{"id":75100,"date":"2026-02-11T11:58:09","date_gmt":"2026-02-11T03:58:09","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/75100.html"},"modified":"2026-02-11T11:58:09","modified_gmt":"2026-02-11T03:58:09","slug":"%e4%bb%8e%e8%9c%82%e9%b8%a3%e5%88%b0%e4%ba%a4%e5%93%8d%ef%bc%9a%e6%8e%a2%e7%b4%a2esp32-pwm%e9%9f%b3%e9%a2%91%e7%9a%84%e5%88%9b%e5%ae%a2%e8%89%ba%e6%9c%af%e4%b8%8e%e5%a3%b0%e5%ad%a6%e5%ae%9e%e9%aa%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/75100.html","title":{"rendered":"\u4ece\u8702\u9e23\u5230\u4ea4\u54cd\uff1a\u63a2\u7d22ESP32 PWM\u97f3\u9891\u7684\u521b\u5ba2\u827a\u672f\u4e0e\u58f0\u5b66\u5b9e\u9a8c"},"content":{"rendered":"

\u4ece\u8702\u9e23\u5230\u4ea4\u54cd：\u63a2\u7d22ESP32 PWM\u97f3\u9891\u7684\u521b\u5ba2\u827a\u672f\u4e0e\u58f0\u5b66\u5b9e\u9a8c<\/h2>\n

\u5728\u6570\u5b57\u827a\u672f\u4e0e\u786c\u4ef6\u521b\u5ba2\u7684\u4ea4\u6c47\u5904，\u58f0\u97f3\u6210\u4e3a\u4e86\u4e00\u79cd\u72ec\u7279\u7684\u8868\u8fbe\u5a92\u4ecb\u3002ESP32\u8fd9\u6b3e\u4f4e\u6210\u672c\u3001\u9ad8\u6027\u80fd\u7684\u5fae\u63a7\u5236\u5668，\u901a\u8fc7\u5176PWM（\u8109\u51b2\u5bbd\u5ea6\u8c03\u5236）\u529f\u80fd，\u4e3a\u521b\u4f5c\u8005\u6253\u5f00\u4e86\u5c06\u7535\u5b50\u4fe1\u53f7\u8f6c\u5316\u4e3a\u827a\u672f\u58f0\u666f\u7684\u5927\u95e8\u3002\u65e0\u8bba\u662f\u751f\u6210\u73af\u5883\u97f3\u6548\u3001\u7535\u5b50\u5408\u6210\u97f3\u4e50，\u8fd8\u662f\u6784\u5efa\u4ea4\u4e92\u5f0f\u58f0\u97f3\u88c5\u7f6e，PWM\u97f3\u9891\u6280\u672f\u63d0\u4f9b\u4e86\u4e00\u79cd\u76f4\u63a5\u800c\u5bcc\u6709\u8868\u73b0\u529b\u7684\u65b9\u5f0f，\u8ba9\u521b\u5ba2\u548c\u6559\u80b2\u5de5\u4f5c\u8005\u80fd\u591f\u63a2\u7d22\u58f0\u97f3\u7684\u7269\u7406\u672c\u8d28\u4e0e\u521b\u610f\u53ef\u80fd\u6027\u3002\u672c\u6587\u5c06\u4ee5ESP32\u4e3a\u6838\u5fc3，\u6df1\u5165\u63a2\u8ba8\u5982\u4f55\u901a\u8fc7PWM\u751f\u6210\u548c\u63a7\u5236\u97f3\u9891\u4fe1\u53f7，\u7ed3\u5408MicroPython\u548cArduino\u751f\u6001，\u5b9e\u73b0\u4ece\u57fa\u7840\u8702\u9e23\u5230\u590d\u6742\u58f0\u5b66\u5b9e\u9a8c\u7684\u8de8\u8d8a\u3002\u6211\u4eec\u5c06\u8986\u76d6\u6ce2\u5f62\u5408\u6210\u3001\u5b9e\u65f6\u8c03\u5236\u3001\u786c\u4ef6\u8bbe\u8ba1\u4ee5\u53ca\u5b9e\u9645\u827a\u672f\u9879\u76ee\u4e2d\u7684\u5e94\u7528，\u4e3a\u6280\u672f\u7231\u597d\u8005\u3001\u827a\u672f\u5bb6\u548c\u6559\u80b2\u8005\u63d0\u4f9b\u4e00\u5957\u5b8c\u6574\u7684\u5b9e\u8df5\u6307\u5357\u3002<\/p>\n

