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Topic: Can I connect input pins directly to +5V? (Read 2 times) previous topic - next topic

RIDDICK

#15
Jul 05, 2012, 04:52 pm Last Edit: Jul 05, 2012, 04:54 pm by RIDDICK Reason: 1
OVER LOAD ALERT   :smiley-red:

if u drive 16 1kOhm resistors from 1 arduino pin, u will get 80mA, which is too much for a single pin...
so u should use 3kOhm resistors...
or a mosfet as a driver (the arduino pin goes to the gate)...
or a bjt...

oops
-Arne

yesyes

Thanks for that. I'll use 16x 4k7 then, that adds up to 17mA.
Chris

Location: Berkshire, UK
My Astro and DIY projects website: http://yesyes.info/

RIDDICK

-Arne

yesyes

I've managed to solder this on a rather small footprint last night.. ;-)
Not tested yet, will report back how it works.

Thanks again for all your help! Much appreciated. :)
Chris

Location: Berkshire, UK
My Astro and DIY projects website: http://yesyes.info/

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