Recent content by Cybercow

30 positions won't work. The FV-1 requires 8 or less.

Ack! You guys are right. Thanks for the catch. I copied/pasted the wrong part number when responding. Ive edited my original response to correct.

The MC1439 should sub nicely for the NJM5534D. The only significant difference between them is that the NJM5534 has a Slew-Rate of 13V/µs with a BJT (low impedance) input while the MC1439 has a Slew-Rate of 6V/µs with a BJT (low impedance) input. The difference is not retable by the human ear...

I do not have a sample drawing. The site I posted above has some SpinCAD file example links on it and you should be able to open those directly into SpinCAD. Do the reading. Nothing replaces that. ;)

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" . . . .