RMweb Gold pheaton Posted January 25, 2021 RMweb Gold Share Posted January 25, 2021 Hi All, Anyone know of any dcc decoders for the above signals, I want to convert all mine to DCC operation so I can get some sort of automation based on feedback, but the problem I envisage is that the signals require a 12v input because the resistors for the signal are on the interface board, and can't be bypassed... Anyone ever done this before? Thanks Simon Link to post Share on other sites More sharing options...
WIMorrison Posted January 25, 2021 Share Posted January 25, 2021 You can use most accessory decoders - assuming the lamps are wired with a common positive, or are all individual, a good one that is cost effective and should meet you needs is a DR4018. 1 Link to post Share on other sites More sharing options...
RMweb Gold pheaton Posted January 25, 2021 Author RMweb Gold Share Posted January 25, 2021 Hi WIMorrison... good point should have said...they are all common negative.. Link to post Share on other sites More sharing options...
WIMorrison Posted January 25, 2021 Share Posted January 25, 2021 I don't know of any accessory decoders that are common negative Sorry, perhaps someone hand provide a way of solving the issue. Link to post Share on other sites More sharing options...
RMweb Gold pheaton Posted January 25, 2021 Author RMweb Gold Share Posted January 25, 2021 32 minutes ago, WIMorrison said: I don't know of any accessory decoders that are common negative Sorry, perhaps someone hand provide a way of solving the issue. further research shows that there appears to be an adaptor by the same manufacturer to covert each output to common anode, but it does add greatly to the cost.. Link to post Share on other sites More sharing options...
RMweb Gold Roy Langridge Posted January 25, 2021 RMweb Gold Share Posted January 25, 2021 (edited) I am wondering if you use a decoder that supports logic functions, could you drive one side of a NAND gate chip with the other half permanently tied high? That would mean that the output would be a reverse logic signal and some NAND chips will quite happily power an LED*. Quad NAND 2-input chips can be bought for about £1.50. That would drive four LEDs. * you would still want a current limiting resistor. Edit: or of course you could just use a NOR gate! Somebody didn't get enough sleep last night. Roy Edited January 25, 2021 by Roy Langridge Being stupid! Link to post Share on other sites More sharing options...
Nigelcliffe Posted January 25, 2021 Share Posted January 25, 2021 1 hour ago, pheaton said: further research shows that there appears to be an adaptor by the same manufacturer to covert each output to common anode, but it does add greatly to the cost.. "greatly to the cost" = a transistor or an opto-isolator. Which cost pence as components. - Nigel Link to post Share on other sites More sharing options...
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