Best Of Keystone Customs announces Angled numberboards for your SW Diesels

[tehachapifan]

Here are the resistors in all their glory 

[peteski]

Ah, blue, gray, black, red, black. these are 68k 1% (precision) resistors. Those white LEDs are more efficient that I thought!  Thanks Russ!

If those LEDs are in parallel (both positive leads and both negative leads are tied together, then they are daisy-chained with the resistor then with the DCC track voltage of around 13V the current passing through each LED is around 0.00013A (0.07mA or 70 micro Amps).  That's amazingly low!

[tehachapifan]

Yes, on the SW1200 numberboards I have both positive leads tied together and both negative leads tied together. One side is then connected to the resistor off the function output pad and the other side to the blue common. On my SW1500 numberboards, I tied the negative lead from one LED to the positive lead on the other, then connected the remaining loose lead off one LED to the resistor off the output pad and the other loose lead off the other LED to the blue common. I never know for sure which is the positive lead, so I always test to see which way works first. Incidentally, I thought the latter description would be considered a daisy chain installation, not the former. This is why I prefer diagrams!

[Lemosteam]

Cover your eyes son, there are pictures of naked resistors! 

[MK]

Somebody report this to a Mod!  I don't think we all such Adult photos on TRW. 

[Lemosteam]

This egregious act rivals the similar perversity of the Polar Expesscapade of 2014, ohm the humanity!

[tehachapifan]

Ha!

[peteski]

Yes, on the SW1200 numberboards I have both positive leads tied together and both negative leads tied together. One side is then connected to the resistor off the function output pad and the other side to the blue common. On my SW1500 numberboards, I tied the negative lead from one LED to the positive lead on the other, then connected the remaining loose lead off one LED to the resistor off the output pad and the other loose lead off the other LED to the blue common. I never know for sure which is the positive lead, so I always test to see which way works first. Incidentally, I thought the latter description would be considered a daisy chain installation, not the former. This is why I prefer diagrams!

What you call daisy chain (or Christmas light like) connection of components is series connection. The other way (one side of the leads from all the components tied together and the other side leads also tied together) is parallel. Daisy-chain=series  should be easy to remember.

Of course you can have a mixed circuit like you did where the LED pair is parallel-connected, and then that circuit is then series-connected with the resistor.

[peteski]

This egregious act rivals the similar perversity of the Polar Expesscapade of 2014, ohm the humanity!

Oh man!  I totally forgot about that, and never completed the magazine article!  Too many projects!  Maybe I should just give up on having it published and just release it to the public domain . . . 

[tehachapifan]

What you call daisy chain (or Christmas light like) connection of components is series connection. The other way (one side of the leads from all the components tied together and the other side leads also tied together) is parallel. Daisy-chain=series  should be easy to remember.....

That's what I figured, but every now and then it seems like one of the terms gets used differently and then I'm not sure we're all speaking the same language.

[peteski]

That's what I figured, but every now and then it seems like one of the terms gets used differently and then I'm not sure we're all speaking the same language.

Parallel and serial connection are totally different and unambiguous - they should never be used interchangeably (if a person is using them properly).    The confusion might arise when both methods are used in the same circuit (like the way you hooked up those LEDs).  The LEDs themselves are connected in parallel, but then the parallel-connected LED circuit is connected in series with a resistor.