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+====== GCA180 Relay unit for standard Turntables. ======
+[[english|{{  rocrail-logo-35.png}}]]
+[[:english|Content]] -> [[:hardware-en|Hardware]] -> [[:hardware-en#interfaces|GCA]]
+  *  [[mgv-overview-en|The GCA modules]]
+ \\
+^^^^By Peter Giling ^^^^
+\\
+===== Description =====
+A standard turntable like from Fleischmann or Märklin, has a three wire control.\\
+This controls both start/stop and direction.\\
+It is not possible to connect that directly to GCA50 or CAN-GC2, due to the higher voltage of this turntable.\\
+This unit makes it possible.\\
+Of course this way does not make it full Rocrail automatic controllable, but at least it is possible with two \\
+buttons in Rocview, to command the unit.\\
+It requires 16V ac/dc from any standard train transformer, and a connection to either GCA50, CAN-GC2 or GCA_PI02.\\
+On board is a selector to select which 2 out of 8 ports are used.\\
+The other 6 ports remain accessable by a second 10 pin PSS connector.\\
+If any of the two inputs recieves +5V, a direction is selected and the motor will start.\\
+After releasing the button the motors keeps turning until the next stop.\\
+In GCA50 settings select C2 for both ports.\\
+For CAN-GC2 , select single output in interface page of the button.\\
+The red, yellow and gray wires (as indicated on board print) are to be removed from handcontroller, and connected to the pcb.\\
+===== The prototype =====
+{{:mgv:hardware:2013-06-06_17-12-35.697.jpg?700|}}
+No boards available from www.phgiling.net
+===== The hardware =====
+|{{:mgv:hardware:gca180_sch.pdf|The schematics}}  |
+|{{:mgv:hardware:gca180_pcb.pdf|The pc-board and parts positions}}  |
+\\