137Views18Replies

Author Options:

in where do I find and how do I tell if it is a 5v regulator? Answered

Picture of

I need to find a five v regulator(7805) for a portable 9v battery charger and i cant go out and buy one. can someone tell me in what device i can find a resistor(specifically 5v).  And i need to know how to tell if it is a 5V Regulator. heres one i found.. does it look like a 5v?
                                                                                                                              


                                                                                                                                       thanks,
                                                                                                                             The DoctorOfAwesome

18 Replies

user
Dread_Neck (author)2010-11-15

UPDATE! UPDATE! I bought the stuff at radio shack and a switch. now all i need is a soldering iron....

Select as Best AnswerUndo Best Answer

user
kelseymh (author)2010-11-08

"I can't go out and buy one." Um. At 45 cents (US) a pop, they're about half the price of a candy bar.

Select as Best AnswerUndo Best Answer

user
ljarrald (author)2010-11-07

is that a hp g70 laptop?/Compaq alternative

Select as Best AnswerUndo Best Answer

user
ljarrald (author)Dread_Neck2010-11-08

haha. i have this laptop. biggest waste of money ever. this is how it's ended up: hope to re design the lid out of perspex soon. will make an instructable

Select as Best AnswerUndo Best Answer

user
Dread_Neck (author)ljarrald2010-11-08

its my sisters. what the heck did you do?

Select as Best AnswerUndo Best Answer

user
ljarrald (author)Dread_Neck2010-11-08

the plastics around the back of the screen that also holds the hinges was poorly made and the bits that the hinges screw into competeley snapped off. cheepest replacement was £80. forget that. im usin wood!

Select as Best AnswerUndo Best Answer

user
Dread_Neck (author)lemonie2010-11-07

Yep. the........altoids one.

Select as Best AnswerUndo Best Answer

user
kelseymh (author)2010-11-06

Edit your text and the title to correct it to what you've just figured out. Then look carefully at it to see if you can make out a part number -- they're usually printed in white on the black body of the piece. That's the number you want to put into a Google search to get the specs (for maximum current).

You'll be able to buy a replacement at RadioShack or any local electronics hobby shop, or online from places like Jameco, Digikey, etc.

Select as Best AnswerUndo Best Answer

user
Dread_Neck (author)kelseymh2010-11-07

7805. i know it from memory

Select as Best AnswerUndo Best Answer

user
NachoMahma (author)kelseymh2010-11-07

.  If you are looking for a 5V regulator, then look for "7805" or "7905" in the part number. There may be a letter between 78/79 and 05, eg, LM78M05. Should be able to salvage them from most computers and peripherals.

Select as Best AnswerUndo Best Answer

user
Tool Using Animal (author)2010-11-06
user

I know someone who got one from a PS 1. I don't have one but i have some old cell phones and electronics.

Select as Best AnswerUndo Best Answer

user

What I'm saying is, resistors are measured in Ohms, not Volts.

Select as Best AnswerUndo Best Answer

user

Well, im making something for my mp3 player. OOOOOOOOOOOOHHHHHHH Its a regulator!!!!! I still need help identifying a 5V REGULATOR and were to find one. Could i get it in an old PS 1.

Select as Best AnswerUndo Best Answer

user
kelseymh (author)Dread_Neck2010-11-06

Whoever told you that was either mocking you or had no idea what they were talking about. Resistors are measured in ohms (the SI unit of resistance), they also have ratings in watts (the SI unit of power), which specifies the maximum power (product of voltage and current) you can put through them.

Perhaps you're thinking of a capacitor? They are measured in units of farads (typically micro- or picofarads), and also have a voltage rating, indicating the maximum voltage they can sustain when fully charged.

Select as Best AnswerUndo Best Answer

user
Dread_Neck (author)kelseymh2010-11-06

Well, im making something for my mp3 player. OOOOOOOOOOOOHHHHHHH Its a regulator!!!!! I still need help identifying a 5V REGULATOR and were to find one. Could i get it in an old PS 1.

Select as Best AnswerUndo Best Answer