20 November, 2016 at 02:51 #34990
I’m looking for some direction on how to install LED lights on my tricopter with the F3FC board.
Would like to be able to turn them on/off with my Taranis if possible.
I’m a bit confused as to which pins I would draw power from, or maybe I’m to draw power from somewhere else?
I’m running SBUS and a FrSky X4R sb receiver, if that’s helpful.
Thanks =]20 November, 2016 at 13:56 #35003
I’ve run LEDs on a number of F3 and APM based FCs. How you control them is going to depend on the type of LEDs and how many you want to use. Are they the addressable type, or just simple on/off?
I use the addressable ones that come in a variety of shapes/sizes ( https://www.readymaderc.com/store/index.php?main_page=index&cPath=505_509 or http://www.buddyrc.com/accessory/led-lights.html?limit=48 for examples) and have three input and three output pins. Gnd, +5, and Signal. The Signal pin would be connected to the LED PORT on the F3FC. They can be chained together and can be programmed through the LED tab in the CleanFlight conigurator. You can turn them on and off by assigning an auxiliary channel range to the LEDLOW mode. (see attachments)
The other option would be to use a Pololu PWM Switch module ( https://www.pololu.com/category/142/rc-switches ) or other PWM LED controller ( http://www.buddyrc.com/buddy-rc-led-light-controller.html ) on one of the PWM outputs. You could use “channel forwarding” to pass an aux channel to one of the PWM outputs that you connect that PWM switch/controller.
That’s just a few options.
Attachments:20 November, 2016 at 17:50 #35013
Thanks LitterBug, you have given me a great place to start. Much appreciated!
I should also add that I have the simple on/off light strips currently, but am looking for something more advanced and will look at your suggestions.20 November, 2016 at 22:32 #35023
Just one advice. Use a separate BEC to power the LEDs. That way you will be less likely to have a flight controller fail due to overloading the BEC used to power the FC. Also, the addressable LEDs often like max 4.7 V due to technical limitations in how the high and low pulses on the signal cable are detected.21 November, 2016 at 15:24 #35032
FWIW, the variety of strips I’ve been using have all worked fine with 5V. I’ve seen it mentioned several times that lower voltage is sometimes required. Could be the combination of the Flight controller and the LED strips that are being used. Usually when lower voltage is required on the LED strips, it is because the FC is using 3.3V for the signal instead of 5V.
LitterBug24 March, 2017 at 05:43 #36984
Sorry for the noob question, but where on the F3FC board would you recommend tapping the +5V and GND?
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