When I started with Arduino I bought a set of 600 resistors (30 times 20 values). However, I found out 120 ohm needed for CAN bus is not among them.
So I need to buy 120 ohm resistors (I don't want to combine multiple). However, I was wondering how many watts they should handle.
I want to connect two or later maybe three devices, all running on USB power (5V). But I cannot find how many (m)A CAN is using.
V = I * R <=> 5 = I * 120 <=> I = 5 / 120 = 41,7 mA
P = I * V = 0,041666 * 5 = 0.208W
P = I^2 * R = 0.041666 0.208W
So I would be safe with default (0.25W) 120 ohm resistors?