Github. When I started looking into KiCAD I noticed there are very few editable schems out there (same goes for Eagle). Having something to play around with would probably make the learning curve less steep. With that in mind, how would you like to be credited? Your schem just says "@function_fx"...
I also have a question: would it be OK to move R17 before the switch (or between the LEDs and ground) and omit R18 altogether?
- culturejam
- Old Solderhand
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This project is 100% free/open source, so do as you want with it.rockola wrote:If it's OK with you I'll put the KiCAD files on Github.
You can use "culturejam / @function_fx" if you like.rockola wrote: With that in mind, how would you like to be credited? Your schem just says "@function_fx"...
R17 / R18 + D1 / D2 are only there as indicators to show witch Time pot is active. You don't need them at all if you don't care about that. If you do drop them, then you only need a SPDT switch for the Time pots, instead of DPDT as drawn.rockola wrote:I also have a question: would it be OK to move R17 before the switch (or between the LEDs and ground) and omit R18 altogether?
Last edited by culturejam on 26 Mar 2020, 15:25, edited 1 time in total.
Will do, cheers.culturejam wrote:You can use "culturejam / @funciton_fx" if you like.rockola wrote: With that in mind, how would you like to be credited? Your schem just says "@function_fx"...
But if I do care and want the two LEDs, won't I still be able to get away with just one resistor, since the two LEDs are not on simultaneously?R17 / R18 + D1 / D2 are only there as indicators to show witch Time pot is active. You don't need them at all if you don't care about that. If you do drop them, then you only need a SPDT switch for the Time pots, instead of DPDT as drawn.
- culturejam
- Old Solderhand
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Oh, yes. I misunderstood your question. You are correct.rockola wrote: But if I do care and want the two LEDs, won't I still be able to get away with just one resistor, since the two LEDs are not on simultaneously?
I've uploaded my files on Github, see https://github.com/rockola/triton-delay
The files include a schematic in KiCAD format & PDF and a PCB layout in KiCAD format & Gerbers.
Unless someone spots a glaring error, I'll bite the bullet and put an order through Oshpark.
Board front:
Back:
Copper layers:
The files include a schematic in KiCAD format & PDF and a PCB layout in KiCAD format & Gerbers.
Unless someone spots a glaring error, I'll bite the bullet and put an order through Oshpark.
Board front:
Back:
Copper layers:
- culturejam
- Old Solderhand
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I'm a big fan of OshPark, but have you ordered through JLC PCB? The quality is quite good and it's insanely cheap (even with expedited shipping it's cheaper than OshPark).rockola wrote:Unless someone spots a glaring error, I'll bite the bullet and put an order through Oshpark.
- Dr Tony Balls
- Diode Debunker
Very cool! Ages ago I implemented something like a ramp control on a Leslie type effect, and I think this is similar. I'm not fully sure what that was, though. I have some notes that kinda look like a GEOFEX LERA but its a different circuit....not sure what it could be from.
Good call. I ordered PCBs of m-kresol's Rubidium Reverb (for which he has graciously released the Gerbers) from JLCPCB a while ago and was quite happy with the quality. Looks like they'll still do 5 boards for $2, which is of course hard to beat. I think I'll whip up a few more layouts to save on shipping.culturejam wrote:I'm a big fan of OshPark, but have you ordered through JLC PCB? The quality is quite good and it's insanely cheap (even with expedited shipping it's cheaper than OshPark).rockola wrote:Unless someone spots a glaring error, I'll bite the bullet and put an order through Oshpark.
- soulsonic
- Old Solderhand
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You painted and labeled before drilling?culturejam wrote:
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran
- culturejam
- Old Solderhand
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Yep! The purple one is UV printed. The other one I laser etched. It’s easier to etch or print first. At least for me.soulsonic wrote:You painted and labeled before drilling?culturejam wrote:
- soulsonic
- Old Solderhand
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I gave up doing that after too many boxes getting scratched
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran
- Seiche
- Old Solderhand
so how does it actually work? On the echoczar this "slide" is using the effect that the PLL is locking onto the voltage going into pin 9 and adjusting its clock frequency, why does it work here?
- plush
- Cap Cooler
I beleive, It works due to C20 providing kinda smooth transition (charge/discharge) between VCO clock adjustment (pin 6) when you are swapping resistances (potentiometers).Seiche wrote:so how does it actually work? On the echoczar this "slide" is using the effect that the PLL is locking onto the voltage going into pin 9 and adjusting its clock frequency, why does it work here?
- Dr Tony Balls
- Diode Debunker
That's definitely how the Geofex circuit works:plush wrote:I beleive, It works due to C20 providing kinda smooth transition (charge/discharge) between VCO clock adjustment (pin 6) when you are swapping resistances (potentiometers).Seiche wrote:so how does it actually work? On the echoczar this "slide" is using the effect that the PLL is locking onto the voltage going into pin 9 and adjusting its clock frequency, why does it work here?
- culturejam
- Old Solderhand
Information
Yep. Basically it just uses the R/C filter as a "bleed off" of current from pin 6. The time it takes to switch from one to the other is a function of the frequency of the R/C filter.
- Jarno
- Resistor Ronker
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Did you build these already, and are they OK?
Seems like an interesting project, not just for guitar/bass but also for my modular synth. There are a couple of CV controlled PT2399 projects out there, and usually the gnarly edges of the range is what makes this interesting (maybe harder to do in a stompbox).
The Hordijk Zeitgeist and NLC Delay No More take this to the next level
Nonlinearcircuits has more, REALLY WILD, stuff, also PT2399 based
https://www.nonlinearcircuits.com/modul ... ay-no-more
"It crackles....., but that's ok"
- cspar
- Breadboard Brother
I can confirm that the boards Rockola has shared work.
The one I built is on the noisy side, but I have almost all the wiring offboard in a 1590bb and my pt2399 is from a low tier on the supply chain.
The one I built is on the noisy side, but I have almost all the wiring offboard in a 1590bb and my pt2399 is from a low tier on the supply chain.
"There is discussion, brainstorming, disagreement, testing, verified layout and schematic. We are the fucking stompbox university -- only for those who still read though..." - Modman