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DIY USB Cables


Cable Construction

  • The most popular medium for homemade USB cables is unshielded twisted-pair cable (UTP). Used primarily for telephone lines and Ethernet networking, UTP is available in many strand configurations. Telephone wiring often contains two twisted-pairs, and is commonly used to create USB cables. Coiled lengths of telephone handset wire can provide for an adjustable length USB cable. UTP cable intended for Ethernet networks contain eight copper wire strands, and can be used to connect two individual USB devices.

    Solder a USB connector to each end of chosen cable, paying attention to the wire colors attached to each pin. In normal USB cables, the red (pin 1) and black (pin 4) wires carry 5 volts and a common ground. Digital data is passed over the green (pin 3) twisted pair, returning over the striped wire (pin 2). Use the available twisted pairs to conduct each signal, making sure to use the same wiring pattern on both connectors. Completed cables can extend up to 50 feet if properly shielded. Use a multimeter to ensure that all pins have conductivity
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