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DCCOD detector

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  • Member since
    January 2008
  • From: florida
  • 276 posts
DCCOD detector
Posted by subman on Friday, December 31, 2010 11:57 AM

Not being able to reach Easee Interfaces (assembler of the DCCOD) maybee someone here can answer my question. I notice that the device has the Common leg of the 12VDC supply running through the little current measuring coil. What i`d like to know is can I run the positive leg through this coil instead. The reason I ask this is because I have some of the DCCOD detectors and mostly TCH Technology`s detectors which use the positive leg thru the coil and i`d like to use both detectors rather than order new ones.

Bob D As long as you surface as many times as you dive you`ll be alive to read these posts.

  • Member since
    February 2002
  • From: Reading, PA
  • 30,002 posts
Posted by rrinker on Friday, December 31, 2010 12:37 PM

 Not easily. You'd have to redo the circuitry up to the inputs of U1A to handle the opposite polarity. It's been too many years since my last college course on op amp circuit design for me to just do this in my head but you basically have to flip the + and - inputs and recalculate the feedback votlage divider R12 and R13.

 You really don;t have to do anything - just don;t common wire the DCCOD's to the other ones. If the outputs of the other ones are not current sinks like the DCCOD, add another stage, a sink is MUCH more efficient anyway. If the outputs on both types of detectors are the same, then they should all be fine running on a  common power supply.

                              --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

  • Member since
    January 2008
  • From: florida
  • 276 posts
Posted by subman on Friday, December 31, 2010 12:53 PM

Thanks Randy I was hoping you would chime in on this one. I`m "waffling" back and forth between optical & current detection.

Bob D As long as you surface as many times as you dive you`ll be alive to read these posts.

  • Member since
    February 2002
  • From: Reading, PA
  • 30,002 posts
Posted by rrinker on Friday, December 31, 2010 4:18 PM

 As mentioned in other threads, it really depends on what you are trying to accomplish/ A combination of both depending on the purpose is probably best.

                       --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

  • Member since
    March 2008
  • 53 posts
Posted by Valleycrest RR on Friday, December 31, 2010 4:25 PM

Why don't you ask the designer - Bruce Chubb?

I am sure he would know. Send him an email.

If there is a way to use his products instead of someone elses, he will tell you.

His web site is http://www.jlcenterprises.net

 

Tom

 

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