3.3v regulator

Post by **Sparkfist** » Fri Nov 26, 2004 3:48 pm

Now I hope I'm not the first to rip up the power supply.

I found 3 power regulators, of them does anyone have an idea of what regulator drops the power down to 3.3v or a way to find out what the voltage output is?

Thank you for any help.

Post by **Sparkfist** » Fri Nov 26, 2004 5:56 pm

Well this is almost suprising.

Anyways I think I might have the regulator, had to trace the leads. Does anyone know what kind of curcuit I can make to test the out put or how I can setup a volt-meter to check the output?

JackFrost22 · Post by **JackFrost22** » Fri Nov 26, 2004 8:44 pm

the input pin is the left grd the center and output the right i actually cracked open mine and found one never used it though

Post by **Sparkfist** » Fri Nov 26, 2004 8:56 pm

As I have a lot to catch up on, and no school tomarrow I'll look into talking to my dad about making a test circuit to see which of the three is the one I need. I'll tell you what the numbers are or where on the board it is, so if anyone else whats to canablise the power supply they can.

HK-47 · Post by **HK-47** » Fri Nov 26, 2004 8:58 pm

If you post some pics ill help you as much as I can. Besides that I have no idea what you are working with.

Post by **Sparkfist** » Fri Nov 26, 2004 9:04 pm

Try a mental image.
There are three power regulators in the power supply for the N64, one is next to a diode and two are towards the back center. I'm looking at one form the back center and hoping that bacause is leads to the 3.3v ouput (if I'm not mistaken) I can use it. I know its a power regulator as they all look like 78xx.

I hate going into uncharted terroitory.

HK-47 · Post by **HK-47** » Fri Nov 26, 2004 9:05 pm

Could you at least do something in paint? You can host it with www.tinypic.com .

Post by **gannon** » Fri Nov 26, 2004 9:06 pm

you know, just because they look like a 78xx doesn't mean that they are, they could also be triacs or transistors.

Post by **Sparkfist** » Fri Nov 26, 2004 9:18 pm

You asked for something, I just put in some detail. The things labled 1, 2 and 3 are the power regulators, from the leads at the power output I found that #3 seems to be the one, but as I stupidly desoldered them and mixed 2 and 3 up I have to test both to be sure.

Silver thing is a fuse, the other brown things are the copper coil things (chokes or transformers) and the black and yellow cirlces are capasiters.

someone · Post by **someone** » Sat Nov 27, 2004 1:14 am

gannon wrote:you know, just because they look like a 78xx doesn't mean that they are, they could also be triacs or transistors.

yeah thats very true. there are a lot of transistors that look like (or are made in) the TO-220 form factor (the one that 78XXs usually use).

JackFrost22 · Post by **JackFrost22** » Sat Nov 27, 2004 11:26 am

would it hurt testing them? I found it by chance. but ended up using one from a dc power supply board.