Duocast spec'd capacitors

[dmp]

The pcb and build doc specifies 5mm, 35v capacitors in 330uF, 120 uF, and 100uF
I don't think these exist in that small a diameter?
I guess you have to kludge in a larger diameter cap.

 

[Synchrony Pedalworks]

I have this PCB too and wondered the same thing. I haven’t gotten the recommendation enclosure (1590BmM/Gorva S90) to measure it. I was going to check some of the build reports to see if anyone mention it or I could see the caps. I also wondered if a tantalum cap would be smaller and work.

 

[Harry Klippton]

I asked this a few months ago and the answer is no. You just gotta clown car them

 

[dmp]

Lame
It would be nice if the designer considered the availability of components when making a layout.
Even a little experience in electronics and you'd know not all electrolytics can be 5mm

 

[JamieJ]

If you look at other build reports they fit just fine but are quite snug.

 

[benny_profane]

The simulcast is being/was redesigned to accommodate the caps better (among other changes). The duocast may have a similar redesign.

 

[dmp]

When I get the pcb I'll see what will fit

 

[Synchrony Pedalworks]

Found this thread with the answer: https://forum.pedalpcb.com/threads/what-caps-are-supposed-to-go-in-the-duocast.13258/

Looks like the big caps should fit in the recommended enclosure.

Mr. PedalPCB does a some of the best work with his layouts and part selection, so I thought that the bigger enclosure would accommodate the bigger caps.

 

[szukalski]

You can make a lot of space by leaving out the transformer and jumping across where it would go. Sounds the same, cheaper to build. Probably get it into a 1590BB as well.

 

[MichaelW]

DIY = "Do It Yourself" = use a little imagination and figure it out. Or.....ask a question without casting aspersions....no need for that.
The big ass 330u will fit. (See below).

 

[Robert]

Even a little experience in electronics and you'd know not all electrolytics can be 5mm

It's not the end of the world if the capacitor overlaps the little circle printed on the PCB.

They'll fit fine, but the layout is being updated so they'll fit "better". (including the transformer)

 

[Harry Klippton]

The layout is being updated so they'll fit "better". (including the transformer)

This is great news

 

[Robert]

But for the record...


Far from the most common, but they do exist.

 

[MichaelW]

Ok, here you go, did your research for you.

I found the blue Matsushita ones after I made the newbie mistake of ordering the Nichicons without checking the size off Amazon

So as a person "with very little experience in electronics" I was able to find a solution pretty easily.
Here you go, Ross @StompBoxParts has them.

But as mentioned, the big honking ones fit too...

 

[dmp]

This design has a DC voltage of 27v, so I would not use a 25v cap like that blue one.
Even the miniature Nichicons are 8mm, not 5mm. But no need to keep debating it.
Nice that the layout will be revised.
When I get the board I'll figure out the best thing to do with what will fit.

 

[dmp]

But for the record...

Far from the most common, but they do exist.

Post a link to that 5mm cap please. I tried a reverse image search and it didn't lead to any suppliers

 

[Robert]

Post a link to that 5mm cap please. I tried a reverse image search and it didn't lead to any suppliers

I'm not sure about suppliers, I just know that they exist. I've seen them as high as 1000uF in similar footprints.


8mm will easily fit with absolutely no interference from adjacent components.

 

[MichaelW]

Link

 

[dmp]

8mm Pananasonic FC (105C) caps fit pretty well, from Mouser, these are 35v or greater other than the 47uF (25v)

EEU-FC1V121BJ

EEU-FC1H100L

EEU-FC1E470

EEU-FC1V101

EEU-FC1V221LB

EEU-FC1V331LB

 

[szukalski]

Great! A lot of worry about nothing Lots of space for that transformer you have there.

Did you try an A/B test with the transformer bypassed?