1. PWM\u97f3\u9891\u57fa\u7840：\u4ece\u6570\u5b57\u4fe1\u53f7\u5230\u58f0\u97f3\u827a\u672f<\/h3>\n

PWM（\u8109\u51b2\u5bbd\u5ea6\u8c03\u5236）\u662f\u4e00\u79cd\u901a\u8fc7\u8c03\u6574\u6570\u5b57\u8109\u51b2\u7684\u5360\u7a7a\u6bd4\u6765\u6a21\u62df\u6a21\u62df\u4fe1\u53f7\u7684\u6280\u672f\u3002\u5728\u97f3\u9891\u5e94\u7528\u4e2d，ESP32\u7684PWM\u6a21\u5757\u53ef\u4ee5\u751f\u6210\u4e0d\u540c\u9891\u7387\u548c\u5360\u7a7a\u6bd4\u7684\u65b9\u6ce2，\u901a\u8fc7\u7b80\u5355\u7684\u4f4e\u901a\u6ee4\u6ce2\u540e，\u8fd9\u4e9b\u65b9\u6ce2\u80fd\u591f\u8f6c\u6362\u4e3a\u8fde\u7eed\u7684\u6a21\u62df\u97f3\u9891\u4fe1\u53f7\u3002\u5c3d\u7ba1PWM\u97f3\u9891\u5728\u4fdd\u771f\u5ea6\u4e0a\u65e0\u6cd5\u4e0e\u9ad8\u7aefDAC\u5ab2\u7f8e，\u4f46\u5176\u4f4e\u6210\u672c\u548c\u7075\u6d3b\u6027\u4f7f\u5176\u6210\u4e3a\u521b\u5ba2\u9879\u76ee\u3001\u6559\u80b2\u5b9e\u9a8c\u548c\u827a\u672f\u88c5\u7f6e\u7684\u7406\u60f3\u9009\u62e9\u3002<\/p>\n

\u5728ESP32\u4e0a，PWM\u97f3\u9891\u751f\u6210\u4f9d\u8d56\u4e8eLEDC（LED\u63a7\u5236）\u786c\u4ef6\u6a21\u5757，\u8be5\u6a21\u5757\u652f\u6301\u9ad8\u8fbe16\u4f4d\u7684\u5206\u8fa8\u7387\u548c\u591a\u8fbe16\u4e2a\u72ec\u7acb\u901a\u9053\u3002\u6bcf\u4e2a\u901a\u9053\u53ef\u4ee5\u914d\u7f6e\u4e3a\u751f\u6210\u7279\u5b9a\u9891\u7387\u7684\u6ce2\u5f62，\u4f8b\u5982\u6b63\u5f26\u6ce2\u3001\u65b9\u6ce2\u6216\u952f\u9f7f\u6ce2\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u7684MicroPython\u793a\u4f8b，\u6f14\u793a\u5982\u4f55\u521d\u59cb\u5316PWM\u901a\u9053\u5e76\u751f\u6210\u4e00\u4e2a440Hz\u7684\u6807\u51c6\u97f3\u8c03（A4\u97f3\u7b26）：<\/p>\n

from machine import Pin, PWM<\/p>\n

# \u521d\u59cb\u5316PWM\u5bf9\u8c61，\u4f7f\u7528GPIO25\u5f15\u811a，\u9891\u7387440Hz，\u5360\u7a7a\u6bd450%
\npwm = PWM(Pin(25), freq=440, duty_u16=32768)<\/p>\n

# \u6301\u7eed\u64ad\u653e\u97f3\u8c03
\nimport time
\ntime.sleep(2)<\/p>\n

# \u505c\u6b62\u8f93\u51fa
\npwm.duty_u16(0)<\/p>\n

\u8fd9\u4e00\u7b80\u5355\u4ee3\u7801\u6bb5\u63ed\u793a\u4e86PWM\u97f3\u9891\u7684\u6838\u5fc3\u673a\u5236：\u901a\u8fc7\u8c03\u6574\u9891\u7387\u6539\u53d8\u97f3\u9ad8，\u901a\u8fc7\u8c03\u6574\u5360\u7a7a\u6bd4\u5f71\u54cd\u97f3\u8272\u3002\u7136\u800c，\u7eaf\u65b9\u6ce2\u542c\u8d77\u6765\u5c16\u9510\u4e14\u7535\u5b50\u5473\u6d53\u91cd，\u56e0\u6b64\u5728\u5b9e\u9645\u827a\u672f\u9879\u76ee\u4e2d，\u6211\u4eec\u5f80\u5f80\u9700\u8981\u7ed3\u5408\u591a\u79cd\u6ce2\u5f62\u548c\u8c03\u5236\u6280\u672f\u6765\u4e30\u5bcc\u58f0\u97f3\u8868\u73b0\u3002<\/p>\n

