Changes between Version 16 and Version 17 of ReverseEngineering


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Timestamp:
07/06/10 09:14:18 (14 years ago)
Author:
art
Comment:

Name changed from 01102009 to ReverseEngineering

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  • ReverseEngineering

    v16 v17  
    1313After spending several hours the main schematics of those button boards has been decoded. Here is an image, I've created with EAGLE, showing how those both PCB works. 
    1414All the status LEDs resistors are 80Ohm, so I assume they were driven originally with around 3,3V. The background LEDs seems to be driven with 12V pwm modulated signal, however not sure for now. On the E39-forum.de somebody found out the manufacturer of compatible rotating knobs for the 4:3 monitor. I think for 
    15 the 16:9 it could be the same. The original knobs where a special development for Alpina. The compatible one is that one: Grayhill 61C22-01-04-02, [http://datasheet.octopart.com/61C22-01-04-02-Grayhill-datasheet-67218.pdf data sheet]. Please visit the [wiki:/openbm/Encoders Encoder] page for more information about used encoders. 
     15the 16:9 it could be the same. The original knobs where a special development for Alpina. The compatible one is that one: Grayhill 61C22-01-04-02, [http://datasheet.octopart.com/61C22-01-04-02-Grayhill-datasheet-67218.pdf data sheet]. Please visit the [wiki:ReverseEngineering/Encoders Encoder] page for more information about used encoders. 
    1616 
    1717'''Note''': The both encoders showed on the image, do not show the original connecting, but the way, how I changed it in order to easy access them with an uC. So recheck this first, if you like to build same thing!!!