go away spammer

Author Topic: 5V Linear Regulator  (Read 4086 times)

0 Members and 1 Guest are viewing this topic.

Offline Private ReidTopic starter

  • Robot Overlord
  • ****
  • Posts: 272
  • Helpful? 0
  • I love apples ... Yum !!!
5V Linear Regulator
« on: June 20, 2008, 08:00:41 PM »
Enerywhere i go to buy a regulator, the person serving me askes if i would like it to be a negative or positive regulator?!

is there a difference?

which one should i buy?

5v negitive

5v positive
Logged

Offline ALZ

  • Full Member
  • ***
  • Posts: 75
  • Helpful? 1
Re: 5V Linear Regulator
« Reply #1 on: June 21, 2008, 12:46:01 AM »
Hi Private Reid:  Yes there is a difference. Not to be a smart ass but I don't know what you are builting so I don't which one you need. What it means is if your ground is negative and the other power rail is positive then that's a  positive  regulator. If your ground is  positive and the other power rail negative then it's negative regulator.
Logged

Offline Afroman

  • Expert Roboticist
  • Full Member
  • *****
  • Posts: 50
  • Helpful? 4
    • Oscilloscope tutorial video
Re: 5V Linear Regulator
« Reply #2 on: June 21, 2008, 12:27:28 PM »
The vast majority of the time you want a positive 5V regulator.
For example, going from a 9.6V battery pack down to 5V to power a microcontroller will require a positive 5V regulator, such as the classic LM7805.

Negative regulators are generally only used for creating regulated negative rails for use with certain amplifier circuits.
Logged
 

Get Your Ad Here