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