RMweb Premium Kris Posted March 31, 2022 RMweb Premium Share Posted March 31, 2022 Earlier this week I purchased a couple of controllers at an auction. These came with some control boards that I can’t identify. Can you suggest what they could be? Link to post Share on other sites More sharing options...
John ks Posted April 1, 2022 Share Posted April 1, 2022 This is a guess Some type of shuttle controller The clues On top of the board are Two terminal strips If you were to feed power from a DC controller into the 2 terminals on the top LHS (sp6) & connect the track to the 2 terminals top RHS (SP7), the track power would be reversed by one of the relays (top RHS) & the other relay (top LHS) will turn track power on or off Another clue The four terminal strips (SP1,SP2,SP3,SP4) have the following markings "- LED + LDR - " The - goes to the negative side of a LED (as connected in SP1. this LED would be used for remote indication & is in parallel with LED1 on the PCB) The + goes to the positive side of a LED The + also goes to a LDR (Light Dependant Resistor) The third terminal of SP1 which looks to have a "-" next to it would go to the other side of the LDR The loop of wire in SP2 is where a LDR would normally be connected The terminal at the bottom centre is marked " + supply - SP5" As at least one of the relays is marked DC12V , I would expect the supply voltage to be 12v DC with + & - connected as shown on the PCB Hope this helps John 1 Link to post Share on other sites More sharing options...
RMweb Premium Kris Posted April 1, 2022 Author RMweb Premium Share Posted April 1, 2022 7 hours ago, John ks said: This is a guess Some type of shuttle controller The clues On top of the board are Two terminal strips If you were to feed power from a DC controller into the 2 terminals on the top LHS (sp6) & connect the track to the 2 terminals top RHS (SP7), the track power would be reversed by one of the relays (top RHS) & the other relay (top LHS) will turn track power on or off Another clue The four terminal strips (SP1,SP2,SP3,SP4) have the following markings "- LED + LDR - " The - goes to the negative side of a LED (as connected in SP1. this LED would be used for remote indication & is in parallel with LED1 on the PCB) The + goes to the positive side of a LED The + also goes to a LDR (Light Dependant Resistor) The third terminal of SP1 which looks to have a "-" next to it would go to the other side of the LDR The loop of wire in SP2 is where a LDR would normally be connected The terminal at the bottom centre is marked " + supply - SP5" As at least one of the relays is marked DC12V , I would expect the supply voltage to be 12v DC with + & - connected as shown on the PCB Hope this helps John Thanks for that John, I'll take a closer look tomorrow to see if there are any more clues. The really bizarre thing was there were 7 of these in the same box as the controller. Link to post Share on other sites More sharing options...
RMweb Premium Kris Posted April 2, 2022 Author RMweb Premium Share Posted April 2, 2022 Here are 4 extra photos to show the details on each edge. 1 Link to post Share on other sites More sharing options...
RAF96 Posted April 3, 2022 Share Posted April 3, 2022 Feeding off the deductions in the earlier reply it would seem the LDR connections could be for an IR sensor to perform the pass-by detection initiating the reversal. Similar other make shuttle devices use diodes across a track break to perform the pass-by detection. 1 Link to post Share on other sites More sharing options...
cliff park Posted April 3, 2022 Share Posted April 3, 2022 Just out of interest what is the chip with the capacitor/resistor on top? I can't read it in any of the pics. Link to post Share on other sites More sharing options...
RMweb Gold Nickey Line Posted April 3, 2022 RMweb Gold Share Posted April 3, 2022 One of the relays appears to have suffered a fatal burn-out! 1 Link to post Share on other sites More sharing options...
Crosland Posted April 5, 2022 Share Posted April 5, 2022 On 03/04/2022 at 21:02, Nickey Line said: One of the relays appears to have suffered a fatal burn-out! Or the soldering iron got a bit close when making the modification. The screw terminals look rusty! Link to post Share on other sites More sharing options...
RMweb Premium Kris Posted April 5, 2022 Author RMweb Premium Share Posted April 5, 2022 7 hours ago, Crosland said: Or the soldering iron got a bit close when making the modification. The screw terminals look rusty! They are rusty, it looks like the box that they were stored in got wet. Link to post Share on other sites More sharing options...
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