Patrol 4x4 - Nissan Patrol Forum banner

Auxiliary switch LED too bright. Can I dim it?

1115 Views 2 Replies 3 Participants Last post by  ReefMagnet
OK electrical gurus.

I have recently installed a manual isolation switch in my dash so I can totally isolate the duel battery by switching the solenoid off.

The switch I used has an LED indicator which is very bright even during the day.

Can I install a resistor or something on the earth wire that I have grounded for the switch LED to reduce the voltage flow and therefore the LED brightness?

I would like to about halve the brightness so if a resistor would work what rating should I use?

If a resistor is not an option is there any other simple way to do it?

1 - 1 of 3 Posts
What he said ^^^ with one addition. The LED acts as a constant voltage source within certain current ranges, therefore you can reduce its brightness by decreasing the current flowing through it. the LED is probably drawing somewhere between 20 and 50 mA. This means that the inbuilt resistor is probably around the 240R to 600R mark. Resistors are worth a few cents each, so to half the current draw and reduce the brightness go buy say a 220R, 390R and 560R, maybe even an 820R, 1/4 or 1/2 watt resistor from Jaycar and try each one between the ground wire and ground until you get the brightness you like.
1 - 1 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.