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  + 1 x opto-coupler 6N138 => 8 pins IC
 
  + 1 x opto-coupler 6N138 => 8 pins IC
 
  + 1 x dioode 1N4148 (D1)
 
  + 1 x dioode 1N4148 (D1)
  + 1 x resistor 1K (R1) => brown-black-red
+
  + 1 x resistor 1K (R1) => brown-black-red (*)
  + 1 x resistor 10K (R2) => brown-black-orange
+
  + 1 x resistor 10K (R2) => brown-black-orange (*)
  + 1 x resistor 220 (R3) => red-red-brown
+
  + 1 x resistor 220 (R3) => red-red-brown (*)
 
  + 1 x MCP23008 => 18 pins IC
 
  + 1 x MCP23008 => 18 pins IC
 
  + 2 x ceramic capacitor 100nF (C1, C2)
 
  + 2 x ceramic capacitor 100nF (C1, C2)

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