The simplest solution that comes to MY mind is attached Perhaps invert the input and sum it back in to the ECHO signal to only get "everything else BUT input"? (but that would in some cases kill the feedback frequencies as well?)ĭoes anyone know of a PT2399 design where someone has already figured this out? Maybe something simple I am missing? I'd want to get rid of the source signal somehow and just end up with the rest of the echo signal (so-what goes back into pin 16, controlled by the feedback pot, only), but I can't see how you can do that w/ the PT2399 I see Befaco has that on their "Crush 3" PT2399 but I can't understand how it works-seems like they use two stages of a 13700 OTA for this, but still, not sure. Question, I want to add a wet/dry control to a PT2399 design. I already have a simple effects send/receive where you put a VCA into the echo loop for CV control of echo (turns out: really easy mod). I am now beginning the process of modding this circuit. I've built up the PT2399 based on the factory spec sheet as a start. Cool and the gang! Hope your builds are going well. Interesting to know about your PT2399 with diy vactrol control. I have had bad luck with double sided etching - probably because I tried some smt! Was just not forgiving enough on the lining up. I actually meant to link to the PT2399 VC on Joe's github (and yes this one is not the eagle files but for diy etching): I also used the ljn to log pot hack for the inout attenuator as it unsurprisingly seems to give better led drive response. I used the 'voltage to resistance' schems from īasically used the most complex one but with just one attenuated input and a trimpot and wired the resitance directly across the feedback and delay pots, so the original pots act as a preset level. Its far from smooth or linear or logarythmic in its vc response, but it does well enough for a cheap board with 2 stripboard daughterboards for each vc input.
I should have also said I just bodged together a working vc pt2399 with one of the many simple circuits available (probably the same as the el cheapo complete board linked to above) and with fully homerolled diy vactrol control. There are also panel designs I think.Īnd there are many other classic module designs for eurorack on Joe's Github.Īctually, i think that pt2399 he has is more or less the standard datasheet pt2399, although he does include the vc version elsewhere on his github which is available elsewhere, but not as eagle files, just the b&w artwork.īut thanks.for linking, he does have some good stuff for me to tinker with, and to do some dual sided etch tests without the work of laying them out fully.
Pt2399 simple delay schematic for free#
You can download the Eagle software for free then load Joe's PT2399 design, convert it to Gerber files and send it to a pcb making house like OSH Park. Joe Beuckman has very generously posted his Eagle version of the Scott Bernardi PT2399 VC Echo on GitHub. I haven't made this one yet, but it's on my to-do list: I'll order someone within the month to toy with, I'll report back when I have some sounds to share. After listening to some electronic noise, I love delay vibes. I'm looking forward for the delay feature. Synthrotek offers a kit as well, but it's $30.
Pt2399 simple delay schematic plus#
Havent built it yet, but for $2.86 print plus components.Īfter combing through ebay, seems like the guitar pedal community has many pt2399 options. Works on 12V (replace 47k next to purple in front of Mix Pot connections with jumper) Silkscreen/wiring plan shows potentiometers represented seen from the bottom view not the top view. Resistor marked free will set the range of your delay pot (use 100k pot), use 25K trimmer so there is no dead space when you turn the pot. So no need to connect anything to the 'digital gnd' pad. Pin4 on the pt2399 is digital ground and is connected internally to pin3 (analogue gnd) via approx 10 ohm. The regulator circuit is separate from the main circuit so jumper from +V to non-reg in and jumper from reg 5V out to direct reg 5V in. See some notes from the forum (not mine): There is also the "Zeitgeist" pt2399 circuit about here somewhere on E-M.Īttached is the Scott Bernardi circuit, a well known one. SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube
No stripboards but I was actually looking for a simple PT2399 circuit yesterday and came across this one: Has anyone have an circuit/stripboard layout with the pt2399? If not, I'll take my time and make my own for fun. Mark the topic unread :: View previous topic :: View next topic Register Profile Log in to check your private messages Log in Chat Roomįorum index » DIY Hardware and Software » The layout factory
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