linux-works wrote:what I'm saying is that if you have a set of contacts that go 'opposite' of how you want the led to come on, reversing the + and - on the led, reversing where its 'terminal' lead goes and which is its 'turn on' lead; that will invert its operation.
I also posted a pic a week or so ago about a simple transistor inverter using an NPN. if you pull the 'output' from the collector, you are inverting. if you pull the output from the emitter, it will not invert.
it would be worthwhile building that on a bread board, just for learning.
I found it here
and I have even actually bothered to try and draw the schematic as well as read up on transistors and actually trying to understand your simple circuit.
I will soon move on to try and locate where on the Epsilon24 I can connect the Base of the transistor as I reckon that is the key to succes (I do hope I will be able to find the 12VDC and GND). Alas, understanding the Epsilon24 schematic (though undoubtedly educating) is a somewhat more exhaustive exercise for me. Oh, and it is bedtime here in Denmark now...
As luck will have it I seem to remember that I have a some excess transistors and I know I have a variety of resistors lying about.
I hope to get back to you tomorrow with a nice picture of how I intend to wire it all up and then you can tell me if I have passed the examn!