Klee, panel sketch #1
Panel layout starting to take form.. To aid laying out a design, I decided to add a separate layer to the sketch just for drawing in the mechanical dimensions of all parts (knobs, solder lugs etc). A bit of extra work, but it’s definitely way easier to place parts when you have a visual confirmation that the clearances are ok. In the sketch, this layer is the cyan-colored one.
Other layer colors here are violet for PCBs, green for sub panel and yellow for front panel. The PCBs are supposed to stack up with the panel eventually, but positioning these three together will be about the last bit. Less clutter this way.
After getting started with sketching the layout, I shortly after decided to venture away from Steve’s design I mentioned previously. Thing here is, the option of both desktop and rack installation got too tempting to pass by altogether. Had I strictly followed the initial plan, it would’ve called for a way taller panel than I’d like (read: desktop version using more space). So, I started testing what rack unit compatible height would be optimal in regard to panel size. 4U was the answer; this roughly corresponds to 17.8cm. Still pretty ok for desktop too.. In the picture above, you can actually see the rack ears (minus mounting holes) as separate rectangles on both edges of the panel.
Briefly describing the “blocks” on the panel, there’s the step section (sliders, switches and LEDs) in the middle. Underneath this are the Master and Bus 1/2/3 Gate + Trigger outs with their indicator LEDs and merge switches. Step & Load buttons and input jacks are on the left. To the right of step section, there are A / B / A+B outputs (with and without Glide adjustment) and Range controls. My overall plan with the layout is to have all jacks next to the edges and not “among” the controls (eg. middle of the panel). This should help avoid blocking out controls when inserting cables.
I’m still uncertain about what parts to use in a few spots (eg. Step / Load buttons), so the layout is definitely not final. Also, some jacks could also be rotated, panel needs to be checked for labeling clearances and whatnot.. What part is already proving a bitch to source, is the SP8T rotary switch. I’m able to find plenty of SP6T and SP12T ones, but not a single (in-stock) SP8T. With this part missing, completing the panel design could easily grind to a halt.. So, if you know a good European source online, tips are highly appreciated. Just leave a comment :)