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You cannot get ±3 octaves with an FV-1. At best you can get about -1.2 octaves and +2 octaves. I suggest playing with each block's settings. By clicking on a placed block, you see a dropdown that shows any options for that block. Several have a "Settings" option that you can explore. There is...

AI transistor radio design. I believe our jobs/hobbies are safe for the time being. Thank you AI!

Try these two patches. They were created in SpinCAD 10.42 You can tweak them to suit your tastes. Pitch_Oct_Up_Dn.spcd Pitch_Oct_Up_Dn_02.spcd

4 years ago I procured a couple MadBean 2015 "Honey Dripper" (Colorsound Dipthonizer) PCBs for a custom commission request and got it built out with the requested modifications. This is a sweet, versitile auto-wah sort of circuit from the 70's. Instead of a single, fixed filter, it has a...

From what I can make of the circuit, and your expressed experience, I'd say it's performing as it should. Only one LED lights up at the start is likely just the initialization voltages. Once the circuit gets a signal, the LEDs should flicker a bit, each of the two LDR/LED pairs each manipulating...

I've always like the filtering system at Mouser. And TBH, it does seem to work faster now and the returned results are less filled with chaff. DigiKey has always been very slow for me (still is - I'm thinking it's my location) and use it rarely.

Very clean and aesthetic build. Well done!

All JFETs exhibit interchangeable source & gate pins. It the nature of their design.

I posted this in one of the other threads you're engaging . . . . Try this bank for the VF-1. Mind you, I think you'll need version 10.42 of the SpinCAD app. One of the patches doesn't work and another is blank. But the others should get you started. One of the patches uses the "Pitch Up Down"...

I wonder if the extremely low slew-rate (0.3V/µs) of the LM358 (IC1) would have any significant bearing on the issue?

Way up north in the upper peninsula of the upper peninsula of Michigan, there's this little old mining/smelter town called "Gay" . . . .

Fair enough. I get it. Some long-haul projects can were a person down. I'm aging out too and just like to keep my whistle wet. Your SpinCAD is still a great tool to explore and toy with. And thank you for your response.

Out of severe curiosity, any further progress with the ChatGPT optimizer thingy?

Here's an image of the SpinCAD screen for the DualTrack.spcd that can get you started. Play with the different Pitch blocks.

Try this bank for the VF-1. Mind you, I think you'll need version 10.42 of the SpinCAD app. One of the patches doesn't work and another is blank. But the others should get you started. Click to Download=> Pitch_Shifter_Examples_02.spbk

Right. Most of the myriad of FV-1 patches out in the wild are in SpinASM format. Unfortunately, SpinCAD does NOT read SpinASM files. SpinCAD WILL output SpinASM files, but it cannot read them. I'd love to find a SpinASM to SpinCAD converter routine. I suck at coding in SpinASM. But with Digital...

There are several web sites with SpinASM patch files for the FV-1 where you'll like find an .SPM file to your liking. But, from what I know of SpinCAD and SpinASM, SpinCAD can generate SpinASM code, but SpinCAD cannot read SpinASM code. Is that what you're wanting to do?

Depending on your DMM, it might be loading the measurement. To set it by ear, start with the trimmer set in the center and slowly test for squishiness as you slowly turn it to one way or the other with the Gain control turned to full CCW. With a Vgs(Off) of -1.10V, I'm guessing the trimmer will...

Just when the world starts trying to go paperless . . . .

You should be able to write directly to the EEPROM from SpinASM by ticking the "Write EEProm" box at the bottom of the SpinASM interface. But that might be dependent on you chip writer hardware/firmware.