Icom Ci V Usb Interface Schematic Top 【Secure · FIX】

This is the most reliable, cleanest, and most popular design for modern ham shacks. It utilizes a dedicated USB-to-TTL breakout board (such as an FTDI FT232RL, CP2102, or CH340G) and a single switching diode to combine the lines. The Schematic Circuit:

The CI-V port is a 3.5mm mono jack that acts as a bidirectional, open-collector bus. TTL (0V to 5V or 3.3V). Wiring: Tip is Data, Sleeve is Ground.

USB-to-UART chip, combined with a single-transistor circuit to manage the half-duplex communication. Basic Schematic Components FTDI FT232RL Board Go to product viewer dialog for this item. (recommended for driver stability) or Diode: Go to product viewer dialog for this item. (switching diode). Resistor: 1kΩ to 4.7kΩ resistor. Connector: 3.5mm Mono Jack. The Schematic Diagram icom ci v usb interface schematic top

Connect the RXD line directly to the Tip of the 3.5mm mono jack.

: A popular design from N5DUX uses the FT232RL chip directly, requiring minimal external components beyond a few capacitors for noise decoupling. This is the most reliable, cleanest, and most

: Modern schematics center around a bridge IC, most commonly the or the Silicon Labs CP2102 Go to product viewer dialog for this item.

Before etching PCB or soldering on a protoboard, verify that your includes: TTL (0V to 5V or 3

Creating a USB interface for the Icom CI-V, a protocol used by Icom radios for computer communication, involves designing a simple interface that converts the CI-V's serial signal to a USB signal that a computer can understand. The CI-V protocol uses a 9-pin D-sub connector with a specific pinout and typically operates at 9600 bps.

4.7kΩ is the industry standard (often noted as 4K7 or 4K7Ω in schematics) [G3VGR]. Output Pin: 3.5mm mono plug (Tip = Data, Sleeve = Ground). 4. Practical Implementation: Building the Interface