Got it, thanks for the clarification.
RicZ
Flip D around. It can go there, or you can connect the anode of D to the cathode of LED, and the cathode of D to the anode of LED.
Like this:
Except D1 would be a 1N4001 instead of a green LED. As shown, it's essential the internal circuit of a bi-color 2 lead LED.
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
Randy, when you state anti-parallel, do you mean cathode to anode in series with a resistor like this?
I wired 1 Amp diode bridge rectifiers to the track using their AC input contacts. Then the DC output goes through a 1K Ohm resistor to 3mm green LEDs mounted on the layout. If something derails or otherwise causes a PSX-AR to trip, a quick glance at the LEDs shows us which train is at fault.
Scroll down about three quarters of the way. Loads of good info.
http://www.wiringfordcc.com/gorhlite.htm
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.
Yes but you should either use a bi-color LED or hook an ordinary 1N4001 diode anti-parallel to the LED to protect it from excessive reverse voltage.
New question: can an LED be wired directly from DCC track power (asuming a curent limiter) as a power to track indicator?