\u63d0\u793a：ESP32\u7684PWM\u9891\u7387\u548c\u5206\u8fa8\u7387\u4e4b\u95f4\u5b58\u5728\u6743\u8861\u3002\u8f83\u9ad8\u9891\u7387（\u598244kHz）\u53ef\u5b9e\u73b0\u66f4\u5e73\u6ed1\u7684\u97f3\u9891，\u4f46\u4f1a\u964d\u4f4e\u6709\u6548\u5206\u8fa8\u7387，\u5bfc\u81f4\u97f3\u8d28\u4e0b\u964d\u3002\u5efa\u8bae\u6839\u636e\u76ee\u6807\u5e94\u7528\u5e73\u8861\u8fd9\u4e9b\u53c2\u6570\u3002<\/p>\n

\u5bf9\u4e8e\u521b\u5ba2\u548c\u6559\u80b2\u573a\u666f，\u7406\u89e3PWM\u7684\u7269\u7406\u539f\u7406\u81f3\u5173\u91cd\u8981\u3002\u58f0\u97f3\u7684\u672c\u8d28\u662f\u632f\u52a8，\u800cPWM\u901a\u8fc7\u5feb\u901f\u5207\u6362\u9ad8\u4f4e\u7535\u5e73\u6765\u6a21\u62df\u8fd9\u79cd\u632f\u52a8\u3002\u5f53\u4fe1\u53f7\u901a\u8fc7\u4f4e\u901a\u6ee4\u6ce2\u5668（\u5982\u4e00\u4e2a\u7b80\u5355\u7684RC\u7535\u8def）\u65f6，\u9ad8\u9891\u6210\u5206\u88ab\u6ee4\u9664，\u7559\u4e0b\u53ef\u542c\u7684\u97f3\u9891\u9891\u7387\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5178\u578b\u7684\u6ee4\u6ce2\u7535\u8def\u8bbe\u8ba1，\u7528\u4e8e\u5c06PWM\u8f93\u51fa\u8f6c\u6362\u4e3a\u6a21\u62df\u97f3\u9891\u4fe1\u53f7：<\/p>\n\n\u7ec4\u4ef6\u53c2\u6570\u4f5c\u7528\u63cf\u8ff0<\/tr>\n\n\n\n\n
\u7535\u963b<\/td>\n1k\u03a9<\/td>\n\u9650\u5236\u7535\u6d41，\u4e0e\u7535\u5bb9\u6784\u6210\u6ee4\u6ce2\u5e38\u6570<\/td>\n<\/tr>\n
\u7535\u5bb9<\/td>\n0.1\u03bcF<\/td>\n\u6ee4\u9664\u9ad8\u9891\u566a\u58f0，\u5e73\u6ed1\u4fe1\u53f7<\/td>\n<\/tr>\n
\u8fde\u63a5\u65b9\u5f0f<\/td>\n\u4e32\u8054\u7535\u963b\u540e\u63a5\u5730<\/td>\n\u5f62\u6210\u4e00\u9636\u4f4e\u901a\u6ee4\u6ce2\u5668<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd9\u79cd\u57fa\u7840\u786c\u4ef6\u8bbe\u8ba1\u662f\u5927\u591a\u6570ESP32\u97f3\u9891\u9879\u76ee\u7684\u8d77\u70b9，\u4f46\u5b83\u4ec5\u4ec5\u63ed\u5f00\u4e86\u58f0\u97f3\u521b\u4f5c\u5e8f\u5e55\u7684\u4e00\u89d2\u3002<\/p>\n

