Power supply design

Stompboxes circuits published in magazines, books or on DIY electronics websites.

Power supply design

Postby FausterCraster » 26 Mar 2017, 18:39

Hi,
how to design a really low noise power supply ?
I built a lot of stuff but these never satisfy me too much...
FausterCraster
 
Posts: 16
Joined: 27 Sep 2016, 06:52
Has thanked: 7 times
Have thanks: 2 times

Re: Power supply design

Postby FausterCraster » 26 Mar 2017, 20:06

FausterCraster
 
Posts: 16
Joined: 27 Sep 2016, 06:52
Has thanked: 7 times
Have thanks: 2 times

Re: Power supply design

Postby phatt » 27 Mar 2017, 12:17

I see a lot of players with so many pedals each with insane amounts of gain so likely no psu on the planet will fix that problem. :roll:
If you build intelligent circuitry you won't need fancy PSU. :secret:
I big issue is that a lot of PSU's are now Switchmode and many are just horrible noise makers.
Phil.
phatt
Diode Debunker
 
Posts: 914
Joined: 04 Aug 2010, 06:17
Location: Morayfield SE Qld AU
Has thanked: 0 time
Have thanks: 228 times

Re: Power supply design

Postby deltafred » 27 Mar 2017, 12:54

phatt wrote:If you build intelligent circuitry you won't need fancy PSU. :secret:


This ^

Pedals designed for battery operation do not always have sufficient power rail smoothing to perform well on (some) power supplies. With battery operation this isn't a problem.

Some pedals "designed" for PSU operation don't perform well because the "designer" is clueless about good circuit design practice. These pedals are best avoided.

This can be made worse if there are other pedals that generate noise (those with digital circuitry can do this) and allow it to be superimposed upon the supply rails. This noise is just amplified by the pedal/s that have poor power supply noise rejection.
Politics is the art of so plucking the goose as to obtain the most feathers with the least squawking. - R.G. 2011
Jeez, she's an ugly bastard, she makes my socks hurt. I hope it's no ones missus here. - Ice-9 2012
User avatar
deltafred
Opamp Operator
 
Posts: 1345
Joined: 06 Apr 2010, 17:16
Location: Yorkshire, England, UK
Has thanked: 273 times
Have thanks: 227 times


Return to DIY Stompbox designs

Who is online

Users browsing this forum: No registered users and 6 guests