Part in the structural drawing  B estell Nr.Conrad 
Electronics  Component  
G 1  40 32 53  1K ohm of 1/4W  
R2  40 31 30  100 ohms of 1/4W  
R3, R6  40 31 72  220 ohms of 1/4W 2x  
R4, r5, r7, r8  40 33 77  10K ohm of 1/4W 4x  
R9  40 32 10  470 ohms of 1/4W  
D1  18 58 09  OP131 (or other suitable infrared LED)  
D2  18 45 43  LED green (transmitting data displays)  
D3  18 47 05  LED red (the receiving of data displays)  
T1, t2, t4, t5, t6  16 31 47  2N2222 (NPN) 5X  
T3  18 68 80  OP485 (or other suitable photo transistor)  
U1A  16 90 64  IC SN 74LS14, Dip, 14Pin - only pin 1 and 2 needs  
   The following components are not necessarily 
necessarily, but with them it is simpler, 
to build a functioning module:  
 60 56 89  Schaltlitze  
 18 95 10  14poliger IC base  
 52 77 69  Experimentation circuit board  
  73 95 10  5polige socket strip for putting on the Motherboard