A simple LFO circuit, ready to go for Skiff Eurorack (8HP, +/- 12V, less than 30mm deep)

Features:

• Simple through hole construction
• Range for overall LFO frequency
• Triangle and Square with 0 crossing and 0-5V bias
• Easy to use

Please read this blog post for more information about this project: https://audiodiwhy.blogspot.com/2021/09/lfo-prime-reverse-engineering-my-own.html

You will need 2 PCBs for this project. The Gerber zip is a zip of 2 gerber (zip) files--front panel and main circuit board. Suggestion: for front panel use a black PCB with white silks. I have also included a BOM and PDF of boards and the schematic. Note that the BOM for Euro version is slightly different vs. the blog posts, which is Frac format.

Update 7-24-25 I am trying to fully ditch Eagle since their license price goes up soon. Therefore I have uploaded a Kicad 9 EDA port of this project. Warning: I have not fabricated the Kicad designed boards yet nor printed out PCB and overlaid the front panel design using sheets of paper to make sure everything lines up OK (I think it will, but would want to check this carefully before spending a bunch of money of fab). I'd recommend opening everything in Kicad, doing a 1:1 print, and making sure it does, before spending any money for the Kicad port. If you still are with me--See "LFO Prime Ported to Kicad 7-24-25" below for Kicad 9 files for the project.