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Author Topic: DZ126 with keep alive  (Read 2278 times)

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GM50 4164

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DZ126 with keep alive
« on: September 01, 2019, 09:51:02 PM »
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Anyone know if a keep alive can be used with a Digitrax DZ126? Some caps wired together like we do with the ESU decoders?
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Benjamin H

peteski

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Re: DZ126 with keep alive
« Reply #1 on: September 01, 2019, 11:08:54 PM »
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I don't see why not.  I don't have one handy to show where the negative side of the caps will be attached, but if nobody else posts that info, I can likely do it tomorrow.
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peteski

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Re: DZ126 with keep alive
« Reply #2 on: September 02, 2019, 06:32:06 PM »
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Ok, here is a diagram of the DZ125/126 decoder and a recommended Keep Alive circuit.
Red arrow points to the the positive side and the black arrows to the negative side (hook up to any pad pointed by the black arrows).  Also pay attention to the polarization of the capacitors (they will burn up if installed backwards).
For L1 @woodone recommends Digikey 100 uH 240mA inductor (coil, choke), and I concur.  Part # 587-1628-1-ND.

For a similar Keep Alive install in Digitrax TL1 decoder see https://www.therailwire.net/forum/index.php?topic=47620.0

« Last Edit: September 02, 2019, 07:09:46 PM by peteski »
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