gca214-en
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+ | ======GCA214 Loc Identification Receiver for WIO ====== | ||
+ | [[english|{{ | ||
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+ | ^^^^By Rob Versluis & Peter Giling ^^^^ | ||
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+ | ===== 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, | ||
+ | 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.\\ | ||
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+ | Board and/or complete kits are available.\\ | ||
+ | \\ | ||
+ | ^ Hardware | ||
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