Elevator Trim position indicator using LEDS?

[Kaellis991]

@SimPassion

Wow, thanks for all of that.
It works in AM allowing me to make the connections to the arduino pins.
But I don't know how to add the rotary encoder to scroll through the lights as I rotate the trim wheel.

I like the idea of the bar graph, but for me I would need a shorter version if I can get a straight section of lights to work.
There may be a way to add individual small LEDs (maybe miniature SMD types?) on a curved board somehow, but that will take some engineering on my part.

[Kaellis991]

Perhaps a stepper or servo with a needle that sticks through the slot might be another solution.
Though I have never worked with those motors before.

[Ralph]

Nooo! Do not start messing in the script, just set the number of LED's you want to use.
The trim wheel and indicator do not need to know about each other, there's no link between these two.

[SimPassion]

So it works with the Piper Arrow III, quick and dirty (script updated for fixes) :

On first run with trim in neutral position

In-sim DN position

related leds showing

could be in the reverse way on leds

[SimPassion]

Perhaps a stepper or servo with a needle that sticks through the slot might be another solution.
Though I have never worked with those motors before.

Simple, with an encoder, just use "sim/flight_controls/pitch_trim_down" and "sim/flight_controls/pitch_trim_up" command depending on the way we rotate the encoder

Code: Select all

function pr_trim_change(dir)
	if dir == -1 then
		xpl_command("sim/flight_controls/pitch_trim_up")
	elseif dir == 1 then
		xpl_command("sim/flight_controls/pitch_trim_down")
	end
end

hw_dial_add("TRIM Encoder",pr_trim_change)

Just checked it works, all in the same logic.lua !

[SimPassion]

Just added hw_add_button to set trim straight forward for takeoff :

Code: Select all

--====================================================================================
--								CHECK PURPOSE
--====================================================================================

led_id_0 = hw_led_add("LED 0", 0)
led_id_1 = hw_led_add("LED 1", 0)
led_id_2 = hw_led_add("LED 2", 0)
led_id_3 = hw_led_add("LED 3", 0)
led_id_4 = hw_led_add("LED 4", 1)
led_id_5 = hw_led_add("LED 5", 0)
led_id_6 = hw_led_add("LED 6", 0)
led_id_7 = hw_led_add("LED 7", 0)
led_id_8 = hw_led_add("LED 8", 0)

led_nbr = 9

function compute_SI_Trim(trim_in)
	trim = var_cap(math.floor((led_nbr-(trim_in * 4.5)) - 4.5),0,8)
	-- trim = led_nbr - trim - 1		-- if it's required to invert the way leds are displayed, just un-comment this line
	-- print(trim)
	hw_led_set(led_id_0, trim==0)
	hw_led_set(led_id_1, trim==1)
	hw_led_set(led_id_2, trim==2)
	hw_led_set(led_id_3, trim==3)
	hw_led_set(led_id_4, trim==4)
	hw_led_set(led_id_5, trim==5)
	hw_led_set(led_id_6, trim==6)
	hw_led_set(led_id_7, trim==7)
	hw_led_set(led_id_8, trim==8)
end

xpl_dataref_subscribe("sim/cockpit2/controls/elevator_trim","FLOAT",compute_SI_Trim)

function pr_trim_change(dir)
	if dir == -1 then
		xpl_command("sim/flight_controls/pitch_trim_up")
	elseif dir == 1 then
		xpl_command("sim/flight_controls/pitch_trim_down")
	end
end

hw_dial_add("TRIM Encoder",pr_trim_change)

function pr_trim_takeoff()
    xpl_command("sim/flight_controls/pitch_trim_takeoff")
end
hw_button_add("TRIM Takeoff set", pr_trim_takeoff)

[SimPassion]

Not missing Ralph's mentioned Trim LEDs Indicator :

image.png (7.23 KiB) Viewed 2643 times

Just add the encoder handling in an own custom instrument logic.lua script

[Kaellis991]

So much to unpack there.
You guys make it look so easy....

Thanks for the code and the information.
I will set it all up this coming weekend.

[Ralph]

Don't mind the number of LED's in the Create/Edit tab, which is always 10, that's a bug in Air Manager. This bug is fixed in 4.2. It works good in the Home tab.

[SimPassion]

Don't mind the number of LED's in the Create/Edit tab, which is always 10, that's a bug in Air Manager. This bug is fixed in 4.2. It works good in the Home tab.

Thanks, I confirm I've seen this Ralph, though I've not taken it in account, however I'd let it on the side while taking a screenshot, to avoid to Kirk going to wonder