• grizeldi

    Speaking of CV light dimming, what to do if the PWM frequency gets so low that the blinking becomes visible?

    • Good question! Unfortunately, I’ve never had that problem so I don’t have a solution for you.

  • N Cliffe

    Dimming the lights – if it starts to flicker, change the resistors to larger values, and, if space, fit smoothing capacitor in the lighting circuit.
    On the stay-alive capacitors, I recommend you experiment with Tantalums in comparison to the Ceramics. I’ve put ceramics (like in your photo) into a few small locos and they have some effect. But, I then was shown a performance graph for ceramic capacitors, which has an alarming drop-off in energy stored as the voltage approaches the rated value (16v). In the DCC stay-alive use, the voltage is somewhere up near 16v, depending on chosen track voltage, so the drop in energy stored is significant. In contrast, Tantalum capacitors have a flat performance line. I then did some experiments with Tantalums, ending with a “physical volume” comparison, and concluded that the Tantalums perform better at the same physical volume in the model.
    Some more details of my work on http://nigelcliffe.blogspot.com

    • Hi Nigel, that’s a very interesting point! I did have trouble finding tantalums at first so I just went for the ceramics and kept going. I will for sure try tantalums and you have some very interesting posts on your blogs, nice job!

      • N Cliffe

        Pierre, Disqus has borked again (recommend you junk it and use something else for comments), and I just get the spinning disk of eternity in my browser. So that’s no more comments, sorry. (this posted via spare computer which I dont usually use)

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