While I'm waiting for parts for the others, took a trip on this one. After a bit of a fight (debugging process mostly), the monster comes to life. Tag it! Congratulations, You did it again!
For the record, I had only one LM833 and one TL072, both bad parts for my misfortune, so I found after hours of batle. It happens not seldom, I think, with everyone (and the layout often gets the blame...). So I ended up with LF353 (on place of TL072) and NE5532 replacing LM833. Most important: it does'n't worked with LM324, but with LM324A (keep the warning). The final result was frankly awesome. Much better than in Youtube. Love it! Cheers!
Interesting bit is you have the diodes on the Repeat knob as I would have done, to limit the repeat volume/add grit for high repeats. In the pedalPCB schem and on the board (shown in their pdf), they have the diodes in the same orientation. So you'd only get one side of the waveform clipped... but with the diodes in parallel you would get clipping at a higher voltage right?
Yes, I think so but it appears that the first run of PedalPCB and the schematic had one of the diodes in the wrong direction. According to Bugg the diodes should be arranged as clipping diodes per the layout above.... https://forum.pedalpcb.com/threads/dark-rift-delay.4499/#post-36801
for anyone who is interested - if you want to add a modulation rate LED, you only have to put the anode to pin 7 of the LM324 and then attach the cathode to ground
Sadly, not having any luck with this build. Built two, one sounds great, up until the 47k resistor that connects to the 22k resistor and pin 6 of the TL072. It then only passes clean signal, but on the other side of the 47k that connects to the 1uF, I can hear the delay and modulation perfect. Checked for shorts, and wrong component placements but really can not seem to figure it out. Will post if I get it working, the other one I built passes no signal at all, but that was probably an error of mine. This is why I do not like doing big stripboard builds. They never end well
I'll keep combing - but double check those 15k resistors. Might just be the photo playing tricks with me - but your red bands on the other resistors are pretty bright and that sure looks like brown - green - black - brown - brown - which would be 1.5k
Just confirmed, they are indeed 15k resistors. Guessing you could not find anything? so strange. This build was a lot of work so honestly reluctant to build another
I've just built this and it sounds pretty cool. Only issue is that the actual delayed signal is very low volume. I'm not sure if this is an issue in my build or it would be expected for this circuit. Anyone else had this issue?
While I'm waiting for parts for the others, took a trip on this one. After a bit of a fight (debugging process mostly), the monster comes to life. Tag it! Congratulations, You did it again!
ReplyDeleteFor the record, I had only one LM833 and one TL072, both bad parts for my misfortune, so I found after hours of batle. It happens not seldom, I think, with everyone (and the layout often gets the blame...). So I ended up with LF353 (on place of TL072) and NE5532 replacing LM833. Most important: it does'n't worked with LM324, but with LM324A (keep the warning).
The final result was frankly awesome. Much better than in Youtube. Love it! Cheers!
Wow, great job. Glad you got it working. Tagged!
DeleteOne last question: I suppose You did'n't use the same schematic as Alex (on taggboardeffects), did You?...
ReplyDeleteI think we used the same schematic, the one at PedalPCB.
DeleteThe strange thing is that he added a 5mm led and a 47n cap...
ReplyDeleteHe might had a different schematic after all. PedalPCBs is the only one I can find online though.
DeleteIs there a way to add a Rate Tempo LED?
ReplyDeleteInteresting bit is you have the diodes on the Repeat knob as I would have done, to limit the repeat volume/add grit for high repeats. In the pedalPCB schem and on the board (shown in their pdf), they have the diodes in the same orientation. So you'd only get one side of the waveform clipped... but with the diodes in parallel you would get clipping at a higher voltage right?
ReplyDeleteYes, I think so but it appears that the first run of PedalPCB and the schematic had one of the diodes in the wrong direction.
DeleteAccording to Bugg the diodes should be arranged as clipping diodes per the layout above....
https://forum.pedalpcb.com/threads/dark-rift-delay.4499/#post-36801
Thank a lot for this layout (and all the other ones), Anders!
ReplyDeleteIt's worked from the first time :)
Definitely one of the best delays I've played through! Sounds awesome! Great work!
ReplyDeleteI've tried a few PT2399 but it's really hissy. Any ways to fix that?
ReplyDeleteGood day! Is 1mC the 1MOhm inverse-logarithmic resistor? Designation symbols vary depending on the country of production.
ReplyDeleteYes, that's correct. iMC is a 1M reverse log potentiometer.
DeleteOh, thanks for reply. There is not one of them nearby)
ReplyDeleteHelo! Is this schematic above right? I've been searching for this pedal and I only found it into tagboardeffects, witch is aparently wrong...
ReplyDeleteHey! Is there any differnce between LM324A and LM324?
ReplyDeleteNo. No difference, you can use both.
DeleteThis comment has been removed by the author.
ReplyDeleteThis comment has been removed by the author.
DeleteHi! Does anyone knows how to add an wet/dry switch, just like the DBA Echo Dream V2?
ReplyDeleteSomeone?
Deletefor anyone who is interested - if you want to add a modulation rate LED, you only have to put the anode to pin 7 of the LM324 and then attach the cathode to ground
ReplyDeleteA highly unusual delay - love it. The warbling on the repeats rivals my DOD Rubberneck. Schematic worked first attempt - fired right up.
ReplyDeleteSadly, not having any luck with this build. Built two, one sounds great, up until the 47k resistor that connects to the 22k resistor and pin 6 of the TL072. It then only passes clean signal, but on the other side of the 47k that connects to the 1uF, I can hear the delay and modulation perfect. Checked for shorts, and wrong component placements but really can not seem to figure it out. Will post if I get it working, the other one I built passes no signal at all, but that was probably an error of mine. This is why I do not like doing big stripboard builds. They never end well
ReplyDeleteIf you want to link a hi res pic front and back I'd be happy to take a look. I can verify that this schematic works as drawn.
DeleteWow, that was quick. Thank you! Here the link
Deletehttps://drive.google.com/drive/folders/1-2vKoXM7gSU2vSlUBQ4ulYFcchqLnXAM?usp=sharing
I'll keep combing - but double check those 15k resistors. Might just be the photo playing tricks with me - but your red bands on the other resistors are pretty bright and that sure looks like brown - green - black - brown - brown - which would be 1.5k
DeleteJust confirmed, they are indeed 15k resistors. Guessing you could not find anything? so strange. This build was a lot of work so honestly reluctant to build another
DeleteUpdate, built a second one and it fired up right after the second attempt and just scraping the tracks. Awesome!!!
DeleteI've just built this and it sounds pretty cool. Only issue is that the actual delayed signal is very low volume. I'm not sure if this is an issue in my build or it would be expected for this circuit. Anyone else had this issue?
ReplyDelete