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    pt2399 use ?

    Belton Brick uses three, at slightly different VCO speeds, to simulate real springs.
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    pt2399 use ?

    Some of us use the clones here as a launching point for doing mods, it's faster to start with a board ready-made. It's also fun to make combinations of the boards here, in larger pedal boxes. BTW, a shame about PPP doing the 25 minimum thing. I will peel their sticker off my car. .
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    pt2399 use ?

    Thanks for the input, everyone. I will start looking at the items you listed.
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    pt2399 use ?

    Do any of the PPcb projects use a PT2399 ? - just curious - and if not, why ?
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    Tap Tempo Delay

    I'm doing something with an external microprocessor called Teensy (Arduino-based) that takes over the pots, the switches, and the master clock. It can mute or reset the fv-1, monitor the audio signal and clipping, switch effect eeproms on the fly, tap tempos, and remember your settings as a...
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    Tap Tempo Delay

    PedalPCB- are you folks still working on tap-tempo ? Are you using an external cpu to calculate, or an fv-1 eeprom program ? Will we see it for sale soon ? (love the idea)
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    CDXL Vactrol Orientation

    May I suggest, insert a regular red LED in the holes without soldering, to test the VACTROL orientation for actual functionality. This is how I discovered I had a bad board in the first place.
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    CDXL test … and a question for anyone building it -

    *** Is there an easy way to determine if these are indeed the earlier boards ? *** If so, I bought two of 'em, and would enjoy having the corrected boards sent to me : Order #27399 was placed on October 9, 2019 and is currently Completed. If you want to throw in a couple of Arachnid boards...
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    CDXL test … and a question for anyone building it -

    I put a red led in place of the vactrol to see how sensitive the input is on the CDXL circuit. Well, the answer seems to be "zero" - no LED flashes at all. The LED dimmed with the "range" knob, but never flashed. I removed the 4.7 uF cap from the board, and measured - pin one of the tl072 is...
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    CDXL Envelope Filter

    Can we post schematics from other places ? I believe this is very, very close to what you want. Use Xvive Audio VTL5C3/2 Dual Element Opto-Coupler.
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    EEPROM selection PCB

    THAT is a VERY important question ! What are the dimensions of the switch-mounted eeprom board ? Must it occupy space near the stomp switch where there is no PCB above it ? What is the height of the socket-mounted onboard assembly ? What keeps it firmly mounted to the DIP-8 socket ? PPCB...
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    Arachnid 2019 Board, "using all 16 effects" mod

    Chuck, how did you wire the expression pedal onto the arachnid ? Is it part of one of the three effect knobs ? I've thought about doing this, and would like to hear your ideas.
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    Two-Speed Rotary Speaker (Leslie-style) sounds ?

    I watched the same video, and thought "what a crappy way to demo a keyboard effect" (using a guitar).
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    Two-Speed Rotary Speaker (Leslie-style) sounds ?

    I looked and listened on YouTube. My vote goes for the SpinCycle pedal from Experimental Noize. It's a bit larger footprint than the boards I see here, possibly it could be adapted to a smaller size. It seems to use a combo of analog distortion, digital LFO effecting both volume and phase...
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    EEPROM selection PCB

    I'd say option two, because when you use I2C (SDA, SCL) between two chips, it's best practice to keep all connections as short as possible, and not to run the 2-wire signal through physical disconnects; sockets introduce problems, as do separate ground planes. Even at the protocol's lowest...
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    EEPROM selection PCB

    Whichever choice, make sure to leave enough vertical space for an 8pin dip socket on one side (or both), so we can swap eeprom chips as you make new sounds available. I'm certain I'm not the only person who sockets their eeprom chips here ?
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    Arachnid 2019 Board, "using all 16 effects" mod

    So I'm sure it's been discussed somewhere, that pin 13 of the FV-1 chip can be grounded to use the 8 internal programs on the FV-1. I'm sure folks here have added a toggle switch to ground for switching "banks" of eeprom using this pin 13 trick. So, the MOD I'm actually bringing up is …. that...
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    Two-Speed Rotary Speaker (Leslie-style) sounds ?

    I was imagining not stereo, but woofer and tweeter outputs from the rotary cabs. Now that I imagine stero, FV-1 can do that as well if you use both outputs. VERY NICE lyra 2-speed circuit you suggest, and it could include an extra pot for spin-down speed, discharging the electrolytic more...
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    Two-Speed Rotary Speaker (Leslie-style) sounds ?

    Jaga- I'm all old school, I like the Hammond + Leslie sound. I also dig stuff like that Rototron, if one must simulate a simulation. :) To do a rotary speaker simulation justice you need a foot stomp switch that switches from slow to fast speed "rotation" slowly , say 3 seconds of rotary...
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    Two-Speed Rotary Speaker (Leslie-style) sounds ?

    Thinking of the Organ Donor pedal. I built it, I love it, but I would love it more if I could run it into a rotary speaker sim with 2 speeds on a stomp switch. I'd guess that other keyboard players would also be interested ?
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