What is that yellow component ?

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

What is that yellow component ?

Postby FausterCraster » 27 Feb 2017, 23:29

Hi,
into the PCB is rated 300mA it is just before the 7809 regulator.
This is the link to the project :

http://www.aresaudio.com/stomps-power-supply.html
FausterCraster
 
Posts: 31
Joined: 27 Sep 2016, 06:52
Has thanked: 17 times
Have thanks: 14 times

Re: What is that yellow component ?

Postby Intripped » 27 Feb 2017, 23:53

Self-restoring fuse

For this message the author Intripped has received thanks:
FausterCraster (18 Mar 2017, 22:52)
Intripped
Cap Cooler
 
Posts: 487
Joined: 25 Aug 2009, 02:03
Has thanked: 577 times
Have thanks: 214 times

Re: What is that yellow component ?

Postby phatt » 28 Feb 2017, 04:33

From here; https://en.wikipedia.org/wiki/Resettable_fuse
A polymeric positive temperature coefficient device (PPTC, commonly known as a resettable fuse, polyfuse or polyswitch)
Brilliant little device,, also used for speaker protection. :thumbsup
Phil.

For this message the author phatt has received thanks:
FausterCraster (18 Mar 2017, 22:53)
phatt
Transistor Tuner
 
Posts: 1033
Joined: 04 Aug 2010, 06:17
Location: Morayfield SE Qld AU
Has thanked: 0 time
Have thanks: 259 times

Re: What is that yellow component ?

Postby plush » 28 Feb 2017, 11:40

Offtop: is it just me or this psu is actually not isolated but a simple regulated daisy chain?
User avatar
plush
Breadboard Brother
 
Posts: 129
Joined: 08 Dec 2015, 10:29
Has thanked: 21 times
Have thanks: 28 times

Re: What is that yellow component ?

Postby deltafred » 28 Feb 2017, 15:56

It looks to me like a switched mode power supply with a separate winding, rectifier, smoothing cap and 3 terminal regulator and polyfuse for each output making it isolated outputs. I could be wrong of course.
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: 1441
Joined: 06 Apr 2010, 17:16
Location: Yorkshire, England, UK
Has thanked: 377 times
Have thanks: 258 times


Return to DIY Stompbox designs

Who is online

Users browsing this forum: No registered users and 2 guests