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Old 02-28-2011, 03:04 PM #1
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Default lm317 for 445 question

So basically i was wondering..... I recently i figured out a resistor must be able to withstand 1W of power. Also i realised my 1n4001 diode only withstands 1w and i plan on using a 1 ohm resistor giving a 1.25A max current. Would it be better to use the 1n4001 or to not use it at all.


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Old 02-28-2011, 03:33 PM #2
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Default Re: lm317 for 445 question

If it's for the protection diode, then I think it's better than nothing. My understanding is that it may hold up for a few seconds or so - perhaps long enough for you to realize you've wired the circuit / your battery wrong, and disconnect power (which might be long enough to safe your diode)

Could be wrong on this - just my gut.
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Old 02-28-2011, 04:42 PM #3
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Default Re: lm317 for 445 question

Oh alright. So also for the resistor part, i believe i should get at least one with 2W
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Old 02-28-2011, 04:49 PM #4
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Default Re: lm317 for 445 question

yep, or parallel 2x 1w resistors with double the ohms each
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