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Post by raptorengineer on Jan 7, 2019 0:25:27 GMT -8
hey has anyone open up newer athearn locomotive with led lights ether dc or tsunami 2? i wondering if led have resisters on it or not.
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Post by upmodeler1973 on Jan 7, 2019 18:47:53 GMT -8
I believe they are built into the 21pin board of a DC model.
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Post by raptorengineer on Jan 13, 2019 18:03:53 GMT -8
ah ok. i order athearn bnsf es44ac (LNG) non-sound Unit. now i do have spare tsunami gen 1000 es44ac sound board laying around. my plan is to take out the 21pin dc board and replace it with tsunami gen 1000 es44ac sound board. since this new es44ac has led lights i guess i have to buy resisters i think 1k ohm is common for led.
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jfa
New Member
Posts: 4
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Post by jfa on Jan 17, 2019 21:44:43 GMT -8
1K ohm, 1/4Watt is a good choice for led resistors
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Post by bnsf971 on Jan 18, 2019 19:43:58 GMT -8
ah ok. i order athearn bnsf es44ac (LNG) non-sound Unit. now i do have spare tsunami gen 1000 es44ac sound board laying around. my plan is to take out the 21pin dc board and replace it with tsunami gen 1000 es44ac sound board. since this new es44ac has led lights i guess i have to buy resisters i think 1k ohm is common for led. Is it a TSU 1000? Or a GN1000? GN 1000 has 1.5v outputs for the Athearn bulbs, the TSU or AT1000 are 12v. |
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Post by raptorengineer on Jan 19, 2019 14:42:35 GMT -8
it's TSU-GN1000 board
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Post by raptorengineer on Jan 21, 2019 23:41:29 GMT -8
 so i got my es44ac 5815 today and open it up and replace the dc board with spare tsu-gn1000 it worked well. as for led i was testing the ohm resistors since i had bag full. and 1k ohm resistor was way to bright i thought it was going to melt the plastic or burn out the led. so i went down to 560 ohm resistor for headlight and rear lights and it look really good. i did try 560 ohm on ditchlight and that was extremely bright so i when down to 390 ohm resister and it look really good as well. now the led wires where i think 36 gauge or maybe 30 gauge and red and black witch i really like. so over all it went really well i happy with it. |
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Post by ncrc5315 on Jan 22, 2019 14:56:20 GMT -8
Something isn't making sense here, you say the lights are way too bright, then went to a lower resistor valve, this should have caused the LED's to be even brighter, not less.
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Post by Mark R. on Jan 22, 2019 15:23:16 GMT -8
I'm even more confused .... are you using LEDs or bulbs ? The GN-1000 board only outputs 1.5 volts - it won't drive LEDs.
Mark.
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Post by raptorengineer on Jan 22, 2019 16:21:03 GMT -8
oh really maybe it how i wired it. i didn't use the 14+ hole that on decoder for i think common. i wired LEDs that came with locomotive it using the tabs, one positive and one negative. and it seem to work one way. so if you have wire with resister clip on wrong tap it won't light. as for resisters huh i thought lower number on ohm less the brightness. maybe is board is revised on resistor and still working i'm not sure. it seem to run great.
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Post by ncrc5315 on Jan 22, 2019 16:42:33 GMT -8
as for resisters huh i thought lower number on ohm less the brightness. maybe is board is revised on resistor and still working i'm not sure. it seem to run great. Just the opposite, the higher the number, the greater the resistance, hence, a larger voltage drop across the resistor, the lower the current through the resistor, the less light that will be emitted from the LED. It takes 1volt, to push 1amp, through 1Ω of resistance. Increase the resistance, without changing the voltage, the current goes down. Increase the voltage without changing the resistance, the current goes up, on the other side, if the voltage is decreased, and the resistance stays the same, then the current will go down. For further reference, look up Ohm's Law Wheel. |
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