Important notes

• You definitely need BSV52 transistors and 4.7 kOhm resistors for this cable, different parts may make the cable inoperable.

• On circuit diagrams, plugs are displayed as viewed from the back side, the solder side. Chips are displayed as viewed from above; also, see the small semicircular cut for finding the correct orientation. When in doubt, see the corresponding description on the legend page.

Construction

You need the following parts to build this cable:

• One solderable 6-pin male DIN plug (Commodore serial plug)

• One solderable 25-pin male plug (PC parallel plug)

• Four BSV52 transistors

• Four SMD 1206-style 4.7 kOhm resistors

• A shielded 4-wire or unshielded 5-wire cable of, preferably, at most 2 meters

Step 1. Solder one end of the cable onto the DIN plug.

Step 2. Solder those wires, that don't go through an amplifier, on the other end of the cable onto the parallel plug. These include the following connections:

   DIN plug   
 Parallel plug 

    2, GND     
18-25, GND     

    3, ATN     
   13, Select  

    4, CLK     
   12, PaperEnd

    5, DATA    
   10, Ack     

    6, RESET   
   11, Busy    

Step 3. Build the amplifier bridges, consisting of one transistor and one resistor each, between the appropriate pins of the parallel plug. These include the following connections:

 Parallel plug 
 Parallel plug 

   13, Select  
    1, Strobe  

   12, PaperEnd
   14, AutoFeed

   11, Busy    
   17, SelectIn

   10, Ack     
   16, Init    

The collector of each transistor should be pointing towards the pin in the left column of the table. The base of each transistor should be connected to one side of the resistor; the other side of each resistor should be connected to the pin in the right column of the table. The emitters of the transistors should be connected together to the common ground, the GND line.

Circuit diagram

You can find the description of all parts used on the diagrams at the legend page.

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