2. \u6ce2\u5f62\u5408\u6210\u4e0e\u8c03\u5236\u6280\u672f<\/h3>\n

\u5728\u97f3\u9891\u5408\u6210\u4e2d，\u6ce2\u5f62\u51b3\u5b9a\u4e86\u58f0\u97f3\u7684\u57fa\u672c\u7279\u5f81\u3002ESP32\u7684PWM\u53ef\u4ee5\u751f\u6210\u591a\u79cd\u6807\u51c6\u6ce2\u5f62，\u6bcf\u79cd\u90fd\u6709\u5176\u72ec\u7279\u7684\u58f0\u5b66\u7279\u6027\u3002\u65b9\u6ce2\u5bcc\u542b\u5947\u6b21\u8c10\u6ce2，\u58f0\u97f3\u5c16\u9510\u4e14\u5bcc\u6709\u653b\u51fb\u6027，\u9002\u5408\u7535\u5b50\u4e50\u6548\u679c；\u6b63\u5f26\u6ce2\u7eaf\u51c0\u4f46\u7565\u663e\u5355\u8c03，\u9002\u5408\u6a21\u62df\u81ea\u7136\u97f3\u8c03；\u952f\u9f7f\u6ce2\u5305\u542b\u4e30\u5bcc\u8c10\u6ce2，\u542c\u8d77\u6765\u9971\u6ee1\u800c\u9002\u5408\u94fa\u57ab\u97f3\u666f\u3002\u901a\u8fc7\u7ec4\u5408\u8fd9\u4e9b\u6ce2\u5f62，\u521b\u4f5c\u8005\u53ef\u4ee5\u8bbe\u8ba1\u51fa\u4ece\u53e4\u5178\u4e50\u5668\u6a21\u62df\u5230\u672a\u6765\u6d3e\u97f3\u6548\u7684\u5e7f\u6cdb\u58f0\u97f3\u3002<\/p>\n

MicroPython\u63d0\u4f9b\u4e86\u7075\u6d3b\u7684\u6ce2\u5f62\u751f\u6210\u65b9\u5f0f\u3002\u4ee5\u4e0b\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u52a8\u6001\u6539\u53d8PWM\u53c2\u6570\u6765\u6a21\u62df\u4e00\u4e2a\u7b80\u5355\u7684\u952f\u9f7f\u6ce2\u4e0a\u5347\u6548\u679c：<\/p>\n

import math
\nfrom machine import Pin, PWM
\nimport time<\/p>\n

pwm = PWM(Pin(25), freq=440, duty_u16=0)<\/p>\n

# \u751f\u6210\u952f\u9f7f\u6ce2：\u9891\u7387\u7ebf\u6027\u4e0a\u5347
\nfor freq in range(100, 1000, 10):
\n pwm.freq(freq)
\n pwm.duty_u16(32768) # 50%\u5360\u7a7a\u6bd4
\n time.sleep(0.01)<\/p>\n

pwm.duty_u16(0) # \u7ed3\u675f\u64ad\u653e<\/p>\n

\u66f4\u9ad8\u7ea7\u7684\u8c03\u5236\u6280\u672f\u5982\u632f\u5e45\u8c03\u5236（AM）\u3001\u9891\u7387\u8c03\u5236（FM）\u548c\u73af\u5f62\u8c03\u5236（Ring Modulation）\u53ef\u4ee5\u8fdb\u4e00\u6b65\u6269\u5c55\u58f0\u97f3\u7684\u521b\u610f\u53ef\u80fd\u6027\u3002\u4f8b\u5982，\u901a\u8fc7\u5c06\u4e00\u4e2a\u4f4e\u9891\u632f\u8361\u5668（LFO）\u5e94\u7528\u5230PWM\u5360\u7a7a\u6bd4\u4e0a，\u53ef\u4ee5\u521b\u5efa\u98a4\u97f3\u6548\u679c；\u800c\u901a\u8fc7\u9891\u7387\u8c03\u5236，\u5219\u53ef\u4ee5\u751f\u6210\u7c7b\u4f3c\u949f\u58f0\u6216\u91d1\u5c5e\u611f\u7684\u590d\u6742\u97f3\u8272\u3002<\/p>\n

\u5728\u5b9e\u9645\u827a\u672f\u88c5\u7f6e\u4e2d，\u8fd9\u4e9b\u6280\u672f\u5e38\u5e38\u88ab\u7ed3\u5408\u8d77\u6765\u4f7f\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684FM\u5408\u6210\u793a\u4f8b，\u7528MicroPython\u5b9e\u73b0，\u901a\u8fc7\u4e24\u4e2aPWM\u901a\u9053\u76f8\u4e92\u8c03\u5236\u521b\u5efa\u4e30\u5bcc\u8c10\u6ce2：<\/p>\n

# FM\u5408\u6210\u793a\u4f8b：\u8f7d\u6ce2\u9891\u7387\u88ab\u8c03\u5236\u6ce2\u5f71\u54cd
\ncarrier = PWM(Pin(25), freq=440)
\nmodulator = PWM(Pin(26), freq=2) # \u4f4e\u9891\u8c03\u5236<\/p>\n

