For DIY builders, the classic design is the minimalist “top” schematic. No PNP, no active pull-up. Just:
: A simple passive circuit using a switching diode (like a 1N4148) and a pull-up resistor to combine the lines into one.
Without isolation, ground loops and RF interference from your transmitter can:
Icom Ci V Usb Interface Schematic Top -
For DIY builders, the classic design is the minimalist “top” schematic. No PNP, no active pull-up. Just:
: A simple passive circuit using a switching diode (like a 1N4148) and a pull-up resistor to combine the lines into one. icom ci v usb interface schematic top
Without isolation, ground loops and RF interference from your transmitter can: For DIY builders, the classic design is the