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   45,
   786,
   "级联在 U22 之后：U22.QH'(9) -> U33.SER(14)，网络名 SR_CAS2。整条链变成 24 位，",
   0,
   10
  ],
  [
   45,
   770,
   "先移入的字节落到 U33。SRCLK / RCLK / OE# 与前两片共用。",
   0,
   10
  ],
  [
   45,
   754,
   "QA~QE = EDL_EN1~5；QF/QG/QH 备用不接。",
   0,
   10
  ],
  [
   45,
   738,
   "100k 下拉不放在这里 —— 跟按键 MOS 栅极一样，放在载板上紧挨模拟开关（§8.1 复位安全）。",
   0,
   10
  ],
  [
   540,
   806,
   "【B】风扇：低边 N-MOS + PWM，5 个风扇并一路（§22.6）",
   0,
   12
  ],
  [
   540,
   786,
   "Q6 AO3400A 切风扇回流，D2 SS34 做续流 —— 风扇是感性负载，少了它 MOS 会被反峰打穿。",
   0,
   10
  ],
  [
   540,
   770,
   "FAN_PWM = IO47，FAN_TACH = IO48。5 个 TACH 并联做线或，停一个频率掉约 1/5。",
   0,
   10
  ],
  [
   540,
   754,
   "TACH 必须分压：低边 PWM 关断时风扇地被抬到 12V，TACH 集电极开路也跟着到 12V。",
   0,
   10
  ],
  [
   540,
   738,
   "10k 上拉到 12V + 10k/3.3k 分压 -> IO48 最高 2.98V。关断期间读到稳定高电平（测不到转速），",
   0,
   10
  ],
  [
   540,
   722,
   "导通期间才有脉冲 —— 这是低边调速的固有限制，不是接线错。",
   0,
   10
  ],
  [
   45,
   175,
   "风扇电流 4x0.10 + 1x0.30 = 0.70A @12V；12V 输入预算 7.6 -> 8.3A，10A 适配器仍有余量。",
   0,
   10
  ],
  [
   45,
   155,
   "风扇座 KF2510-3A：pin1 = +12V，pin2 = 风扇回流（MOS 漏极），pin3 = TACH。",
   0,
   10
  ],
  [
   45,
   806,
   "【A】第三片 74HC595（U33）—— 5 路 EDL_EN",
   0,
   12
  ],
  [
   45,
   786,
   "级联在 U22 之后：U22.QH'(9) -> U33.SER(14)，网络名 SR_CAS2。整条链变成 24 位，",
   0,
   10
  ],
  [
   45,
   770,
   "先移入的字节落到 U33。SRCLK / RCLK / OE# 与前两片共用。",
   0,
   10
  ],
  [
   45,
   754,
   "QA~QE = EDL_EN1~5；QF/QG/QH 备用不接。",
   0,
   10
  ],
  [
   45,
   738,
   "100k 下拉不放在这里 —— 跟按键 MOS 栅极一样，放在载板上紧挨模拟开关（§8.1 复位安全）。",
   0,
   10
  ],
  [
   540,
   806,
   "【B】风扇：低边 N-MOS + PWM，5 个风扇并一路（§22.6）",
   0,
   12
  ],
  [
   540,
   786,
   "Q6 AO3400A 切风扇回流，D2 SS34 做续流 —— 风扇是感性负载，少了它 MOS 会被反峰打穿。",
   0,
   10
  ],
  [
   540,
   770,
   "FAN_PWM = IO47，FAN_TACH = IO48。5 个 TACH 并联做线或，停一个频率掉约 1/5。",
   0,
   10
  ],
  [
   540,
   754,
   "TACH 必须分压：低边 PWM 关断时风扇地被抬到 12V，TACH 集电极开路也跟着到 12V。",
   0,
   10
  ],
  [
   540,
   738,
   "10k 上拉到 12V + 10k/3.3k 分压 -> IO48 最高 2.98V。关断期间读到稳定高电平（测不到转速），",
   0,
   10
  ],
  [
   540,
   722,
   "导通期间才有脉冲 —— 这是低边调速的固有限制，不是接线错。",
   0,
   10
  ],
  [
   45,
   175,
   "风扇电流 4x0.10 + 1x0.30 = 0.70A @12V；12V 输入预算 7.6 -> 8.3A，10A 适配器仍有余量。",
   0,
   10
  ],
  [
   45,
   155,
   "风扇座 KF2510-3A：pin1 = +12V，pin2 = 风扇回流（MOS 漏极），pin3 = TACH。",
   0,
   10
  ],
  [
   45,
   806,
   "【A】第三片 74HC595（U33）—— 5 路 EDL_EN",
   0,
   12
  ],
  [
   45,
   786,
   "级联在 U22 之后：U22.QH'(9) -> U33.SER(14)，网络名 SR_CAS2。整条链变成 24 位，",
   0,
   10
  ],
  [
   45,
   770,
   "先移入的字节落到 U33。SRCLK / RCLK / OE# 与前两片共用。",
   0,
   10
  ],
  [
   45,
   754,
   "QA~QE = EDL_EN1~5；QF/QG/QH 备用不接。",
   0,
   10
  ],
  [
   45,
   738,
   "100k 下拉不放在这里 —— 跟按键 MOS 栅极一样，放在载板上紧挨模拟开关（§8.1 复位安全）。",
   0,
   10
  ],
  [
   45,
   520,
   "【B】风扇：低边 N-MOS + PWM，5 个风扇并一路（§22.6）",
   0,
   12
  ],
  [
   45,
   500,
   "Q6 AO3400A 切风扇回流，D2 SS34 做续流 —— 风扇是感性负载，",
   0,
   10
  ],
  [
   45,
   484,
   "少了它 MOS 会被反峰打穿。FAN_PWM = IO47，FAN_TACH = IO48。",
   0,
   10
  ],
  [
   45,
   468,
   "5 个 TACH 并联做线或，停一个频率掉约 1/5（分不出是哪一个）。",
   0,
   10
  ],
  [
   45,
   444,
   "TACH 必须分压：低边 PWM 关断时风扇地被抬到 12V，",
   0,
   10
  ],
  [
   45,
   428,
   "TACH 是集电极开路，也跟着到 12V —— 直连 IO48 会打穿 ESP32。",
   0,
   10
  ],
  [
   45,
   412,
   "10k 上拉到 12V + 10k/3.3k 分压 -> IO48 最高 2.98V。",
   0,
   10
  ],
  [
   45,
   396,
   "关断期间读到稳定高电平（测不到转速），导通期间才有脉冲 ——",
   0,
   10
  ],
  [
   45,
   380,
   "这是低边调速的固有限制，不是接线错。",
   0,
   10
  ],
  [
   45,
   175,
   "风扇电流 4x0.10 + 1x0.30 = 0.70A @12V；12V 输入预算 7.6 -> 8.3A，10A 适配器仍有余量。",
   0,
   10
  ],
  [
   45,
   155,
   "风扇座 KF2510-3A：pin1 = +12V，pin2 = 风扇回流（MOS 漏极），pin3 = TACH。",
   0,
   10
  ],
  [
   460,
   806,
   "【A】第三片 74HC595（U33）—— 5 路 EDL_EN",
   0,
   12
  ],
  [
   460,
   786,
   "级联在 U22 之后：U22.QH'(9) -> U33.SER(14)，网络名 SR_CAS2。",
   0,
   10
  ],
  [
   460,
   770,
   "整条链变成 24 位，先移入的字节落到 U33。SRCLK / RCLK / OE# 与前两片共用。",
   0,
   10
  ],
  [
   460,
   754,
   "QA~QE = EDL_EN1~5；QF/QG/QH 备用不接。",
   0,
   10
  ],
  [
   45,
   340,
   "【B】风扇：低边 N-MOS + PWM，5 个风扇并一路（§22.6）",
   0,
   12
  ],
  [
   45,
   318,
   "Q6 AO3400A 切风扇回流，D2 SS34 做续流 —— 风扇是感性负载，",
   0,
   10
  ],
  [
   45,
   302,
   "少了它 MOS 会被反峰打穿。FAN_PWM = IO47，FAN_TACH = IO48。",
   0,
   10
  ],
  [
   45,
   286,
   "5 个 TACH 并联做线或，停一个频率掉约 1/5（分不出是哪一个）。",
   0,
   10
  ],
  [
   45,
   262,
   "TACH 必须分压：低边 PWM 关断时风扇地被抬到 12V，TACH 是集电极",
   0,
   10
  ],
  [
   45,
   246,
   "开路，也跟着到 12V —— 直连 IO48 会打穿 ESP32。",
