Changes between Version 7 and Version 8 of Prototype/Two


Ignore:
Timestamp:
07/05/10 19:44:07 (11 years ago)
Author:
art
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • Prototype/Two

    v7 v8  
    99[[Image(http://www.tevs.eu/stuff/bmw/IMAG0030.small.jpg, 220px)]] 
    1010 
    11 Finally after one week the PCBs arrived and I was surprised about the quality. Unfortunately my camera was not available at this time, hence I had to make pictures with my cell-phone :( 
     11The connectors on the right board are used for the programmer device. Later they will be used to drive external Relais or FETs. They can be use dfor example to switch audio sources for the original BMW Radio coming from CarPC or DVD/DVB-T. The connectors on the left board are the main car connector: DimmLight (background light pwm signal), GND, IBus Signal and +12V current. 
    1212 
    1313== Build == 
     14Finally after one week the PCBs arrived and I was surprised about the quality. Unfortunately my camera was not available at this time, hence I had to make pictures with my cell-phone :( 
    1415After several weekends of soldering (have I told already that I am working only on weekends on this project), I build the prototype into the housing. Now I am using 14MHz crystal to drive the ATmega. Additionally I am using [http://www.nxp.com/documents/data_sheet/PCF8574.pdf PCF8574] port expanders to ask for button and rotary encoders state. This helps me also to reduce wirings and to make everything more suitable for this small housing. 
    1516