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+======GCA214 Loc Identification Receiver for WIO ======
+[[english|{{  rocrail-logo-35.png}}]]
+  * [[:hardware-en|GCA Hardware]]
+    * [[:hardware-en#wio|GCA WIO]]
+    * [[:wio:firststeps-en|WIO First steps]]
+{{  :gca:gca214_pict_02.jpg?200}}
+{{  :gca:gca214_pict_03.jpg?225}}
+ \\
+^^^^By Rob Versluis & Peter Giling ^^^^
+===== Description =====
+Based on the experiences from GCA204, there was the idea to create a small sensor unit for WIO system.\\
+Since display was already provided in WIO, this option was skipped here, and that results in a much simpler unit\\
+The basic reason for that was that a microprocessor is no longer needed.\\
+The WIO (Ctrl) where it is connected to, contains a much more powerful processor to translate the LIR (Loc Identification Receiver) data.\\
+Furthermore this unit can handle up to 3,5 Amp, so there is no damage with a standard Booster like ORD-3, when short circuit appears on the track.\\
+The serial output of GCA214 is made with an Opto-coupler, so the board can simply be supplied from the rails itself.\\
+It is connected to a serial input of the WIO system.\\
+The Loc Id Info will be available over R3, going to IC2a- and IC2b+ \\
+The higher this resistor will,be, the more signal is received, but that should be limited.\\
+Because all the current going to the rails will pass this resistor, it cannot be too high.\\
+Therefore two diodes (D4 and D5) are in antiparallel connection with the resistor.\\
+They limit the total voltage over this parallel combination to approx 0,5 V in both directions.\\
+That is enough to activate either IC2a or IC2b, and then passed via IC1a or IC2b towards the opto-coupler.\\
+Rocrail will be able with this unit to read back much information from the decoder on the main track,\\
+without the need of programmer and programming rail.\\
+Board and/or complete kits are available.\\
+\\
+^  Hardware  ^
+|  {{ :gca:gca214_sch.pdf|The schematics}}  |
+|  {{ :gca:gca214_pcb.pdf|The pcb and parts positions}}  |
+|  {{ :gca:gca214_parts.pdf|The bill of materials}}  |
+\\