Project files: The ManyCaps PSUs…

What is it?
A little sideline project one might say :). For one of my other (upcoming) projects I needed to buy quite a few Panasonic FM series capacitors in one specific value. As is sometimes the case, buying 100 wasn’t much more expensive than just buying the 35 I needed and so I ended up with a question: What can you do with the rest?

In theory, paralleling multiple small capacitors gives you lower ESR/ESL and higher ripple current than a single big cap. However, due to the physical distance required between the many small caps some of the benefit is negated and overall I am not sure I dare say that one approach is inherently better than the other – that depends on what you are trying to achieve I think.

However, as I already had the capacitors I might as well try it. Obviously, something as groundbreaking as this needs to have a suitably audiophile-sounding name, so without further ado allow me to introduce the “ManyCaps”(™) audiophile PSU boards 😀

There are two versions, single and dual, with space for either 2×12 or 1×15 13mm radial capacitors. The most obvious application for these is probably gainclones and smaller class D amplifiers but they can be used anywhere where an unregulated supply is OK. The boards can of course also be used with a DC input, either with the rectifier in place or with the rectifier bypassed.

How big are the boards?
The single board measures 3.8″ x 2.0″ (app. 97 x 51 mm) and the dual board measures 3.925″ x 3.2″ (app. 100 x 81 mm).

What is the status of the boards?
Both boards are in v. 1.0. They are simple designs, so I didn’t need to make any changes and they worked the first time round 🙂

Does it use any special/expensive/hard-to-find parts?
Nothing really stands out:
  • The main capacitors are 13mm max diameter and voltage obviously depends on the application.
  • Rectifier is GBU-type and should probably be rated at least 6-8A.
  • The decoupling capacitor should be around 1.0 uF MKP or MKT. The lead spacing is 22.5mm on the dual board and 15mm on the single board.

Anything else I need to know?
Can’t think of anything 🙂

Downloads:
Download design files here

Related information:
Note: Always read the “intro post” for additional important information about my designs.

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One Response to Project files: The ManyCaps PSUs…

  1. Pingback: Use and misuse… | theslowdiyer

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