User Tools

Site Tools


gca214-en

Differences

This shows you the differences between two versions of the page.


gca214-en [2024/05/13 19:54] (current) – created - external edit 127.0.0.1
Line 1: Line 1:
 +======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}}  |
 +\\
 +