Scart Pin 16 100 ohm resistor ok to use?

I know to get some TV's to switch over to RGB you need a +5v supply from pin 8 to pin 16, ive seen diagrams that show that a 180 ohm resistor joins pin 8 to pin 16. I dont have any 180 ohm resistors here would a 100 ohm or 220 ohm resistors be safe to use in place of 180 ohm?

 

220 should be fine too, if that doesn't work for some reason a 100 shouldn't blow anything either

 

It just limits current consumption from what I know. As long as the thing gets 5v it's happy, could probably use a 100kohm resistor for what it matters.

 

Ok thanks

 

That resistor is part of a voltage divider circuit.
The TV either expects around 1-3V(High) for RGB or less(low) for normal composite video.



U1 = 5V (comming from the console)
U2 = between 1-3V for RGB
R1 = 180 Ohm (or in your case either 100 or 220 Ohm)
R2 = 75 Ohm (that resistor is inside the TV, also known as input resistor)

So now you can check wether or not 100 or 220 Ohm will work.

For 100 Ohm you get a resulting voltage of 2,14V
For 220 Ohm you get 1,27V.

Both would be between 1-3V and thus will result in your TV switching to RGB.