Haible Morphing Programmer resistor value

vladosh

i just made an ugly PCB layout for Haible's Morphing Programmer ,i wanna make it standalone ,but i wonder about the resistor next to the Initial pot ,is it 330K as i think or it maybe is 220K ,anyone built this or have any idea ,here's the page for the Morphing Programmer
http://jhaible.com/legacy/tonline_stuff/morph.html

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L´Andratté · Posted: Tue Mar 12, 2019 4:12 am Post subject:

Hey nice, I have always been interested in that circuit but never built it.
Maybe you already built it, but the resistor is definitly 330k: in conjunction with the 220k fb resistor this gives +/-10V output from the +/-15V voltage source(pot), this is also confirmed by the zener´s value. 220k would also give +/-10V, but clipped by the zeners, so your pot would have dead zones at start and end!

If you found that circuit useful (or not), please report! Very Happy

vladosh · Posted: Wed Mar 13, 2019 12:54 am Post subject:

it's funny so few people if any have built this circuit and it's functions appear really interesting ,i made a pcb layout for this as standalone ,but have not built it yet ..thanks for taking a look at the values ,i spoke with few people about those here in chat too ,hope to build it soon and see how it goes