Pages: [1]   Go Down
Author Topic: 12 V Regulator  (Read 635 times)
0 Members and 1 Guest are viewing this topic.
0
Offline Offline
Newbie
*
Karma: 0
Posts: 31
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi. I'm using a 12 V regulator to power some computer fans. Is it necessary to use capacitors with the regulator or will it be fine without them. Thanks.
Logged

Austin, TX
Offline Offline
Faraday Member
**
Karma: 64
Posts: 6055
Baldengineer
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

In general, you should use what the datasheet says.

If a (relatively) constant load like a fan is present, they are probably not necessary.
Logged

Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

Manchester (England England)
Online Online
Brattain Member
*****
Karma: 513
Posts: 31529
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
If a (relatively) constant load like a fan is present, they are probably not necessary.
Yes they are.
Anyway a fan is inductive and noisy so you defiantly need them with a fan.

There has been a flurry of these posts recently, I don't know what caused it but if any professional electronic engineer insisted in not putting caps on regulators he would be sacked, and quite rightly. 
Logged

0
Offline Offline
Newbie
*
Karma: 0
Posts: 31
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Thanks. The data sheet says nothing about capacitors. What amount should I use?
Logged

Manchester (England England)
Online Online
Brattain Member
*****
Karma: 513
Posts: 31529
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

I doubt that can you link the data sheet?
Logged

0
Offline Offline
Newbie
*
Karma: 0
Posts: 31
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Here is the data sheet.
http://www.nteinc.com/specs/900to999/pdf/nte966.pdf
Logged

Manchester (England England)
Online Online
Brattain Member
*****
Karma: 513
Posts: 31529
Solder is electric glue
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Page 2 second paragraph. They say 0.33uF, and all the example circuits have 0.1uF on in and out.
Logged

0
Offline Offline
Newbie
*
Karma: 0
Posts: 31
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Thank you so much.
Logged

Western New York, USA
Offline Offline
Faraday Member
**
Karma: 26
Posts: 4117
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
There has been a flurry of these posts recently, I don't know what caused it ...

It's a conspiracy to rile you up.  They switch back and forth between voltage regulator capacitors, bypass capacitors on ICs, and the capacitor on the shift register clock line.

Don
Logged

Pages: [1]   Go Up
Jump to: