ArduinoでFM送信機を自作！ソフトウェア変調で29MHz帯に挑戦。29MHz帯のナローFM/スーパーナローFMにも対応済み。

This video demonstrates an attempt at FM modulation using only software, without any dedicated circuitry, employing an Arduino and Si5351a microcontroller. By accelerating the ADC, driving the I2C at 800kHz, and directly writing to registers, approximately 9,000 loop operations per second are achieved, complying with the 29MHz band narrow FM/super narrow FM standards. While there's still room for improvement in sound quality, this video showcases the charm of low-cost electronics projects and encourages viewers to conduct further tests and improvements. ---------------------------------------------------------------- ▶ Arduino Download Nano Sketch [Free] https://drive.google.com/file/d/1PHOI... ▶29MHz FM Modulation Prototype Circuit https://drive.google.com/file/d/1OIsz... ▶29MHz FM Modulation Prototype Instruction Manual https://drive.google.com/file/d/1OIsz... ▶29MHz FM Modulation Prototype Instruction Manual m/file/d/1bxYgOkWmdKg9AYhO7X_g5twr82q8H1Ku/view?usp=sharing ▶29MHz FM Modulation Detailed Explanation https://drive.google.com/file/d/1hhdX... ---------------------------------------------------------------- ★I am writing ebooks on amateur radio. Details here 　・Amateur Radio for Beginners: Starting from Scratch https://amzn.to/3RJsJNe 　・Amateur Radio: How to Start for Complete Beginners https://amzn.to/4ugCFLB