   0,
   10
  ],
  [
   45,
   230,
   "10k 上拉到 12V + 10k/3.3k 分压 -> IO48 最高 2.98V。关断期间读到",
   0,
   10
  ],
  [
   45,
   214,
   "稳定高电平（测不到转速），导通期间才有脉冲 —— 这是低边调速的",
   0,
   10
  ],
  [
   45,
   198,
   "固有限制，不是接线错。",
   0,
   10
  ],
  [
   45,
   174,
   "EDL_EN 的 100k 下拉不放这一页 —— 跟按键 MOS 栅极一样，放在载板",
   0,
   10
  ],
  [
   45,
   158,
   "上紧挨模拟开关（§8.1 复位安全）。",
   0,
   10
  ],
  [
   45,
   134,
   "风扇电流 4x0.10 + 1x0.30 = 0.70A @12V；12V 预算 7.6 -> 8.3A，10A 适配器仍有余量。",
   0,
   10
  ],
  [
   45,
   118,
   "风扇座 KF2510-3A：pin1 = +12V，pin2 = 风扇回流（MOS 漏极），pin3 = TACH。",
   0,
   10
  ],
  [
   460,
   806,
   "【A】第三片 74HC595（U33）—— 5 路 EDL_EN",
   0,
   12
  ],
  [
   460,
   786,
   "级联在 U22 之后：U22.QH'(9) -> U33.SER(14)，网络名 SR_CAS2。",
   0,
   10
  ],
  [
   460,
   770,
   "整条链变成 24 位，先移入的字节落到 U33。SRCLK / RCLK / OE# 与前两片共用。",
   0,
   10
  ],
  [
   460,
   754,
   "QA~QE = EDL_EN1~5；QF/QG/QH 备用不接。",
   0,
   10
  ],
  [
   45,
   340,
   "【B】风扇：低边 N-MOS + PWM，5 个风扇并一路（§22.6）",
   0,
   12
  ],
  [
   45,
   318,
   "Q6 AO3400A 切风扇回流，D2 SS34 做续流 —— 风扇是感性负载，",
   0,
   10
  ],
  [
   45,
   302,
   "少了它 MOS 会被反峰打穿。FAN_PWM = IO47，FAN_TACH = IO48。",
   0,
   10
  ],
  [
   45,
   286,
   "5 个 TACH 并联做线或，停一个频率掉约 1/5（分不出是哪一个）。",
   0,
   10
  ],
  [
   45,
   262,
   "TACH 必须分压：低边 PWM 关断时风扇地被抬到 12V，TACH 是集电极",
   0,
   10
  ],
  [
   45,
   246,
   "开路，也跟着到 12V —— 直连 IO48 会打穿 ESP32。",
   0,
   10
  ],
  [
   45,
   230,
   "10k 上拉到 12V + 10k/3.3k 分压 -> IO48 最高 2.98V。关断期间读到",
   0,
   10
  ],
  [
   45,
   214,
   "稳定高电平（测不到转速），导通期间才有脉冲 —— 这是低边调速的",
   0,
   10
  ],
  [
   45,
   198,
   "固有限制，不是接线错。",
   0,
   10
  ],
  [
   45,
   174,
   "EDL_EN 的 100k 下拉不放这一页 —— 跟按键 MOS 栅极一样，放在载板",
   0,
   10
  ],
  [
   45,
   158,
   "上紧挨模拟开关（§8.1 复位安全）。",
   0,
   10
  ],
  [
   45,
   134,
   "风扇电流 4x0.10 + 1x0.30 = 0.70A @12V；12V 预算 7.6 -> 8.3A，10A 适配器仍有余量。",
   0,
   10
  ],
  [
   45,
   118,
   "风扇座 KF2510-3A：pin1 = +12V，pin2 = 风扇回流（MOS 漏极），pin3 = TACH。",
   0,
   10
  ],
  [
   45,
   806,
   "【A】第三片 74HC595（U33）—— CH2 / CH3 的六个侧键 + EDL_EN1 + HUB_RST",
   0,
   12
  ],
  [
   45,
   790,
   "级联在 U22 之后：U22.QH'(9) -> U33.SER(14)，网络名 SR_CAS2，整条链 24 位。",
   0,
   12
  ],
  [
   45,
   774,
   "2026-09-06 按 PCB 几何重排（§26.18）：U33 在 y≈70 mm，正对北排的 CH2 / CH3，",
