Simplified 2550

This design is the same as the traditionnal design without SMD resistor on input/output.
Be careful to add resistors of appropriate value to protect outputs again damages.


BOARD



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BILL OF MATERIALS

1      18F2550 I/SP
1      USB connector type B
1      XTAL 20 Mhz
2      22 pF            
1      47 μF                 
1      220 nF
1      100 nF
2      470 ohms resistor
1      10k resistor
1      CI support 28 pin
4      pin header 2.54 mm
2      jumper
2      switch
1      Terminal block 2 positions
1      5V Regulator
2      Green led



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