# \u52a8\u6001\u8c03\u6574\u8f7d\u6ce2\u9891\u7387 based on modulator's duty cycle
\nfor i in range(500):
\n mod_value = i % 256 # \u6a21\u62df\u8c03\u5236\u4fe1\u53f7\u53d8\u5316
\n modulator.duty_u16(mod_value * 256)
\n new_freq = 440 + (mod_value \/ 255) * 100 # \u9891\u7387\u504f\u79fb\u8303\u56f4
\n carrier.freq(int(new_freq))
\n time.sleep(0.01)<\/p>\n

\u8fd9\u79cd\u52a8\u6001\u8c03\u5236\u80fd\u529b\u4f7f\u5f97ESP32\u4e0d\u4ec5\u4ec5\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u97f3\u8c03\u53d1\u751f\u5668，\u800c\u6210\u4e3a\u4e00\u4e2a\u5b8c\u6574\u7684\u58f0\u5b66\u5b9e\u9a8c\u5e73\u53f0\u3002\u521b\u4f5c\u8005\u53ef\u4ee5\u901a\u8fc7\u811a\u672c\u5b9e\u65f6\u8c03\u6574\u53c2\u6570，\u54cd\u5e94\u4f20\u611f\u5668\u8f93\u5165\u6216\u7528\u6237\u4ea4\u4e92，\u521b\u9020\u51fa\u4e0d\u65ad\u6f14\u53d8\u7684\u58f0\u97f3\u666f\u89c2\u3002<\/p>\n

3. \u4ea4\u4e92\u5f0f\u58f0\u97f3\u88c5\u7f6e\u4e0e\u4e50\u5668\u8bbe\u8ba1<\/h3>\n

\u5c06PWM\u97f3\u9891\u4e0e\u7269\u7406\u4ea4\u4e92\u7ed3\u5408，\u662f\u521b\u5ba2\u827a\u672f\u4e2d\u6700\u4ee4\u4eba\u5174\u594b\u7684\u9886\u57df\u4e4b\u4e00\u3002ESP32\u7684\u591a\u529f\u80fdGPIO\u548c\u901a\u4fe1\u63a5\u53e3（\u5982I2C\u3001SPI\u548c\u89e6\u6478\u4f20\u611f\u5668）\u4f7f\u5176\u80fd\u591f\u8f7b\u677e\u96c6\u6210\u5404\u79cd\u8f93\u5165\u8bbe\u5907，\u4ece\u7b80\u5355\u7684\u6309\u94ae\u548c\u7535\u4f4d\u5668\u5230\u590d\u6742\u7684\u4f20\u611f\u5668\u7f51\u7edc\u3002\u901a\u8fc7\u5c06\u8fd9\u4e9b\u8f93\u5165\u6620\u5c04\u5230\u97f3\u9891\u53c2\u6570，\u6211\u4eec\u53ef\u4ee5\u6784\u5efa\u4ea4\u4e92\u5f0f\u4e50\u5668\u6216\u58f0\u97f3\u96d5\u5851\u3002<\/p>\n

\u4e00\u4e2a\u5178\u578b\u7684\u4f8b\u5b50\u662f\u4f7f\u7528\u7535\u5bb9\u89e6\u6478\u4f20\u611f\u5668\u63a7\u5236\u97f3\u9ad8\u548c\u97f3\u91cf\u3002\u4ee5\u4e0bArduino\u4ee3\u7801\u7247\u6bb5\u5c55\u793a\u4e86\u5982\u4f55\u7528ESP32\u7684\u89e6\u6478\u5f15\u811a\u8bfb\u53d6\u89e6\u6478\u5f3a\u5ea6，\u5e76\u5b9e\u65f6\u8c03\u6574PWM\u8f93\u51fa：<\/p>\n

#include <ESP32Tone.h><\/p>\n

const int touchPin = T0; \/\/ GPIO4（ESP32\u7684\u89e6\u6478\u5f15\u811a0）
\nconst int pwmPin = 25;<\/p>\n

void setup() {
\n Serial.begin(115200);
\n ledcSetup(0, 440, 12); \/\/ 12\u4f4d\u5206\u8fa8\u7387\u63d0\u4f9b\u66f4\u5e73\u6ed1\u7684\u97f3\u9ad8\u53d8\u5316
\n ledcAttachPin(pwmPin, 0);
\n}<\/p>\n

void loop() {
\n int touchValue = touchRead(touchPin);
\n int frequency = map(touchValue, 20, 70, 100, 1000); \/\/ \u5c06\u89e6\u6478\u5f3a\u5ea6\u6620\u5c04\u5230\u9891\u7387\u8303\u56f4<\/p>\n

