This kit can be purchased on my Tindie shop: www.tindie.com/products/27865/ This design can also be found on my GitHub: github.com/tkilla64/eurorack/tree/main/vc-lfo
It would be great to see a tutorial on designing and fabricating the front panels... presumably they're made in FR4 at the same time as getting the PCBs fabricated? Are there any public domain blank panels out there that we can use in KiCad?
That's a great idea. I have been experimenting with exporting the panel outline in SVG and DXF but I could not get it to work the way I wanted in KiCad 5 - the files where rejected by manufacturers or the dimensions where totally off. Haven't tested KiCad 6 yet. An alternative way would be to upload the KiCad files of a blank panel (without any artwork) to GitHub. I have made lots of special footprints, for holes and cutouts, so these need to be included as well.
Got this one built, now, too. :) Couple questions: 1. With the hi/low switch, I left the notched washer in place, but just turned it upside down since there wasn't a hole for the notch/protrusion/whatever. Does that seem like the right thing to have done? 2. I managed to figure out that you're using the QingPu WQP-PJ398SM as the mini phone jacks... and I kinda like them! Where did you source them (or, more to the point, do you know somewhere I could source them in the U.S.? But I'm guessing that's something you're unlikely to know), because I could imagine maybe wanting to incorporate them into future designs, and I couldn't find them on digikey, mouser, or even octopart... not an exhaustive list, but those are the ones I know well enough to rattle off off-hand. :) Anyway, while I alas haven't had a chance t fire these up yet, because I don't have all my power stuff together just yet, I'm excited to do so soon, and I'm really liking them from an aesthetic standpoint, so... nice work, and I hope you'll keep it up. :)
Nice progress! 1. When I build the module I leave the large washer with a notch out and trim the height with the bottom nut, but it's perfectly fine to do it your way. 2. You can buy them from Thonk is the UK. I think modularaddict.com carry them. They are also called Thonkiconn jacks.
Yeah, that's a relics from back in the 80's - I still got some old tools that I bought second hand from my first workplace... Yes, it's a triangle core and I'm using a switching FET for the reset.
@@AnalogDude_ The best way to describe it that the triangle is full-wave rectified and the leading edge is inverted. This will give a sawtooth that run with twice the frequency of the triangle - so I'm not doing the offset and stitching of the sawtooth (that many oscillators). For the sake of simplicity. The schematics are on my github.
@@MeeBilt cool, stitch, never thought of that "name", but i did "invent" this circuit to have the same frequency. you could also use a CEM3340/AS3340, i guess.
This kit can be purchased on my Tindie shop:
www.tindie.com/products/27865/
This design can also be found on my GitHub:
github.com/tkilla64/eurorack/tree/main/vc-lfo
As always beautiful and informative video! 😀
Thank you very much for those nice words, @malrex0mari !
It would be great to see a tutorial on designing and fabricating the front panels... presumably they're made in FR4 at the same time as getting the PCBs fabricated? Are there any public domain blank panels out there that we can use in KiCad?
That's a great idea. I have been experimenting with exporting the panel outline in SVG and DXF but I could not get it to work the way I wanted in KiCad 5 - the files where rejected by manufacturers or the dimensions where totally off. Haven't tested KiCad 6 yet.
An alternative way would be to upload the KiCad files of a blank panel (without any artwork) to GitHub. I have made lots of special footprints, for holes and cutouts, so these need to be included as well.
is there a through-hole replacement for the BSS138 that will work in this application?
The 2N7000 should be possible to use here
Got this one built, now, too. :)
Couple questions:
1. With the hi/low switch, I left the notched washer in place, but just turned it upside down since there wasn't a hole for the notch/protrusion/whatever. Does that seem like the right thing to have done?
2. I managed to figure out that you're using the QingPu WQP-PJ398SM as the mini phone jacks... and I kinda like them! Where did you source them (or, more to the point, do you know somewhere I could source them in the U.S.? But I'm guessing that's something you're unlikely to know), because I could imagine maybe wanting to incorporate them into future designs, and I couldn't find them on digikey, mouser, or even octopart... not an exhaustive list, but those are the ones I know well enough to rattle off off-hand. :)
Anyway, while I alas haven't had a chance t fire these up yet, because I don't have all my power stuff together just yet, I'm excited to do so soon, and I'm really liking them from an aesthetic standpoint, so... nice work, and I hope you'll keep it up. :)
Nice progress!
1. When I build the module I leave the large washer with a notch out and trim the height with the bottom nut, but it's perfectly fine to do it your way.
2. You can buy them from Thonk is the UK. I think modularaddict.com carry them. They are also called Thonkiconn jacks.
@@MeeBilt 0; 1: Thanks! :)
2: ooh, cool... another name and such seems potentially helpful. I'll see what I can figure out. :)
i like that screwdriver.
: )
You might wanna use a Red/Green bi color led.
is it triangle core? and what do you use to reset, a fet or transistor?
Yeah, that's a relics from back in the 80's - I still got some old tools that I bought second hand from my first workplace...
Yes, it's a triangle core and I'm using a switching FET for the reset.
@@MeeBilt how you derive SAW from Triangle?
@@AnalogDude_ The best way to describe it that the triangle is full-wave rectified and the leading edge is inverted. This will give a sawtooth that run with twice the frequency of the triangle - so I'm not doing the offset and stitching of the sawtooth (that many oscillators). For the sake of simplicity. The schematics are on my github.
@@MeeBilt cool, stitch, never thought of that "name", but i did "invent" this circuit to have the same frequency. you could also use a CEM3340/AS3340, i guess.
Already out of stock
There are more on order that will arrive soon.
does the motherboard on your site already come with the smd's built in?
Yes, they are already soldered to the PCB, so you will only need to assemble the through hole components.