BEC dc-dc power, can I program prop2 on battery?
Need some quick help, consulting if you will.
I got a cheap BEC from adafruit http://adafru.it/1385
Have some 2811 leds. JMs pixel driver and my p2 eval.
Im very much a peek and poke amateur here. typing on mobile so bear with me.
My gut tells me I shouldnt program the p2 while its battery powered by the BEC.
Will the lights be fine running off the BEC while prop is usb powered and programmed by the computer? the grounds will still be connecting to each other correct? as well as the 5v when signalling the leds. so im still iffy on it.
I think the jumper on ldo vin 5v on the eval is for its own power, I dont wanna hook up the bec output to the prop that way, right? Do I wanna solder some pins into the aux 5v/gnd area, by the aux usb 2a connector. and plug the BEC there to battery power the prop?
also. i have two of the BECS. can i hook their outputs together? or should i keep them separate? I realize ill only have about 6amps max (thatll be hot), and I plan on doing basic math based on80ma for each led, and i can calculate my all on max brightness that way. But Im wondering if I'll have to keep the 5vs separate when powering both ends of the led strips.
anything helps. dont wanna fry my p2 or burn up one BEC with the other!
I cant figure out how to embed pics. I got all my stuff in hand. I know JMs pixel driver works with 2811bs for a fact. I hav hands on experience with a 12 led ring neopixel from adafruit but I just lit that while powered from pc, and debugged there. but here im gonna have upwards of 5 meters of leds. 150 leds on my 5m strip. dont wanna trip or brown out my usb on pc.
further along tonight. I see the schematics say use the port at my own risk. j502
I bit the bullet and powered it from the BEC, and the eval board lights up. no smoke. moving on.