5v DC

Super Cameraman · Post by **Super Cameraman** » Mon Oct 15, 2007 3:20 pm

I'm trying to power a microphone. According to someone at some site I found on Google:

The small plug is a 2.5mm sub-mini phone and the tip carries 5 VDC to power the mic

I'm going to assume that he means 5v DC? Direct Current?

Are there any batteries that produce a 5v DC current? Or a combination of a few batteries?

Post by **Skyone** » Mon Oct 15, 2007 4:00 pm

Regardless, you don't power microphones - they're just like speakers. Unless they have an amp, they're only magnets.

Super Cameraman · Post by **Super Cameraman** » Mon Oct 15, 2007 4:11 pm

Shotgun mics need power.

Did I mention I don't know anything?

What is that/where do I get one?

EDIT: *Slaps forehead*

I get it. So I plug a battery that has more then 5v into it and it outputs what I need?

Okay, what kind of battery should I plug in?

Post by **CronoTriggerfan** » Mon Oct 15, 2007 4:20 pm

Or you could just use 4 standard AAs.

CTFan

Post by **Skyone** » Mon Oct 15, 2007 4:31 pm

CronoTriggerfan wrote:Or you could just use 4 standard AAs.

CTFan

And risk over charge and asplosion.

It's a 7805 5v regulator, and I'm not sure how you've made it this far without knowing what it is.

Super Cameraman · Post by **Super Cameraman** » Mon Oct 15, 2007 5:34 pm

Honestly, I really have no idea what I'm even doing here. I have a little experience with electronics and I have one failed NESp under my belt, but that's about it. That and some random hacks like that VR thing I made and that Guitar Hero controller. (Which isn't finished)

But anyway, if I get a 7805 voltage regulator and 4 AAs I'll be okay?

Post by **CronoTriggerfan** » Mon Oct 15, 2007 6:16 pm

Skyone wrote:And risk over charge and asplosion.

It's a 7805 5v regulator, and I'm not sure how you've made it this far without knowing what it is.

Do you really think the voltage difference is that high?

Regardless, wiring up any DC power source above 5v and running it through a 7805 will give you 5v out, provided it's wired correctly (which is ridiculously difficult to screw up). So yes, 4AA batts = 6V, ran through a 7805 = 5V. And like Sky said, how can you have over 700 posts here and not know this?

CTFan

Post by **Skyone** » Mon Oct 15, 2007 6:22 pm

Lowest input voltage for 7805 is 7.2v, give or take a half a volt. Using only 6v from AA will result in drop-out. Either find a different regulator or use 5 batteries.

Super Cameraman · Post by **Super Cameraman** » Mon Oct 15, 2007 6:34 pm

Lucky for me, I have 3 7.2v RC car batteries laying around!

So, RC car battery + 7805 = Good?

Post by **Skyone** » Mon Oct 15, 2007 6:42 pm

Yep, should work fine.

Super Cameraman · Post by **Super Cameraman** » Mon Oct 15, 2007 6:53 pm

Sweet, thanks for the help.

Super Cameraman · Post by **Super Cameraman** » Thu Oct 18, 2007 12:34 pm

Well I got the 7805 hooked up to a 9v battery, and it works like a charm! Thanks again!

Super Mulletman · Post by **Super Mulletman** » Mon Oct 29, 2007 6:00 am

You should be able to just use 4 AAs if you get a hold of a low-input regulator. I don't remember the name of it, but you get one from digi-key that has a 6v minimum input requirement.

Bibin · Post by **Bibin** » Mon Oct 29, 2007 2:09 pm

Actually, microphone ports on computers and laptops and such do carry electricity. A mono microphone has three wires: one's data, one's ground, one's 5VDC. I tested it with a voltometer.