Basic Resistor Training

HK-47 · Post by **HK-47** » Sun Mar 27, 2005 9:03 pm

Yes a 7805 would be appropiate in this place. Some pics of the power supply would help. Though if you said you only need 12v and 5v, you can just hook it up like this:

It wont melt if you get one that can handle high draw and use a heatsink.

this-is-me · Post by **this-is-me** » Sun Mar 27, 2005 9:05 pm

Look back a page, I posted pics of the power supply. However, I believe that you have provided all the info I needed. Thanks a lot.

Post by **SpongeBuell** » Sun Mar 27, 2005 9:08 pm

this-is-me wrote:Since I can't edit my own post anymore (thanks a lot ben)

he has allowed people to edit again before you started this thread, actually

this-is-me · Post by **this-is-me** » Sun Mar 27, 2005 9:09 pm

Why don't I see the edit button then?

Post by **SpongeBuell** » Sun Mar 27, 2005 9:15 pm

good point

he said he did, and it was back at one point. I think that he's playing with the settings right now. JackFrost22 is having problems with the [img] tags. I hope the board isn't being hacked.

JackFrost22 · Post by **JackFrost22** » Sun Mar 27, 2005 9:20 pm

Oh No the boards being hacked
Oh no
OH NO!!!!!!
Picture of the kool aid man that wont work
OH YEAH!

HK-47 · Post by **HK-47** » Sun Mar 27, 2005 9:24 pm

Jack, kill the slash at the end of the url in your sig and it'll work.

vb_master · Post by **vb_master** » Sun Mar 27, 2005 9:24 pm

I use this to calculate values.

Oh, and JackFrost22, no spamming.

vb_master · Post by **vb_master** » Sun Mar 27, 2005 9:25 pm

Grrr, no edit. HK-47, you can edit his profile, so you can fix that. I don't think you'd like the symbol, though.

HK-47 · Post by **HK-47** » Sun Mar 27, 2005 9:26 pm

I dont like the pic, and unless Im missing some feature, I cant edit profiles. Only admins can.

JackFrost22 · Post by **JackFrost22** » Sun Mar 27, 2005 9:27 pm

it was just a little joke vb ease up

this-is-me · Post by **this-is-me** » Sun Mar 27, 2005 9:49 pm

Thanks a lot for everyone's help. I will try it!

this-is-me · Post by **this-is-me** » Sun Mar 27, 2005 11:55 pm

I have one other question. Does it matter what is used for a heatsink on the 7805? Can I use some sliced up aluminum? Would copper do better? How much "surface area" does the heatsink have to have to be effective? This may not be the best question to ask because individual experiences may differ, but what have you guys used to cool one?

HK-47 · Post by **HK-47** » Mon Mar 28, 2005 10:19 am

This one is good:
Heatsink

this-is-me · Post by **this-is-me** » Mon Mar 28, 2005 2:26 pm

The problem is that I cannot afford to wait on this one. Will a hand-made heatsink work just as well?