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| − | == General ==
| + | #REDIRECT [[Phototransistors]] |
| − | These components react to light. <br>
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| − | Reinforced by a receiver, included in all -I decoders, certain light pulses can be processed. <br>
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| − | The vehicle shall be equipped with 1 or 2 IR FTR. <br>
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| − | Thus, the signals can be picked up from the roadside. <br>
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| − | <br>
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| − | Also, the XT-module needs a phototransistor for receiving the feedback from the DC-Cars.
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| − | <br>
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| − | <br>
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| − | '' 'Examples IR-FTR:' ''
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| − | [[File:Fototransistor.png|Fototransistor Anschlußbelegung|right]] | + | |
| − | [[File:Fototransistor vorn.png|Fototransistor Anschlußbelegung|right]]
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| − | [[File:Anschluß-Fototransistor.jpg|Fototransistor Typ neu|right]]
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| − | Only [[IR-FTR]] phototransistors of SMD - 0603 do matche the DC-Car System <br>.
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| − | The notes refer only to these products. <br>
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| − | <br> In direct comparison with a LED crystal looks bigger and black.
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| − | <br>
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| − | As the use of colored enamelled wires has been proved, the recommendation is: <br>
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| − | '' '+ Phototransistor = violet (from 2013)' '' or copper-colored (confusion with indicator) or orange or red (confusion with +) <br>
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| − | - Phototransistor = green (from 2013) <br>
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| − | <br>
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| − | '' 'Measure of a phototransistor' '' in
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| − | With a sensitive ohmmeter in the setting 100 Kohm can get different ads, when light and no light is incident on the phototransistor. <br>
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| − | This does not work with all gauges !! <br>
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| − | '' 'Check with a test circuit' 'in
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| − | An LED in series with a resistance of 1 kOhm is lit at 5 volts - 12 volts.
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| − | The circiut is separated and the Fototransitor is clamped in between.
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| − | With the corect polairity the LED glows, when light falls on the phototransistor.
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| − | Without light, it goes out.
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| − | If by mistake an IR-LED have been used instead of a Fototranistor, the LED is bright and constant. <br>
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| − | Such '' '[[: Category: Tester | Tester]]' '' is '' '[[remote control]]' '' installed with the Plus feature <br>.
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| − | In the charging socket, a plug with 2 cable is plugged. <br>
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| − | '' 'Known problems with phototransistors' '' <br>
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| − | Another stronger light source can "blinded" the phototransistors.
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| − | Since they are already fully controlled by the moment, no signals can be processed.
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| − | <br>
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| − | <br>
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| − | DC Car will only respond to very short distance or not at all:
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| − | * The terminals + - of the photo-transistors may be reversed.
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| − | * When gluing,, no superglue must be on the front of the lens.
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| − | (UV glue is best suited for the installation of LED and in particular the phototransistors ) <br>
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| − | Also available in www.modellautobahnen.de/shop. <br>
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| − | [[Category:Elektronik]]
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| − | [[Category:Bauteile]]
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| − | [[Category:DC-Car-System]]
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