It was lying on my shelf ever since.
This month I made a eurorack module with it. I'll document it's making in two parts.
|Close-up of the finished panel|
The Doepfer DIY synth is an assembled printed circuit board that includes all the necessary functions to build a basic analog synthesizer: VCO, VCF, VCA, EG, LFO, you name it. You can design your own synth. All you have to do is to provide a case and all the connections to the mandatory controls : jacks and potentiometers.
Before I could get to a finished product I'm proud of, I went into a lengthy thought process.
My first idea was to make a semi-modular synth whose functions are as close as possible to an Roland SH-101.
I tried several panel designs before deciding on the final one.
XAOC Karl Marx Stadt module provided the necessary faith that I could build a 42 HP (about 21 cm) module to house the Doepfer DIY synth.
Moreover, I was inspired by the Motherfucker-19 work from YokoBoko. It helped me making some decisions on jack placement and avoiding some mistakes during cabling (not that I didn't do any…). You can find description and instructions on the module modulagrid page.
As usual, I prototyped the panel on cardboard to check my placement hypothesis. It seemed critical here. I wanted to specifically check the density of jacks on the low part and the room for the spacers to hold the board.
|Back side of the early cardboard prototype.|
|Annotated paper and cardboard proto|
Holes are 6 mm for LEDS, jacks and switches and 8 mm for pots. It is a bit large for the pots. But it proved helpful later.
It's a large sheet. So placing it parallel to the panel edges is essential. A small deviation could give an awful result.
I'm quite happy with the final result except the paper is one millimeter too much on the right and could have been half a millimeter lower.
|Bob cuts holes|
I cut the holes with an X-Acto knife. Here again Bob gave me a hand.
This is the time to place all pots, jacks, switches and LEDs. There are 51 of them (23 pots, 23 jacks, 3 switches and 2 LEDs).
As the holes for pots were a bit larger than needed I corrected the most obvious alignment problems by moving the pot half a millimeter here, a millimeter there.
|Final before cabling|