ledcWriteTone(0, frequency);
\n delay(10);
\n}<\/p>\n

\u8fd9\u79cd\u7b80\u5355\u6620\u5c04\u53ef\u4ee5\u6269\u5c55\u4e3a\u66f4\u590d\u6742\u7684\u4ea4\u4e92\u7cfb\u7edf\u3002\u4f8b\u5982，\u7ed3\u5408\u591a\u4e2a\u89e6\u6478\u4f20\u611f\u5668，\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u591a\u97f3\u9636\u7684\u7535\u5b50\u7434；\u6dfb\u52a0\u52a0\u901f\u5ea6\u8ba1\u53ef\u4ee5\u5b9e\u73b0\u57fa\u4e8e\u624b\u52bf\u7684\u97f3\u6548\u63a7\u5236；\u800c\u4f7f\u7528\u5149\u654f\u7535\u963b\u5219\u53ef\u4ee5\u8ba9\u58f0\u97f3\u54cd\u5e94\u73af\u5883\u5149\u7167\u53d8\u5316\u3002<\/p>\n

\u5728\u827a\u672f\u88c5\u7f6e\u8bbe\u8ba1\u4e2d，PWM\u97f3\u9891\u5e38\u5e38\u4e0e\u89c6\u89c9\u5143\u7d20\u7ed3\u5408，\u521b\u9020\u591a\u611f\u5b98\u4f53\u9a8c\u3002\u4ee5\u4e0b\u8868\u683c\u5217\u4e3e\u4e86\u51e0\u79cd\u5e38\u89c1\u4ea4\u4e92\u6a21\u5f0f\u53ca\u5176\u58f0\u5b66\u5b9e\u73b0\u65b9\u5f0f：<\/p>\n\n\u4ea4\u4e92\u65b9\u5f0f\u4f20\u611f\u5668\u7c7b\u578b\u97f3\u9891\u53c2\u6570\u6620\u5c04\u827a\u672f\u5e94\u7528\u793a\u4f8b<\/tr>\n\n\n\n\n\n
\u89e6\u6478\u5f3a\u5ea6<\/td>\n\u7535\u5bb9\u89e6\u6478<\/td>\n\u97f3\u9ad8\u6216\u97f3\u91cf<\/td>\n\u4ea4\u4e92\u5f0f\u97f3\u5899<\/td>\n<\/tr>\n
\u7269\u7406\u65cb\u8f6c<\/td>\n\u65cb\u8f6c\u7f16\u7801\u5668<\/td>\n\u6ce2\u5f62\u9009\u62e9\u6216\u6ee4\u6ce2\u5f3a\u5ea6<\/td>\n\u58f0\u97f3\u8c03\u5236\u96d5\u5851<\/td>\n<\/tr>\n
\u8ddd\u79bb\u611f\u77e5<\/td>\n\u8d85\u58f0\u6ce2\u4f20\u611f\u5668<\/td>\n\u548c\u58f0\u7ed3\u6784<\/td>\n\u63a5\u8fd1\u6fc0\u6d3b\u7684\u58f0\u97f3\u73af\u5883<\/td>\n<\/tr>\n
\u8fd0\u52a8\u68c0\u6d4b<\/td>\n\u52a0\u901f\u5ea6\u8ba1\/\u9640\u87ba\u4eea<\/td>\n\u97f3\u6548\u89e6\u53d1\u6216panning\u6548\u679c<\/td>\n\u821e\u8e48\u54cd\u5e94\u4e50\u5668<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u8fd9\u4e9b\u4ea4\u4e92\u6a21\u5f0f\u4e0d\u4ec5\u6280\u672f\u4e0a\u6709\u8da3，\u66f4\u91cd\u8981\u7684\u662f\u5b83\u4eec\u964d\u4f4e\u4e86\u58f0\u97f3\u521b\u4f5c\u7684\u95e8\u69db，\u8ba9\u89c2\u4f17\u6216\u5b66\u751f\u80fd\u591f\u901a\u8fc7\u76f4\u89c2\u7684\u7269\u7406\u4e92\u52a8\u63a2\u7d22\u58f0\u5b66\u539f\u7406\u548c\u97f3\u4e50\u521b\u4f5c\u3002<\/p>\n

4. \u4ece\u5b9e\u9a8c\u5230\u5b9e\u8df5：\u5b8c\u6574\u9879\u76ee\u8bbe\u8ba1\u4e0e\u5b9e\u73b0<\/h3>\n

