Top: Icom Ci V Usb Interface Schematic

If you hear noise, you may need an optically isolated interface (like XGGCOMMS) to separate the PC ground from the radio ground. Conclusion

Connect TX to RX through a (1N4148) with the cathode toward the TX pin.

Powers the computer side of the circuit and the input side of the optocouplers. icom ci v usb interface schematic top

: It uses a standard asynchronous serial format (NRZ).

Before building the hardware, it is critical to understand how the Icom CI-V protocol operates at a physical level. If you hear noise, you may need an

Therefore, your interface must perform two key functions:

The radio acts as both a sound card and a serial COM port. : It uses a standard asynchronous serial format (NRZ)

Have questions about a specific component or layout? Join the r/amateurradio subreddit or the Icom CI-V discussion group on Groups.io – many experienced builders share their top-side PCB views and modifications.