So, one rather breezy spring evening I find myself quite bored at my workshop. While searching for something interesting to do, I realize that it would probably be such great fun to do some espionage. As my physique isn't suitable for the fast paced action of MI6, I realized I could still follow my dreams of industrial espionage by reverse engineering something I value dearly. And thus, this thing was born.
Fast forward 3 months, skipping the meticulous tracing and quite baffling confusion (due to some rather unorthodox component choices), let me present to you the cleaned up version of Olegtron 4060 v1 schematic!
Due to not being able to upload PDFs on this forum, here it is as a pretty little picture. Published with permission from Olegtron, and with extreme gratitude to him for creating this magnificent beast.
This includes both starve and frequency CV mods for those control voltage lovers.
After consulting with the main man, it was decided that the connection between Q1 pin 1 and SW1 pin 1 should be cut and instead Q1 pin 1 should be connected to STARVE+. This should result in the starve CV in reacting to the amount that starve knob has been turned to, instead of just flat out refusing to accept the knob's existence altogether.
Is there any chance you could share a larger version of your schematic as I'm struggling to see it?
https://drive.google.com/file/d/1iw98AfLAO8fIwkSzHFOFGmY3mlQtpwgn/view?usp=sharing Here's the link to the PDF. Though, I really recommend investing to the true and tested original Olegtron 4060!
Thank you so much for sharing this. I'm considering buying the MK2 but wanted to play with the original on a breadboard first.
@Carl Johnson Hehe no prob :) Ps. If you own any eurorack or other synths with CV-outs, I DEARLY recommend the 4060E. The Divider expansion in 4060E is a godsend <3 <3 <3
@Baron von Pooppenstein I put the circuit together and it works great, thank you. I'm amazed these things aren't better known as they're so simple yet can do so much. Would you object to me sharing your schematic (full credit to you & Olegtron of course)? I feel sure that even though it means you can make your own, it will develop more interest in the brand & their products. I tried the CV mod but it generates a drone that is present regardless of whether you have patched anything or not so I need to go back over my work and find out where I've gone wrong.
Hi!
Thanks @Baron, sir, for posting the schematic! The whole concept is namely open source, but I never managed to publish the schemos... I suck in on-line presence, sorry for that.
Any ways I plan to release the MK2 schematics soon with some explanation on the working principle. In the meanwhile please use and share the Baron's MK1 schematic, or rather a link to this forum! Just bear in mind, that the CV-inputs are based on a quick and dirty module I whipped up for mr. Pooppenstein some years ago. So component values and all might need to be checked. Please let us know if you make some progress with that! I am planning to use H11F1 as the CV-to-resistance converter in the future versions of 4060E, but that's in the future :D
I'll be happy to point people this way. I haven't found time to look at the CV side yet but have just ordered a couple of cheap H11F1's to have a play with them. I eagerly await the MK2 schematics. Thank you for sharing your work.
@Carl Johnson Did you ever manage to get CV control for freq with the cheap H11F1's?
I was distracted by other projects, which is so often the way with me so I haven't tried them yet.