gca94-en
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— | gca94-en [2023/01/21 16:15] (current) – created - external edit 127.0.0.1 | ||
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+ | ====== GCA94 8 Input power efficient current detector, also suitable for high current G and 1 Track. ====== | ||
+ | [[english|{{ | ||
+ | [[: | ||
+ | * [[mgv-overview-en|The GCA modules]] | ||
+ | \\ | ||
+ | |||
+ | ^^^^By Richard Andrews, Helmut Schäfer and Peter Giling ^^^^ | ||
+ | \\ | ||
+ | |||
+ | ===== Description ===== | ||
+ | The current detector [[http:// | ||
+ | But many railroaders experience the 1,2 Volt loss of power as not appreciable.\\ | ||
+ | And also, the current is limited to the maximum load of the bridge rectifiers on the input side of GCA93.\\ | ||
+ | That will basicly disable the use of GCA93 with G-track or 1-track railroaders.\\ | ||
+ | So we created a better solution.\\ | ||
+ | Richard Andrews had this same thought and has been experimenting with different options by using a current tranformer more or less directly connected to A/D converter.\\ | ||
+ | In that way, without any form of amplification, | ||
+ | It was fearly easy to add an amplificator to it, but that also increased the sensitivity to distorsions.\\ | ||
+ | In Germany, | ||
+ | This eliminates the sensitivity to distorsion, as always produced by running trains.\\ | ||
+ | [[http:// | ||
+ | This superb design of Helmut Schäfer is permitted to be used for the GCA94.\\ | ||
+ | GCA94 is made to accept 8 inputs, and can be used like GCA93, straight to GCA50, CAN-GC2, GCA_PI02 and WIO.\\ | ||
+ | No measureable power loss is the result, and there is no need to protect each input with a multifuse, like on GCA93.\\ | ||
+ | The unit is functional compatible with GCA93, also each input has its own indicator led.\\ | ||
+ | One of the two wires to the rails is feeded through any of the coils, which will mostly be sufficient for any locomotive or illuminated waggons\\ | ||
+ | For more sensitivity, | ||
+ | 10K resistors, mounted between the two wheels of a waggon.\\ | ||
+ | One other and better way to increase the sensitifity is to feed both rail wires through the coil, **but in opposite directions**.\\ | ||
+ | **Note:** | ||
+ | This unit is strictly made for ac, because it uses a current transformer.\\ | ||
+ | So any digital system (which is also ac!) AND the good old analog ac Märklin will work.\\ | ||
+ | But using it in an analog dc system, including all scales, will most certainly not function at all.\\ | ||
+ | |||
+ | |||
+ | |||
+ | ===== The board, professionally made. ===== | ||
+ | | {{: | ||
+ | | though parts are reasonably small, | ||
+ | |||
+ | ===== The hardware ===== | ||
+ | | {{: | ||
+ | | {{: | ||
+ | | {{: | ||
+ | \\ |
gca94-en.txt · Last modified: 2023/01/21 16:15 by 127.0.0.1