   0,
   12
  ],
  [
   45,
   758,
   "比原来从 U21(y≈50) 拉过去近 20~30 mm。Q0=EDL_EN1，Q1~Q3=K2，Q4~Q6=K3，Q7=HUB_RST。",
   0,
   12
  ],
  [
   45,
   742,
   "EDL_EN 与按键的 100k 下拉不放这一页 —— 放在载板上紧挨模拟开关（§8.1 复位安全）。",
   0,
   12
  ],
  [
   45,
   520,
   "【B】风扇：低边 N-MOS + PWM，5 个风扇并一路（§22.6）",
   0,
   12
  ],
  [
   45,
   500,
   "Q6 AO3400A 切风扇回流，D2 SS34 做续流 —— 风扇是感性负载，",
   0,
   12
  ],
  [
   45,
   484,
   "少了它 MOS 会被反峰打穿。FAN_PWM = IO18（模块脚 11），FAN_TACH = IO16（模块脚 9）。",
   0,
   12
  ],
  [
   45,
   468,
   "5 个 TACH 并联做线或，停一个频率掉约 1/5（分不出是哪一个）。",
   0,
   12
  ],
  [
   45,
   444,
   "TACH 必须分压：低边 PWM 关断时风扇地被抬到 12V，",
   0,
   12
  ],
  [
   45,
   428,
   "TACH 是集电极开路，也跟着到 12V —— 直连 GPIO 会打穿 ESP32。",
   0,
   12
  ],
  [
   45,
   412,
   "10k 上拉到 12V + 10k/3.3k 分压 -> 最高 2.98V。",
   0,
   12
  ],
  [
   45,
   396,
   "关断期间读到稳定高电平（测不到转速），导通期间才有脉冲 ——",
   0,
   12
  ],
  [
   45,
   380,
   "这是低边调速的固有限制，不是接线错。",
   0,
   12
  ],
  [
   45,
   175,
   "风扇电流 4x0.10 + 1x0.30 = 0.70A @12V；12V 输入预算 7.6 -> 8.3A，10A 适配器仍有余量。",
   0,
   12
  ],
  [
   45,
   159,
   "风扇座 2510-3A 直针（C2803349）：pin1 = +12V，pin2 = 风扇回流（MOS 漏极），pin3 = TACH。",
   0,
   12
  ],
  [
   45,
   806,
   "【A】第三片 74HC595（U33）—— CH2 / CH3 的六个侧键 + EDL_EN1 + HUB_RST",
   0,
   12
  ],
  [
   45,
   790,
   "级联在 U22 之后：U22.QH'(9) -> U33.SER(14)，网络名 SR_CAS2，整条链 24 位。",
   0,
   12
  ],
  [
   45,
   774,
   "2026-09-06 按 PCB 几何重排（§26.18）：U33 在 y≈70 mm，正对北排的 CH2 / CH3，",
   0,
   12
  ],
  [
   45,
   758,
   "比原来从 U21(y≈50) 拉过去近 20~30 mm。Q0=EDL_EN1，Q1~Q3=K2，Q4~Q6=K3，Q7=HUB_RST。",
   0,
   12
  ],
  [
   45,
   742,
   "EDL_EN 与按键的 100k 下拉不放这一页 —— 放在载板上紧挨模拟开关（§8.1 复位安全）。",
   0,
   12
  ],
  [
   45,
   520,
   "【B】风扇：低边 N-MOS + PWM，5 个风扇并一路（§22.6）",
   0,
   12
  ],
  [
   45,
   500,
   "Q6 AO3400A 切风扇回流，D2 SS34 做续流 —— 风扇是感性负载，",
   0,
   12
  ],
  [
   45,
   484,
   "少了它 MOS 会被反峰打穿。FAN_PWM = IO18（模块脚 11），FAN_TACH = IO16（模块脚 9）。",
   0,
   12
  ],
  [
   45,
   468,
   "5 个 TACH 并联做线或，停一个频率掉约 1/5（分不出是哪一个）。",
   0,
   12
  ],
  [
   45,
   444,
   "TACH 必须分压：低边 PWM 关断时风扇地被抬到 12V，",
   0,
   12
  ],
  [
   45,
   428,
   "TACH 是集电极开路，也跟着到 12V —— 直连 GPIO 会打穿 ESP32。",
   0,
   12
  ],
  [
   45,
   412,
   "10k 上拉到 12V + 10k/3.3k 分压 -> 最高 2.98V。",
