[TriEmbed] Pull-up & Pull-down resistors

Terry King terry at terryking.us
Fri Oct 31 07:42:11 CDT 2014


Hi Brian,

This is a classic case of "Resistor value not critical"...

The inputs on Arduino etc. are very high impedance so actually anything like 100K or less is OK..

I buy 10k, 5000 at a time and put 10 each 10K and 220 (Good LED current limiting value) in the
kits I make for schools etc:

http://yourduino.com/sunshop2/index.php?l=product_detail&p=395

DISCLAIMER: Mentioned stuff from my own shop...!!

Regards, Terry King
...In the Woods in Vermont USA
terry at terryking.us

-The One who Dies with the most Parts LOSES. What do you need??

---------------------( COPY )---------------------

I've seen 1k, 3.3k, 10k all as acceptable values for pull-down resistors with Raspberry Pi &
Arduino-type devices.
How do you pick the proper one since this doesn't seem to be an Ohm's Law problem?


Brian Grawburg






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