My build of the Mad Professor Deep Blue Delay (PedalPCB Seabed)

[darwin999]

Build Rating

5.00 star(s)

This is a great sounding decay pedal, I'm very happy with it.
Standard 125B with vinyl-cut labels + one layer of clear coat.
The back already has some dings in it from using it...

 

[DailyDovetails]

Your vinyl comes out well. I always found the weeding process to be a little frustrating. I did a QR code once and have been a little turned off with the process since.

 

[darwin999]

I always found the weeding process to be a little frustrating. I did a QR code once and have been a little turned off with the process since.

Thanks!

I fully understand and agree weeding vinyl on small/complex images can be very frustrating. I use vinyl simply because I have the cutter, and don't have a color laser printer and I only make boxes for myself (and the occasional relative/friend). I would never use vinyl for lettering if I was making & selling lots of boxes. I will say that my weeding became significantly easier when (1) I switched to Make Market band permanent vinyl (which is thinner that many other brands), and (2) I spent some time to fully optimize the cut settings (HUGE benefit).

But complex images like a QR code are still going to involve careful work. The small lettering on the front panel of my Royal Velvet OD took some TLC, too. (see https://forum.pedalpcb.com/threads/...pedalpcb-british-royalty-od.21182/post-267727). I find weeding small features on white vinyl to be the hardest, because the backing layer is also annoyingly white - making it a challenge to see what's not been weeded vs what has.

 

[Zanshin]

@darwin999 what are you using for the clear coat?

 

[darwin999]

@Zanshin - I use this stuff, which leaves the vinyl alone provided I don't coat too thickly and the temperature is at least 60°F. I also like the satin finish, which has enough sheen to look nice, but not so much that it highlights every little surface defect. I found some of the other brands I tried would attack the vinyl adhesive, causing the edges of the letters to curl up. (You can press the edges back down using a med temp clothes iron, and then recoat - but it's not as clean in appearance.)

.

 

[Zanshin]

Thank you

 

[keevohn]

I'm curious... What's the purpose of the resistor and jumper wire on the input jack?

 

[darwin999]

I'm curious... What's the purpose of the resistor and jumper wire on the input jack?

Wow, very observant of you!
I just put a resistor across the switched pins in case the input cable somehow gets accidentally disconnected, the input is then nominally shunted by the resistor and thus it avoids any blowout noise. Since it is on the switched pins, that resistor is completely out of the circuit when the input cable is connected.

[edited typo]