40034_Nick Posted January 22, 2021 Share Posted January 22, 2021 Is there any way of controlling a 2 wire ground signal to change on a electro frog point change? So the track power from the point/track(2 wires) and the polarity from the frog( 1 wire of course) to go to the 2 wire signal so it changes the signal on point switch. In this case a am using a ESU switchpilot extension connected to a Switchpilotservo for switching the points. Link to post Share on other sites More sharing options...
40034_Nick Posted January 22, 2021 Author Share Posted January 22, 2021 (edited) here is the signal. https://www.dccconcepts.com/product/12x2-wire-lms-br-ground-signal/ I want to control it without the control board.. One way Other way Thanks Edited January 22, 2021 by 40034_Nick Link to post Share on other sites More sharing options...
WIMorrison Posted January 22, 2021 Share Posted January 22, 2021 (edited) This is what you need DCC Decoder Converter 3 Wire to 2 Wire (3 Pack) (dccconcepts.com) You change the polarity using the frog and this will change the signals Edited January 22, 2021 by WIMorrison Link to post Share on other sites More sharing options...
40034_Nick Posted January 22, 2021 Author Share Posted January 22, 2021 Oh thanks.. I called DCC concepts and the techie guy didnt have an answer for my problem.. Maybe he is unaware of this ? Link to post Share on other sites More sharing options...
40034_Nick Posted January 22, 2021 Author Share Posted January 22, 2021 I just spoke to him and he knows of them, hes just wasnt sure if it works with ESU.. I guess it doesnt matter at the end of the day. Really all i want is to swap direction of the current.. plus to minus and vice-versa Link to post Share on other sites More sharing options...
Grovenor Posted January 22, 2021 Share Posted January 22, 2021 That gadget does not work from the point frog wire it works of the pulses that would go to a point solenoid.. It would be easy to do what you want with a 3 wire signal. With a 2 wire signal I would drive a DPDT relay from the frog wire. (12V relay with diode in series connected from frog to either stockrail). The relay contacts can then be used to provide a reversing supply to the signal. Relays around £2 from the likes of Rapid Electronics CPC etc. 1 Link to post Share on other sites More sharing options...
40034_Nick Posted January 22, 2021 Author Share Posted January 22, 2021 Thanks. Those things look confusing How would you wire those up? there seems to be alot of connection options Link to post Share on other sites More sharing options...
Grovenor Posted January 22, 2021 Share Posted January 22, 2021 What do you mean by "those"? My relay suggestion or the DCC concepts gadget that won't work with your servos. Link to post Share on other sites More sharing options...
WIMorrison Posted January 22, 2021 Share Posted January 22, 2021 41 minutes ago, Grovenor said: That gadget does not work from the point frog wire it works of the pulses that would go to a point solenoid.. It would be easy to do what you want with a 3 wire signal. With a 2 wire signal I would drive a DPDT relay from the frog wire. (12V relay with diode in series connected from frog to either stockrail). The relay contacts can then be used to provide a reversing supply to the signal. Relays around £2 from the likes of Rapid Electronics CPC etc. I can assure you 100% that they do work and you do not need relays or anything else when used with the appropriate decoder or even a switch. You simply connect the DC positive line into the centre and switch the negative from side to side using the frog polarity switch. the will cause the out to swap over pos/neg to neg/pos which is what you need for the ground signal. If your decoder outputs neg/pos/neg and is configurable to constant output e.g. for LED signal then you can simply connect directly to it. Link to post Share on other sites More sharing options...
40034_Nick Posted January 22, 2021 Author Share Posted January 22, 2021 1 hour ago, Grovenor said: What do you mean by "those"? My relay suggestion or the DCC concepts gadget that won't work with your servos. Those DPDT relay things on the web.. Link to post Share on other sites More sharing options...
40034_Nick Posted January 22, 2021 Author Share Posted January 22, 2021 1 hour ago, WIMorrison said: I can assure you 100% that they do work and you do not need relays or anything else when used with the appropriate decoder or even a switch. You simply connect the DC positive line into the centre and switch the negative from side to side using the frog polarity switch. the will cause the out to swap over pos/neg to neg/pos which is what you need for the ground signal. If your decoder outputs neg/pos/neg and is configurable to constant output e.g. for LED signal then you can simply connect directly to it. I am going to test one from DCC concepts and see if it does work.. I hope it does as that will be game changing for me :-) .. Link to post Share on other sites More sharing options...
WIMorrison Posted January 22, 2021 Share Posted January 22, 2021 The circuit schematic that I have used is here. I used a 12v supply as I had one available. Just use whatever is required by the signals. 1 Link to post Share on other sites More sharing options...
Grovenor Posted January 22, 2021 Share Posted January 22, 2021 The OP said he wanted to work it off the actual frog, using track power,not from a frog switch. That DCC Concepts thing is just a latching relay dressed up , buy a relay from somewhere like CPC its more economical and you can do whatever you want with it. Just needs a bit more thought. Link to post Share on other sites More sharing options...
DCCconcepts Posted January 25, 2021 Share Posted January 25, 2021 On 22/01/2021 at 21:08, Grovenor said: The OP said he wanted to work it off the actual frog, using track power,not from a frog switch. That DCC Concepts thing is just a latching relay dressed up , buy a relay from somewhere like CPC its more economical and you can do whatever you want with it. Just needs a bit more thought. The DCCconcepts "thing" is not a latching relay. Best Regards, The DCCconcepts Team p.s Nick - contact us via our salesuk email regarding our adapter. 1 Link to post Share on other sites More sharing options...
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