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Message #28371

Liftmaster

Posts: 11

Gents

I want to try to connect LED’s for the first time. I have a lot of toggle switches but no LED.

I want to use them as my governor lights from the PMDG DC-6 (4 blue for RPM max/min and 4 orange for reverse)
The LED are going to be white since I have blue and orange caps for the LED’s.

I need bright LED because of the light caps. I have 20mA 3.2 - 3.4v LED.
Is it true I need 0,17ohm resistors?

Using 8 LED’s, will be using 8 resistors, right?

Being activated from MSFS and being PMDG I need to set mobyflight via the K<ROTOR… code to turn on the LED?

Thank you for any answer.
Dear regards
Ronald van Ingen

MSFS/PMDG/Volvo

2024-01-07 11:00

Message #28372

Liftmaster

Posts: 11

3.4v : 0,02a = 170ohm,…right?

MSFS/PMDG/Volvo

2024-01-07 11:12

Message #28388

XPRoberto

From: Hungary

Posts: 65

Hi,
1) YES. Since you drive all LEDs parallel independently from a different PIN, you need separate resistors for them
2) NO. your calculation is not correct. It would work, although a bit dimmer,
Check this for example:
https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-led-series-resistor
The resistor gets the remaining voltage. In your case 1.6 V / 0,02 A = 80 ohm.
But you can play with the values. Higher resistor gives dimmer LED.

----------------------------------------------------------------
Do you know that you can simplify: if($=1,0,1) ?
Use simply: 1-$

2024-01-09 14:35