What polarity?? It is an AC signal, it has no polarity!This has lead to the development of DCC “Automatic Reversers” that allow the loop to be automated. These Automatic Reversers work by sensing the short at the gap and reversing the polarity quickly.
Gert, if you find time I'm willing to help out with this and I do have model trains, both DCC and DC but no auto reverse unit.Gert van Loo wrote:I understand the problem and the solution.
What you say is that it first needs to switch the power ON and later it has to reverse it.
The article I found had a number of track situations which need the circuit.
On the board I have a CPU, 4 H-bridges and a A/D converter. So I could build a program option for that.
But it is not a trivial program to write. (What if the operator reverses the train???)
1/ I have no DCC rail track. I did the development on a track which was lend to my by Hornby. (Again: Thank you Hornby!).
2/ I think the system gets very complicated.
3/ I am short of time at the moment.
4/ The short circuit protection of the Gertbot is extreemly fast.
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