\u5c06PWM\u97f3\u9891\u6280\u672f\u8f6c\u5316\u4e3a\u5b9e\u9645\u827a\u672f\u9879\u76ee\u6216\u6559\u5b66\u5b9e\u9a8c\u9700\u8981\u7cfb\u7edf\u6027\u7684\u8bbe\u8ba1\u601d\u7ef4\u3002\u4e00\u4e2a\u6210\u529f\u7684ESP32\u58f0\u97f3\u9879\u76ee\u901a\u5e38\u5305\u542b\u786c\u4ef6\u8bbe\u8ba1\u3001\u8f6f\u4ef6\u67b6\u6784\u548c\u58f0\u5b66\u8c03\u4f18\u4e09\u4e2a\u6838\u5fc3\u7ec4\u6210\u90e8\u5206\u3002<\/p>\n

\u5728\u786c\u4ef6\u65b9\u9762，\u9664\u4e86\u57fa\u7840\u7684RC\u6ee4\u6ce2\u7535\u8def\u5916，\u901a\u5e38\u9700\u8981\u8003\u8651\u529f\u7387\u653e\u5927\u95ee\u9898\u3002ESP32\u7684GPIO\u5f15\u811a\u53ea\u80fd\u63d0\u4f9b\u6709\u9650\u7535\u6d41（\u901a\u5e38\u7ea640mA），\u76f4\u63a5\u9a71\u52a8\u626c\u58f0\u5668\u4f1a\u5bfc\u81f4\u97f3\u91cf\u5fae\u5f31\u4e14\u53ef\u80fd\u635f\u574f\u82af\u7247\u3002\u89e3\u51b3\u65b9\u6848\u662f\u4f7f\u7528\u7b80\u5355\u7684\u97f3\u9891\u653e\u5927\u5668\u6a21\u5757，\u5982\u57fa\u4e8eLM386\u7684\u7535\u8def，\u6216\u8005\u4f7f\u7528MOSFET\u6676\u4f53\u7ba1\u8fdb\u884c\u7535\u6d41\u653e\u5927\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5178\u578b\u7684\u653e\u5927\u5668\u8fde\u63a5\u65b9\u5f0f：<\/p>\n

  • ESP32 PWM\u8f93\u51fa \u2192 RC\u4f4e\u901a\u6ee4\u6ce2\u5668 \u2192 \u653e\u5927\u5668\u8f93\u5165<\/li>\n
  • \u653e\u5927\u5668\u8f93\u51fa \u2192 \u626c\u58f0\u5668（4-8\u03a9）<\/li>\n
  • \u72ec\u7acb\u7535\u6e90\u4e3a\u653e\u5927\u5668\u4f9b\u7535（\u59825V\u7535\u6e90）<\/li>\n

    \u8f6f\u4ef6\u67b6\u6784\u5219\u9700\u8981\u8003\u8651\u5b9e\u65f6\u6027\u548c\u7075\u6d3b\u6027\u3002\u5bf9\u4e8e\u590d\u6742\u97f3\u9891\u9879\u76ee，\u5efa\u8bae\u4f7f\u7528FreeRTOS（ESP32\u5185\u7f6e\u7684\u5b9e\u65f6\u64cd\u4f5c\u7cfb\u7edf）\u521b\u5efa\u72ec\u7acb\u4efb\u52a1\u5904\u7406\u97f3\u9891\u751f\u6210\u548c\u7528\u6237\u4ea4\u4e92\u3002\u4ee5\u4e0bMicroPython\u4ee3\u7801\u6846\u67b6\u5c55\u793a\u4e86\u5982\u4f55\u7ec4\u7ec7\u4e00\u4e2a\u591a\u4efb\u52a1\u97f3\u9891\u5e94\u7528：<\/p>\n

    import _thread
    \nfrom machine import PWM, Pin
    \nimport time<\/p>\n

    # \u97f3\u9891\u751f\u6210\u4efb\u52a1
    \ndef audio_task():
    \n pwm = PWM(Pin(25), freq=440)
    \n while True:
    \n # \u751f\u6210\u97f3\u9891\u903b\u8f91
    \n pwm.freq(calculate_frequency())
    \n pwm.duty_u16(calculate_duty())
    \n time.sleep(0.01)<\/p>\n

    # \u7528\u6237\u4ea4\u4e92\u4efb\u52a1
    \ndef interaction_task():
    \n while True:
    \n # \u8bfb\u53d6\u4f20\u611f\u5668\u6570\u636e
    \n sensor_value = read_sensor()
    \n update_parameters(sensor_value)
    \n time.sleep(0.05)<\/p>\n

