need resistors

[bcroft]

Does anyone know where i can find a 3 Ohm or 7 Ohm resistor? if anyone has one or two would you be interested in selling?

 

[supernova]

Hi

http://search.digikey.com/scripts/DkSearch/dksus.dll?KeywordSearch

SN

 

[yobresal]

I have 4.7ohm resistors. Lots of them

 

[Gazoo]

Does anyone know where i can find a 3 Ohm or 7 Ohm resistor? if anyone has one or two would you be interested in selling?

I found these:

http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=003-3

 

[jayrob]

Here's some 1/2 watt ones that work just fine for 420mA's,
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=3.0H-ND
but, might as well get the 1 watt ones that Gazoo found there...
Jay

 

[bcroft]

1 watt is better than 1/2?

 

[SargeMX5]

1/2watt is enough, 1 watt and the resistor is bigger. depending on the current, you may be able to get away with 1/4 watt

 

[Gazoo]

1/2watt is enough, 1 watt and the resistor is bigger. depending on the current, you may be able to get away with 1/4 watt

If using a 3 ohm resistor with the LM317, the current going to the diode will be 416ma's. This means you need a .52 watt resistor. Granted you could use a 1/2 watt resistor, but I like to follow ohms law and do what ohms law is telling me to do.

You can get away with a 1/4 watt resistor if you drive the diode with 200ma's or less. The calculations are very simple when working with the 317.

 

[bcroft]

cool, ill order that flame proof one you linked gazoo,  I appreciate it everyone, thanks!