Lil help for the noob?

wetwire · 11-03-2011, 10:01 AM

Grrreeaat!

So measured all the resistors and the 470Ω were all correct and the 470kΩ all measured lower. Between 220k-355kΩ . Now I did some reading about testing resistors and it made things clear as mud. I came to the conclusion that you cant really measure some resistors with a single, standard MM. I tried using even my nice Fluke and same results. Rock, I noticed you mentioned a range resistor somewhere. Is that possible. These look just like a regular resistor. The color code is for 470kΩ. I think I just do not have the correct tools to accurately test the resistor but would like to verify.

Rocketman · 11-03-2011, 10:16 AM

The range resistor comment was in a post about setting a fixed voltage range on an OK-R switching regulator. Are you holding the resistor when you measure it? or using alligator clips?
I would expect 470Kohms to be within 10% (5% for the resistor tolerance and up to 5% for the meter) on the 2000 Kohm range.

JohnnyJames · 11-03-2011, 11:35 AM

I'd worry more about having one of these more than I would about the caps.

http://www.radioshack.com/product/in...ductId=2102856

You could put the reg on it or in it. A dab of heat sink grease also helps.

RY4 · 11-03-2011, 11:48 AM

Quote:

Originally Posted by wetwire

Starred at em for like.. ever... woooahh getting dizzy

Ticket sent in to MV.. One of you brains has got to know.. ICU

LMAO!

Quote:

Originally Posted by Kali

You should definitely send them a message and tell them about any problems that you have. I never get anything free in my shipments either, but I ordered an epower DCC from them and it was DOA. they gave me points as a refund.

I had many issues with DOA cartos. I should have called but just started ordering those elsewhere. Did teach me to start checking cartos before filling though.

wetwire · 11-03-2011, 05:39 PM

Quote:

Originally Posted by Rocketman

The range resistor comment was in a post about setting a fixed voltage range on an OK-R switching regulator. Are you holding the resistor when you measure it? or using alligator clips?
I would expect 470Kohms to be within 10% (5% for the resistor tolerance and up to 5% for the meter) on the 2000 Kohm range.

Clips.. maybe should ohm them

That was the setting for the 470k btw.. Maybe dying mm battery? Gonna check them with another meter.

wetwire · 11-04-2011, 12:35 PM

FWIW if anyone is interested, I recieved this from MV

Quote:

Date: 2011-11-04 13:11:27
Name: Phu

Message:

Hi David,
The resistor is to protect the control pin of the chip which is the 378R05 chip. This chip has 4 pins, Vin, Vout, Ground, and Control. If you buy a different chip other than the one we have for our 5v box mod or 5v auto box mod, then it is no necessary for the resistors. Other then what you want to do with your chip.

Thank you for choosing MadVapes

Phu
MOD guy
MadVapes.com

I was expecting an answer like that. I guess if you read between the lines?? So i got a freebie after all.. woot!

Rechecked my MV resistors again. Popped in a new battery and viola.. They are spot on. My bad