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Message #10669

Ridgeandgable

Posts: 131

Hi Guys

I have setup my LED on pin 6 Mega board with a 1k resistor but it is too bright for the autopilot panel, I have tried a 220ohm resistor and that is to dim, I thought if I used the brighter 1k, I would be able to let mobi reduce the brightness but this is greyed out and it won't let me, any ideas?

Thanks

2018-11-08 16:49

Message #10671

pizman82

Moderator

From: ETSI, Germany

Posts: 6010

Supporter

For those electrical Questions Stephan is more experienced.....

Basicly... I will recommend to use a resistor with a Value between the two used ones..... If A is to bright and B is to dark.... Simply use a resisitor with a Ohm Value in middle of these two.
Other way is to use another LED. Stephan mostly recommend the low current - Ultrabright led. They can easy dimmed with correct resistor.

About your question: In Mobiflight there is no feature to set brightness of a LED.... The greyed checkbox is only for Arcaze Boards ( NOT for Mega Boards) Thats a relict of the fist days.... In case 98% of Users work with mega this feature is not realy supported today.

Good Luck !

2018-11-08 18:05

Message #10678

StephanHo

From: EDDG, Germany

Posts: 1867

Supporter

Hi,

with 1k the LED is bright and with 220 Ohm she is darker? That is not logical or better pysical not possible. If you reduce the resistance you raise the current. More current makes the LED brighter. Vice versa should be the normal behavior.
Either your description is not right or you are confusing something.
With a normal LED (i.e. a red one) you have a current of 3 mA with a resistance of 1k and with 220Ohm you have a current of 13mA. So is the ohmic law.

Please be so kind and check this and report your results.

Grüße,
Stephan (Time: UTC+2)

2018-11-09 00:49