Seems I read about “cut and throw” someplace recently.
I wonder how long until we see videos of this unit running over twigs?
Curmudgeon said:
Seems I read about "cut and throw" someplace recently.I wonder how long until we see videos of this unit running over twigs?
I was thinking the same thing…
Kevin,
The resistors look to me to be 2.2K ohm & there are resistors in the black shrink tubing… The 2.2K ohm resistors are hooked to the AUX power… They probably supply power to the LED’s… The transistors are for directonal turn on / turn off of the LED’s… Now you can not complain about what is in the front & rear light circuits as they are only LED’s… Looks like a good plan to me as the DCC’s decoders can be told what kind of lighting is in use,LED’s or bulb’s…
Not complaining. Rather, first mention I said it looks like they may have sorted the lighting out.
An LED is a transistor. Why would one need a transistor to turn a LED directionally on/off? Seems like overkill. A resistor, yes, to limit power to the LED or even a voltage regulator, but why additional transistors?
Tim,
LED’s are light emitting diodes… You need the transistors to act as a switches… To much reverse voltage or to much forward current can damage the LED’s…
And, on the previous offering, those parts were surface-mount on a board in the top of the firebox, and would not even get an incandescent bulb to glow.
An LED is a ‘diode’ and as such carries out its own switching duties. I believe a transistor is also a diode. I use resistors (nominally 680 - 750 ohm) to limit voltage to the LED.
As does the rest of the world.
That was one issue on the last offering, no resistors to use or remove and connect incandescent bulbs to the wires.
Tim,
LED’s are light emitting diodes… To much reverse voltage or to much forward current can damage the LED’s…
Go here & check out the voltages & currents for this blue LED…
http://www.purdyelectronics.com/pdf/AND190HBA.pdf
Transistors have at least 3 leads, collector, emitter & base, some have more… Hope this helps…
Bob,
many thanks. I always considered a diode to be a transistor, an electrical check valve.