I purchased a Model Power Lighted Figure recently. It uses fiber optics and LEDs to make the tip of a cigar glow. How do you folks normally set these figures up on your layouts with regard to safely connecting them to a power supply? The thin wires are super delicate and not much bare wire is exposed. I half feared snapping one of the wires just unwinding it from the way it was stored in the packaging.
At present, I have only a carpet layout so I was simply trying to get the figure to light long enough for a little vignette that I was working on:
(The "lit" cigar was supposed to explain why the nurse from the Board of Health condemned this batch of otherwise yummy July 4th chili :-).
I started by touching the wires to a 9-volt battery because it was lower than the 12-17V, 10mA (AC/DC) rating of the figure. I assumed that the lower voltage would be safe to start with but it wasn't enough power to produce any glow. Next, I tried alligator clips attached to wires coming from an MTH DCS Remote Commander-18V transformer. Because the wires are so tiny and not much metal is exposed, it was hard to tell how much contact was being made with such a tiny wire tip -- even though my alligator clips were fairly small-sized. Occasionally (maybe twice), I got a single glow but I couldn't make it steady. Lastly, I switched to a variable controller so that I could manually increase and decrease the volts and see if I got any light. Similarly, I got one single short-lived glow then nothing. At one point, I had the controller cranked to full throttle.
Sitting down to type this, I realize that the transformer behind both controllers was +1 volt too high -- that is, 18 volts compared to the stated max. of 17 volts. I don't have the number of amps on hand to compare that value to the recommendation but I see that a Lionel 18V DC wall power pack puts out 2000mA/2 amps. The rated voltage is 10mA. So, I'd say that both my volts and amperage were too high. (I thought the output from the transformer was lower. I should have measured first.)
Fortunately, the figure was on clearance and on sale. So if I fried the LED, I still have a figure worth $2.00.
Any tips for using these figures safely -- either if this one is salvageable or if I get one at a future date? There were no instructions for adding resistors or anything for clueless electronics novices like me.
Thanks in advance,
Tomlinson Run Railroad