7812 vs 7912

KU40 · 11th June 2006, 06:00 PM

I am repairing an amplifier and I think a 7912 regulator is bad. What's the difference between the 78 and 79? Radio shack apparently only carries the 7812 so if I have to use a 7912 I suppose I'll have to order it from somewhere else.

Tekko · 11th June 2006, 06:02 PM

7812 = positive bus voltage regulator.
7912 = negative bus voltage regulator.

latala · 11th June 2006, 10:44 PM

please alsop note that the pin connections are also different
regards trev

AndrewT · 12th June 2006, 08:51 PM

Hi,
down load the datasheets for each.
Lots of useful guidance and circuits as well as the techy jargon.

Leolabs · 13th June 2006, 03:30 PM

From:Fairchild,NS,TI,ST.......................any of them.

11th June 2006, 06:00 PM	#1
KU40 diyAudio Member Join Date: Jun 2006	7812 vs 7912 I am repairing an amplifier and I think a 7912 regulator is bad. What's the difference between the 78 and 79? Radio shack apparently only carries the 7812 so if I have to use a 7912 I suppose I'll have to order it from somewhere else.

11th June 2006, 06:02 PM	#2
Tekko diyAudio Member Join Date: Jan 2005	7812 = positive bus voltage regulator. 7912 = negative bus voltage regulator. __________________ The point of life is to build atleast one audio amplifier before you die.

12th June 2006, 08:51 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, down load the datasheets for each. Lots of useful guidance and circuits as well as the techy jargon. __________________ regards Andrew T.

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11th June 2006, 10:44 PM	#3
latala diyAudio Member Join Date: Feb 2006 Location: staffordshire	please alsop note that the pin connections are also different regards trev

13th June 2006, 03:30 PM	#5
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	From:Fairchild,NS,TI,ST.......................any of them.

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