Ultra miniature Electrolytic capacitors

[Mark Abbott]

I'm after some ultra miniature 16V electro caps. The caps are for a Mad Bean Road Rage 2013, as shown in the circuit in the link, the value of the caps are 100uF and 10uF. The pcb is quite small and only the ultra miniature caps will fit.

What do you guys recommend?

https://www.madbeanpedals.com/projects/_folders/BreadBuddies/pdf/RoadRage2019.pdf

Regards

Mark

[FiveseveN]

Those look like regular 5 mm footprints, which are easy enough to find: https://www.mouser.com/ProductDetail/KEMET/ESK476M016AC3KA?qs=gt1LBUVyoHkCduGTGGubTA%3D%3D
The 47 uF even has some extra room around it so a 6,3 mm should also fit.

[Kevin Mitchell]

It's just the silk screen footprints that give you that impression. The usual 6x11mm 100uF caps should fit. The pin spacing looks right for those as well.

That link is for the 2019 version by the way. That one has a 47uF there. 5mm, 25v caps can easily be found.

-KM

[antonis]

I think OP is refered on LOW PROFILE caps..
(shorties, midgets, dwarfs, peewees, titchies...)

[Kevin Mitchell]

I think OP is refered on LOW PROFILE caps..
(shorties, midgets, dwarfs, peewees, titchies...)

The pcb is quite small and only the ultra miniature caps will fit.

What do you guys recommend?

I don't think so. The OP had not realized the caps on the board are rather standard. Or at least that's how I understand it.

-KM

[amz-fx]

I use this one for certain applications:

Mouser #: 647-USR1C470MDD1TP
Mfr. #: USR1C470MDD1TP
Mfr.: Nichicon

regards, Jack

[Kevin Mitchell]

I can't find an example of the 2013 pcb. But if the 2015 and 2019 boards use the standard sized caps, I'm sure the 2013 one did as well.

I'd be more worried about the TO-220 regulator used on the older boards if "low profile" is the goal. But again, I don't believe that's the intent.
Simple misunderstanding by the poster?

-KM

[antonis]

I don't think so. The OP had not realized the caps on the board are rather standard.

I disagree..

Both https://www.madbeanpedals.com/projects/_folders/BreadBuddies/pdf/RoadRage2019.pdf, page 3 & https://eu.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=33f4e30e17 respective project details call for low profile caps, like this: https://eu.mouser.com/datasheet/2/231/144668958675-933961.pdf

P.S.
PCB shows everything but the height of an item..

[Kevin Mitchell]

Ohhhh. I missed that description.
But does that BOM apply to the 2013 pcb? 

Edit; Found it http://music.codydeschenes.com/wp-content/uploads/2013/09/Road-Rage-Madbean-Transfer.pdf
I'm unsure if there was actually a 2013 board - but instead a 2011, 2012, 2015 and 2019. Could be wrong.

However, I win. 

-KM

[antonis]

But does that BOM apply to the 2013 pcb? 

That should be another thread's query, shouldn't it..??

[mcknib]

I use Forever brand for my micro miniature needs these

https://www.rapidonline.com/forever-5mm-microminiature-electrolytic-capacitors-65940

[davent]

I'm after some ultra miniature 16V electro caps. The caps are for a Mad Bean Road Rage 2013, as shown in the circuit in the link, the value of the caps are 100uF and 10uF. The pcb is quite small and only the ultra miniature caps will fit.

What do you guys recommend?

https://www.madbeanpedals.com/projects/_folders/BreadBuddies/pdf/RoadRage2019.pdf

Regards

Mark

Brian has a build guide for his Baby boards, 1590a enclosures, with parts suggestions and links, pg18 or so.

https://www.madbeanpedals.com/downloads/BabyBoardGuide.pdf
dave

[Mark Abbott]

Thanks for the replies and I should have mentioned the 2013 Road Rage is in the archive section, sorry for that omission.

The width of the 100uF cap is 5mm and distance between the legs is 3mm, the 10uF caps I bought years ago (and I can't order from the same vendor) are under 6mm high, 4mm diameter and the distance between the radial legs is 2.5mm.



Thanks again for your time and assistance.

Regards

Mark

[bean]

These are the low profile caps I use:

1uF: https://www.mouser.com/ProductDetail/140-SG1R0M1H0407P
2u2: https://www.mouser.com/ProductDetail/647-UMW1H2R2MDD1TP
4u7: https://www.mouser.com/ProductDetail/647-UMW1E4R7MDD
10uF: https://www.mouser.com/ProductDetail/140-SS100M1E0505P
22uF: https://www.mouser.com/ProductDetail/667-EEA-GA1E220
47uF: https://www.mouser.com/ProductDetail/140-SS470M1E0605P
100uF: https://www.mouser.com/ProductDetail/140-SS101M1E0805P

Some are 5mm high and some 7mm. 5mm is preferable for 1590A enclosures, IMO.

[FiveseveN]

the 10uF caps I bought years ago (and I can't order from the same vendor) are under 6mm high

I figured the regular 11 mm height would fit as an IC in a socket is already about 10 mm tall. That baby board build guide (say that 3 times fast!) even shows a big ol' metal can IC, so is there a reason why they should be much shorter than the tallest thing on the board?

[Rob Strand]

Has anyone checked this thing still works OK with those caps.   
Generic low frequency caps  + small size + only 10uF all add-up to high ESR and poor performance (poor regulation/low current capability).

Look at section 8.2.2.2,

https://www.ti.com/lit/ds/symlink/lt1054.pdf

[duck_arse]

strewth cobber. have a look here, maybe.

https://www.rockby.com.au/searchresSql_12.cfm?select=07&subcode=488

[bean]

Has anyone checked this thing still works OK with those caps.   
Generic low frequency caps  + small size + only 10uF all add-up to high ESR and poor performance (poor regulation/low current capability).

Look at section 8.2.2.2,

https://www.ti.com/lit/ds/symlink/lt1054.pdf

Based on my experience the low ESR caps are preferable but in most cases the charge pump circuit works well enough without them. I feel confident about that b/c I've built lots and lots of bi-polar supply circuits and 18v/15v regulated circuits with the low profile caps. With higher current demands it could become a concern, I guess.

[Rob Strand]

I feel confident about that b/c I've built lots and lots of bi-polar supply circuits and 18v/15v regulated circuits with the low profile caps. With higher current demands it could become a concern, I guess.

Sure.  I suppose its more a matter of what currents people expect to get out of the module.   They might not realize they could get a bit more out of it by using larger cap values and/or low ESR caps.  Maybe a bit less ripple as well.

[bean]

I feel confident about that b/c I've built lots and lots of bi-polar supply circuits and 18v/15v regulated circuits with the low profile caps. With higher current demands it could become a concern, I guess.

Sure.  I suppose its more a matter of what currents people expect to get out of the module.   They might not realize they could get a bit more out of it by using larger cap values and/or low ESR caps.  Maybe a bit less ripple as well.

Definitely. In the case of the RoadRage itself, it's designed for a more narrow set of applications: negative voltage for +ground effect (which are already have low current demands) or stepped up voltage for effects built in tight spaces like overdrives, etc.

Actually, there are low ESR low-profile caps out there. I know Peter used them in his VFE line but the specific part was either obsoleted or just not available the last time I looked.