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  1. ╔══════════════════════════════════════════════════════════════════════════════╗
  2. ║ XOR-Schaltung (Antivalenz)                                                   ║
  3. ║ ══════════════════════════                                                   ║
  4. ║ Aufgabe ....... Die Lampe (= x1) soll leuchten, wenn                         ║
  5. ║                    ■ Schalter A geschlossen und Schalter B offen ist, oder   ║
  6. ║                    ■ Schalter A offen und Schalter B geschlossen ist.        ║
  7. ║                                                                              ║
  8. ║ Aufbau ........ Verbindung der Stromquelle mit Schalter A (Kabel a-a).       ║
  9. ║                 Verbindung von Schalter A (Ruhekontakt) mit Schalter B (Ar-  ║
  10. ║                 beitskontakt und Schalter A (Arbeitskontakt) mit Schalter B  ║
  11. ║                 (Ruhekontakt).                                               ║
  12. ║ Lösung ........ Die XOR-Schaltung läßt vier Schaltstellungen zu. Die Lampe   ║
  13. ║                 leuchtet nur dann, wenn die Schalterstellungen verschieden   ║
  14. ║                 sind.                                                        ║
  15. ║                         ┌───────────────────────┐                            ║
  16. ║                         │ A  xor  B  = Ergebnis │                            ║
  17. ║                         ╞═══════════════════════╡                            ║
  18. ║                         │ 0  xor  0  =   0      │                            ║
  19. ║                         │ 0  xor  1  =   1      │                            ║
  20. ║                         │ 1  xor  0  =   1      │                            ║
  21. ║                         │ 1  xor  1  =   0      │                            ║
  22. ║                         └───────────────────────┘                            ║
  23. ╚══════════════════════════════════════════════════════════════════════════════╝
  24.                                                                                 
  25.              Eingabe           Verarbeitung                      Ausgabe        
  26.          Schalter Relais                                                        
  27.  ────────────────────────────────────────────────────────────────────────────── 
  28.                         a   ∙     ∙   ∙     ∙   ∙     ∙   ∙                     
  29.              0/1                                                                
  30.                        a∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙    ∙──┐            
  31.  Schalt.A 1 ═░═══  ∙   c∙─┘ b∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙    d──x1 Lampe     
  32.                        ∙∙─┬─d∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙    ∙──┐            
  33.           2 ═░═══  ∙   b∙─┘ c∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙    ∙──x2           
  34.                        ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙    ∙──┐            
  35.           3 ═░═══  ∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙    ∙──x3           
  36.                        ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙    ∙──┐            
  37.           4 ═░═══  ∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙    ∙──x4           
  38.                        ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙    ∙──┐            
  39.           5 ═░═══  ∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙    ∙──x5           
  40.                        ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙    ∙──┐            
  41.           6 ═░═══  ∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙    ∙──x6           
  42.                        ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙    ∙──┐            
  43.           7 ═░═══  ∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙    ∙──x7           
  44.                        ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙   ∙∙─┬─∙∙    ∙──┐            
  45.           8 ═░═══  ∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙   ∙∙─┘ ∙∙    ∙──x8           
  46.