# Resistor wattage for HDMI hack

I need to add a 1K ohm resistor to a HDMI connector to solve some EDID HDMI issues.

Here is the image of the person who already did that.

My quesion is: Considering that voltage of pins to connect to resistor is 5V and amperage is (perhaps) 50mA; resistor 1k ohm of what wattage should I purchase? 1/4W, 1/2W, ... ?

Thank you.

EDIT:

I don't know why they suggest to shortcut those pins in that article...

If I will use 1000ohm; with 5V voltage => 5mA will flow through resistor? The power will be 0.025W.

If I will use 1/4W resistor, it will not overheat, right? 1/4W is max value of that specific resistor to work with NO overheat?

article

You can't get 10mA at 5VDC through a 1k resistor. You can get max of 5mA (5V / 1000ohm = 0.005A) Power is I^2 * R: 0.005 * 0.005 * 1000 = 0.025W

You need a minimum of 1/40 of a watt.

Commenters are correct, I meant minimum, not maximum, but I'm fuzzyheaded sometimes :) Thank you Commenters!

• I'm happy to upvote if you mention 'resistor with minimum power rating of 1/40 Watt' or similar. Apr 10 '15 at 19:19
• @R Drast: That should be minimum 1/40 watt - higher power rating is fine. Apr 10 '15 at 19:28
• I don't know why they suggest to shortcut those pins in that article... If I will use 1000ohm; with 5V voltage => 5mA will flow through resistor? The power will be 0.025W. If I will use 1/4W resistor, it will not overheat, right? 1/4W is max value of that specific resistor to work with NO overheat? Apr 10 '15 at 19:37

P = IV. P is power on watts. Get that wattage or higher resistor.

• I think you mean P=I^2R, or P=E^2/R. P=VR would mean he needs a 5000 watt resistor. Apr 10 '15 at 19:12
• @RDrast 5000W resistor would work too ;o) (not accounting for frequency behavior of an actual 5kW resistor) Apr 10 '15 at 19:18
• Meant V × I not R Apr 10 '15 at 20:31