    # \u542f\u52a8\u4efb\u52a1
    \n_thread.start_new_thread(audio_task, ())
    \ninteraction_task() # \u4e3b\u7ebf\u7a0b\u8fd0\u884c\u4ea4\u4e92\u4efb\u52a1<\/p>\n

    \u58f0\u5b66\u8c03\u4f18\u662f\u9879\u76ee\u6210\u529f\u7684\u5173\u952e\u73af\u8282\u3002PWM\u97f3\u9891\u5f80\u5f80\u9700\u8981\u7cbe\u7ec6\u8c03\u6574\u624d\u80fd\u83b7\u5f97\u4ee4\u4eba\u6ee1\u610f\u7684\u97f3\u8d28\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5b9e\u7528\u6280\u5de7：<\/p>\n

      \n
    • \u6297\u952f\u9f7f\u5904\u7406：\u5728\u9891\u7387\u5feb\u901f\u53d8\u5316\u65f6\u6dfb\u52a0\u77ed\u6682\u7684\u6de1\u5165\u6de1\u51fa，\u907f\u514d\u5494\u55d2\u58f0<\/li>\n
    • \u52a8\u6001\u8303\u56f4\u538b\u7f29：\u901a\u8fc7\u8f6f\u4ef6\u9650\u5236\u97f3\u91cf\u5cf0\u503c，\u9632\u6b62\u653e\u5927\u5668\u8fc7\u8f7d<\/li>\n
    • \u8c10\u632f\u6ee4\u6ce2：\u5728\u4ee3\u7801\u4e2d\u6a21\u62df\u6a21\u62df\u6ee4\u6ce2\u5668\u7684\u6548\u679c，\u589e\u5f3a\u7279\u5b9a\u9891\u7387\u6210\u5206<\/li>\n<\/ul>\n

      \u6700\u7ec8，\u8fd9\u4e9b\u6280\u672f\u8981\u7d20\u9700\u8981\u670d\u52a1\u4e8e\u827a\u672f\u8868\u8fbe\u6216\u6559\u80b2\u76ee\u6807\u3002\u65e0\u8bba\u662f\u521b\u5efa\u4e00\u4e2a\u73af\u5883\u58f0\u666f\u88c5\u7f6e\u3001\u4e00\u4e2a\u4ea4\u4e92\u5f0f\u97f3\u4e50\u4e50\u5668，\u8fd8\u662f\u4e00\u4e2a\u58f0\u5b66\u6559\u5b66\u5de5\u5177，ESP32 PWM\u97f3\u9891\u63d0\u4f9b\u4e86\u4e00\u79cd accessible yet \u5f3a\u5927\u7684\u6280\u672f\u57fa\u7840\u3002\u901a\u8fc7\u7ed3\u5408\u521b\u5ba2\u6587\u5316\u7684DIY\u7cbe\u795e\u548c\u58f0\u5b66\u827a\u672f\u7684\u8868\u8fbe\u9700\u6c42，\u6211\u4eec\u53ef\u4ee5\u5c06\u7b80\u5355\u7684\u8702\u9e23\u8f6c\u53d8\u4e3a\u4e30\u5bcc\u7684\u4ea4\u54cd，\u63a2\u7d22\u6570\u5b57\u4e0e\u6a21\u62df\u3001\u6280\u672f\u4e0e\u827a\u672f\u7684\u65e0\u9650\u53ef\u80fd\u3002<\/p>\n

      \u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d，\u6211\u53d1\u73b0\u6700\u4ee4\u4eba\u6ee1\u610f\u7684\u9879\u76ee\u5f80\u5f80\u662f\u90a3\u4e9b\u5e73\u8861\u6280\u672f\u590d\u6742\u6027\u548c\u7528\u6237\u4f53\u9a8c\u7684\u8bbe\u8ba1\u3002\u8fc7\u4e8e\u590d\u6742\u7684\u97f3\u9891\u7b97\u6cd5\u53ef\u80fd\u8ba9\u53c2\u4e0e\u8005\u611f\u5230\u758f\u8fdc，\u800c\u8fc7\u4e8e\u7b80\u5355\u7684\u58f0\u6548\u53c8\u96be\u4ee5\u7ef4\u6301\u5174\u8da3\u3002\u6700\u4f73\u5b9e\u8df5\u662f\u4ece\u7b80\u5355\u4f46\u6709\u6548\u7684\u4ea4\u4e92\u5f00\u59cb，\u9010\u6b65\u589e\u52a0\u5c42\u6b21\u590d\u6742\u6027，\u8ba9\u6280\u672f\u548c\u827a\u672f\u5171\u540c\u6f14\u8fdb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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