Icom Ci V Usb Interface Schematic Top

Connect a wire from the terminal of the jack directly to the RXD pad on the USB module (the same pad where the diode's anode is attached).

A fast-switching diode (like the 1N4148 ) is connected between the TXD and RXD pins. The cathode (striped side) faces the TXD pin. icom ci v usb interface schematic top

Use legitimate FTDI drivers. Counterfeit chips (common on very cheap boards) often fail with official drivers. Connect a wire from the terminal of the

+---------------+ | USB Port | +---------------+ | | v +---------------+ | FTDI Chip | | (FT232RL) | +---------------+ | | v +---------------+ | Voltage | | Regulator | +---------------+ | | v +---------------+ | Interface | | Circuit | +---------------+ | | v +---------------+ | Radio | | Interface | +---------------+ Use legitimate FTDI drivers

Solder the cathode (the side with the black band) of the 1N4148 diode directly to the TXD pin of the USB module.

When the radio transmits data, the signal travels directly into the RXD pin of the USB chip. The diode prevents this voltage from rushing back into the TXD pin.

Type-B USB chassis mount (or tethered cable) and a 3.5mm mono jack. The Master Interface Schematic