Schematic Top | Icom Ci V Usb Interface

For those who prefer discrete builds, a simple two-transistor circuit can shift RS-232 levels (if using a serial-to-USB cable) or module levels to the CI-V bus.

: The standard physical connection for the radio end of the cable. Top Schematics & Design Options CI-V interface - Tučňák Wiki Tucnak - Nagano.cz Easy to make CI-V cable www.maniaradio.it Simple Icom CI-V Interface Yet Another ICOM CI-V Interface circuit | Next Electronics Next.gr Electronics Icom CI-V Interfaces and CT-17 Replacement – VK4AMG icom ci v usb interface schematic top

: It uses an "open collector" bus where the data line is held high when idle. Any device can "talk" by pulling that line low, using a collision detection system similar to early Ethernet. For those who prefer discrete builds, a simple

) handles the USB protocol and provides TTL-level serial signals (TX and RX). Any device can "talk" by pulling that line

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

(anode to RXD/CI-V, cathode to TXD) to prevent the radio from being driven high by the TX pin when idle.