It's always kinda nice to see inside components not readily available to ordinary mortals, so here's a look inside a couple of LED aircraft components. Mainly notable for the well-engineered approach common with aircraft electronics.
The Darlington transistor (two cascaded transistors internally for higher gain) may be a very simple soft-start device that is basically a transistor with a base resistor from the positive rail and capacitor to negative rail so it turns on slowly. That could be to emulate a tungsten lamp lighting or to avoid high inrush current at power-up.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
The Darlington transistor (two cascaded transistors internally for higher gain) may be a very simple soft-start device that is basically a transistor with a base resistor from the positive rail and capacitor to negative rail so it turns on slowly. That could be to emulate a tungsten lamp lighting or to avoid high inrush current at power-up.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
Beautiful, by years I just could try to imagine how these reader lights were constructed, now I learn that, thanks…
You do realize that "removing" that rivet didn't actually do anything, right? RIGHT?
Little tip, you should go to an older ICE train. They have those nifty dot matrix LED signs with the individual dies bonded in it to form 16 characters of 5×7 lines.
the transistor is likely a constant-current source to feed the led
That's why all the 'stuff' was missing on my last flight.
Im guessing you travel on my local trains several times a day ?
Who said Scotish do not have sense of humour? Not me, they can say the most amazing things without even grimming.
You're worried about putting the polarity backwards…
A workshop… colleague… plugged a set of car batteries in backwards, blowing up 6 months of my work.
I guess red is the new negative.
Fantastic as always
How… did you get them? Edit: What plane were you on? (737, 747, A380, A320)
Wow lol 😆 🤣 😅
Should've asked for one of the IFE displays XD… They're made by Panasonic and run a Linux client that connects with a server (running WinNT 4.0 on 747s)
Anyone know where I can get one of these? I want to put it in my car lol
FYI: The voltages for systems on commercial aircraft are either 28 VDC or 115 VAC@400Hz.
No Lavatory smoke detector?
Do you think you can grab one of the engines next time? I would love to see you take one of those to bits and pick about it.
LED are junk