RogerTango
New Member
As my sig line suggest, Im a n00b...
Ive got a 3w LED that I want to drive with an LM317 in current regulation mode. I need 800ma to drive the LED per the specs I received.
Running the requirements though the calculations, I came up with needing a 1.6 ohm resistor with 1w of power handling.
Now, where the HECK do I get that??
Im in the US, and my most local source of parts is Radio Shack. I dont see where they have any 1.5ohm resistors (refer to sig line again, ha)
I am still trying to understand resistors in series and parallel. Can someone take the time to help me learn and calculate, based on the availability of what is at the Radio Shack website, what resistors I need, how to wire them and why, so I can calculate this for myself (and possibly help someone else) in the future?
Many thanks-
"Lost and Confused" Andrew
Ive got a 3w LED that I want to drive with an LM317 in current regulation mode. I need 800ma to drive the LED per the specs I received.
Running the requirements though the calculations, I came up with needing a 1.6 ohm resistor with 1w of power handling.
Now, where the HECK do I get that??
Im in the US, and my most local source of parts is Radio Shack. I dont see where they have any 1.5ohm resistors (refer to sig line again, ha)
I am still trying to understand resistors in series and parallel. Can someone take the time to help me learn and calculate, based on the availability of what is at the Radio Shack website, what resistors I need, how to wire them and why, so I can calculate this for myself (and possibly help someone else) in the future?
Many thanks-
"Lost and Confused" Andrew
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