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Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Ash Small wrote ...
Patrick wrote ...
for safety aircraft and surface vessels, customarily have: a white light in their nose and tail. a red light on the left. and a green light on the right.
do i remember that right?
The regulations for surface vessels are as follows:
I think that aircraft have a flashing white light instead of an 'all round' masthead light.
EDIT: Wikipedia says this:
Yep! this is exactly what i meant... but i was thinking of a blinking blue tail light to distingush manned from unmanned, becuase even military drone are supposed to yield to manned aircraft. so a blue light would indicate UAV, a white would indicate manned.
Sulaiman wrote ...
Flashing leds are much more conspicuous than steady so irrespective of the leds used have them flashing at 7Hz to 15 Hz. Flashing also allows higher peak intensity/current for a given temperature rise.
Yes i agree, but did you make up those 7-15hz numbers? or do you know those numbers are effective? please explain.
you could use a 3 or 10 watt RGB LED instead of an smt array. its like a dollar a watt on a star PCB. I stuck a 3 watt one in a pumpkin last year with an arduino and 2N7008 FETs. pretty fun junk box part. is it going to fly or is it on the ground?
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
lightlinked wrote ...
you could use a 3 or 10 watt RGB LED instead of an smt array. its like a dollar a watt on a star PCB. I stuck a 3 watt one in a pumpkin last year with an arduino and 2N7008 FETs. pretty fun junk box part. is it going to fly or is it on the ground?
it will fly, but what Rgb devices are you meaning, is there a example for purchase you can show?
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
lightlinked wrote ...
from mouser would be this 10 watt from ledengin but at that power level a cc switching regulator would be recommended which would mean 3 drivers.
Very cool solution lightlinked, i had seen these before, but theyve come along way since iv last seen the mixing ones... it even comes on that star PCB board.
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Multi Color LED Array for Conspicuosity and State Indication
