2x2399 in series delay with current mirror setup for long clean delay times. Note that Rate and Depth pot is wired backwards in the schematic. Changed it for the layout and also subbed the 1mA pots for 1mC's.
Schematic is avaiable HERE.
2x2399 in series delay with current mirror setup for long clean delay times. Note that Rate and Depth pot is wired backwards in the schematic. Changed it for the layout and also subbed the 1mA pots for 1mC's.
Schematic is avaiable HERE.
Self oscillating reverb with plenty of bells and whistles.
Schematic, writeup and demo is avaiable HERE.
As promised, another circuit by Scientific Guitarist.
Shematic and build docs can be downlöoaded HERE.
A DIY project that looks pretty cool, a PT2399 Oil Can Delay emulator...
Schematic and a writeup is avaiable HERE.
Another trace, layout and verification by Jordan Fontaine. A PT2399 based delay but it has a trick upon its sleeve that I haven't seen elsewere, the Slam switch.
Schematic is avaiable HERE.
Here is a contribution from Jordan Fontaine, a modified Mid-Fi Clarinot)
Modded Midfi Clari(not)
This was a fun project to delve into. I certainly didn’t stay true to the short delay, tape warble aesthetic. The delay still does that sound but now it can run wild too. Very versatile now for rockabilly, dub, shoegaze etc.
Delay time is extended and feedback added to extend beyond a single repeat.
The trimmer sets the threshold for runaway repeats to taste.
I borrowed the blend for Midfi’s Pitch Pirate so there are more sounds available here.
If you have runaway repeats happening and dial the blend close to dry it almost sounds like a scratchy record under your playing.
The fuzz control from the original has been removed to add to the ‘clean’ sound of the pedal. Although the longer repeats will add noise and clip as well.
Where the crazy comes in is the external mounted LDR. The second footswitch engages the LDR and affects the Delay control as you interfere with the light in front of it. The Offset control allows for the light to make dramatic or subtle changes to the time. This is easily omitted if you're not interested in it.
Another contribution by Jordan. Thanks mate!
Chris "SPIN Doctor" Stelloh did it again! Amazing work with this box of fairy dust and chaos. The layout is verified and good to go!
Chris just sent me an another Spin FV-1 based layout. And he verified it.
"This is a layout for the Earthquaker Organizer Polyphonic Organ
Emulator that I drew up using the Pedalpcb schematic. Two things about
this layout (which is verified - I have all ready built it):
1) it addresses the volume drop issue that was common in early traces of
this circuit. The pedalpcb board now has a 20k trimpot to solve this,
which I have simply converted to the 20k resistor that is on pins 13 and
14 of the quad op amp.
2) you will need some supplies - an FV adapter and the EEPROM with the
algorithm - which I would recommend getting from pedalpcb. PCB Guitar
Mania makes a clone of this but I did not see a listing on their site
for an algorithm chip or an SMD adapter. The FV-1 adapter board that
pedalpcb makes is quite easy to use and I would also recommend watching
DK Pedals' tutorial on YouTube for soldering the FV-1, as it was very
helpful to me. The EEPROM algorithm chip is available for about $6.00
and if you search 'Organ Donor EEPROM' you will find it. It is not
listed on the regular EEPROM menu. Also - 2x14 rows of pin headers will
be needed to go between the adapter board and your vero."
Here is another great layout by Sebastian!
In his own words...
Just wanted to share a layout I did of the RE-20 circuit from the 1776 Multiplex Echo Machine. It seemed like there aren't a lot of options for delay effects with parallel, independent delay controls. For the sake of simplicity (and a layout that would fit in anything smaller than a shoebox), I haven't included either the speed-ramp circuit from the original Multiplex, or the modulation circuit from the Multiplex Jr.