A very specific topic!
Connect from the FT232RL to the cathode (Pin 3) of IC 2 .
The heart of the circuit is a USB serial chip. The or the CH340G are the best choices. They are cheap, highly reliable, and feature excellent driver support across Windows, macOS, and Linux. This chip converts the USB signal into standard 5V TX and RX lines. 2. The Single-Wire Combining Circuit icom ci v usb interface schematic top
Serial (UART), typically 9600-19200 baud, 8 data bits, 1 stop bit, no parity. Voltage Levels: TTL (0V to 5V or 3.3V).
Would you like a , PCB layout example , or a specific IC’s connection diagram (e.g., FT232RL + 2N7000)? A very specific topic
Below is a basic overview of how to create a USB interface for Icom devices using an FTDI chip, which is a popular choice for USB to serial conversions. This example assumes you are familiar with basic electronics and soldering.
Integrating vintage or modern Icom transceivers with computer-based logging software, digital mode suites, or rig control applications requires a CI-V (Computer Interface Five) adapter. Modern computers lack legacy serial ports, making a USB-to-CI-V interface essential. The or the CH340G are the best choices
While a bit older, this is great if you already have a USB-to-RS232 adapter and want to convert it to CI-V. It provides robust electrical characteristics [G3VGR]. 3. Schematic Top: Essential Design Elements
Combine the separate TX and RX lines into a single, bi-directional 3.5mm mono line without causing data collisions. The Core Schematic Components
The simplest way to interface a standard USB-to-TTL module (which has separate TX and RX pins) with the single-wire CI-V bus is to bridge the signals.
A 3.5mm mono plug connects to the radio's "REMOTE" jack; the tip is data, and the sleeve is ground. Transistor-Based Level Shifter