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这是一个开源硬件项目，复刻并扩展了经典 Stylophone 触控合成器的玩法，完全基于模拟电路实现，没有微控制器，非常适合学习模拟电子与声音合成原理。
核心亮点
项目特性 | 细节说明 |
|---|---|
核心振荡器 | NE555 定时器工作在无稳态多谐振荡器模式，作为主音频信号源 |
触控演奏 | 触控笔接触 PCB 上的按键焊盘，通过电阻网络改变振荡器频率，实现不同音高 |
八度切换 | 通过切换并联电容组改变振荡器的总电容，实现八度升降 |
颤音效果 | 额外 RC 振荡器调制 NE555 的控制电压引脚，产生低频颤音，深度可通过电位器调节 |
音频输出 | LM386 缓冲 + 推挽放大电路，驱动内置扬声器和耳机输出，带音量控制 |
供电方案 | 支持 9V 直流电源（JST 接口 / DC 桶型接口），带防反接保护 |
开源协议 | 基于 CERN-OHL-S v2 开源硬件协议，可自由学习、修改、分享 |
工作原理拆解
音高控制：每个触控按键串联不同阻值的电阻，接触时改变 NE555 的充放电电阻，从而改变振荡频率（音高）。
八度切换：并联电容会降低振荡频率，通过切换电容组实现不同八度的音域扩展。
颤音调制：额外的 RC 电路产生低频信号，调制 NE555 的 5 脚（控制电压端），让输出频率产生周期性波动，形成颤音效果。
放大输出：NE555 的方波信号经过 LM386 缓冲，再通过推挽放大器驱动扬声器，避免负载影响振荡器频率。
项目结构与构建
提供了完整的硬件设计文件（KiCad 工程、Gerber 文件、物料清单 BOM）、组装步骤说明和调试指南。
适合电子爱好者复刻，通过焊接和调试可以直观理解振荡器、RC 电路、音频放大等核心概念。
项目附带演示视频，可听到用它演奏《精灵宝可梦》主题曲《Littleroot Town》的效果。
项目意义
这个项目的初衷是通过动手实践学习模拟电子技术，它用最基础的 NE555 定时器实现了完整的合成器功能，把振荡、调制、放大这些抽象概念变成了可触摸、可听见的声音，非常适合电子入门和 DIY 爱好者参考。
License
CERN-OHL-S v2
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