   0,
   12
  ],
  [
   45,
   396,
   "关断期间读到稳定高电平（测不到转速），导通期间才有脉冲 ——",
   0,
   12
  ],
  [
   45,
   380,
   "这是低边调速的固有限制，不是接线错。",
   0,
   12
  ],
  [
   45,
   190,
   "风扇电流 4x0.10 + 1x0.30 = 0.70A @12V；",
   0,
   12
  ],
  [
   45,
   176,
   "12V 输入预算 7.6 -> 8.3A，10A 适配器仍有余量。",
   0,
   12
  ],
  [
   45,
   162,
   "风扇座 2510-3A 直针（C2803349）：",
   0,
   12
  ],
  [
   45,
   148,
   "pin1 = +12V，pin2 = 风扇回流（MOS 漏极），pin3 = TACH。",
   0,
   12
  ],
  [
   45,
   806,
   "【A】（已搬走）第三片 74HC595（U33）2026-09-06 随整条链挪到载板 C6-KEYS（§26.23）。",
   0,
   12
  ],
  [
   45,
   790,
   "EDL_EN1~5 / HUB_RST 从此是载板内部网络，不再过排针。这一页只剩风扇。",
   0,
   12
  ],
  [
   45,
   520,
   "【B】风扇：低边 N-MOS + PWM，5 个风扇并一路（§22.6）",
   0,
   12
  ],
  [
   45,
   500,
   "Q6 AO3400A 切风扇回流，D2 SS34 做续流 —— 风扇是感性负载，",
   0,
   12
  ],
  [
   45,
   484,
   "少了它 MOS 会被反峰打穿。FAN_PWM = IO18（模块脚 11），FAN_TACH = IO16（模块脚 9）。",
   0,
   12
  ],
  [
   45,
   468,
   "5 个 TACH 并联做线或，停一个频率掉约 1/5（分不出是哪一个）。",
   0,
   12
  ],
  [
   45,
   444,
   "TACH 必须分压：低边 PWM 关断时风扇地被抬到 12V，",
   0,
   12
  ],
  [
   45,
   428,
   "TACH 是集电极开路，也跟着到 12V —— 直连 GPIO 会打穿 ESP32。",
   0,
   12
  ],
  [
   45,
   412,
   "10k 上拉到 12V + 10k/3.3k 分压 -> 最高 2.98V。",
   0,
   12
  ],
  [
   45,
   396,
   "关断期间读到稳定高电平（测不到转速），导通期间才有脉冲 ——",
   0,
   12
  ],
  [
   45,
   380,
   "这是低边调速的固有限制，不是接线错。",
   0,
   12
  ],
  [
   45,
   190,
   "风扇电流 4x0.10 + 1x0.30 = 0.70A @12V；",
   0,
   12
  ],
  [
   45,
   176,
   "12V 输入预算 7.6 -> 8.3A，10A 适配器仍有余量。",
   0,
   12
  ],
  [
   45,
   162,
   "风扇座 2510-3A 直针（C2803349）：",
   0,
   12
  ],
  [
   45,
   148,
   "pin1 = +12V，pin2 = 风扇回流（MOS 漏极），pin3 = TACH。",
   0,
   12
  ],
  [
   45,
   190,
   "【风扇】FAN-R2：两只 4 线 PWM 风扇，一进一出",
   0,
   12
  ],
  [
   45,
   168,
   "型号 山洋 9G0612P4S001 / C2920592。高边默认关电 + 独立 PWM + 两路独立测速。",
   0,
   10
  ],
  [
   45,
   150,
   "Q7(AO3401A) 串在 +12V 与 FAN_12V_SW 之间，R746 把栅极拉回源极；",
   0,
   10
  ],
  [
   45,
   132,
   "Q8 经 R748 由 FAN_EN(IO5) 驱动，R749 在复位/高阻时拉低 = 默认断电。",
   0,
   10
  ],
  [
   45,
   114,
   "DZ3(BZT52C8V2) K 接源极、A 接栅极，钳位负 Vgs（绝对最大 ±12V）。",
   0,
   10
  ],
  [
   45,
   92,
   "调速走风扇自己的 PWM 脚(pin4)：Q6 只拉低这根线，不再切风扇回流。",
   0,
   10
  ],
  [
   45,
   74,
   "栅极高 = 风扇 PWM 线低，固件必须反相：D_gpio = 1 - D_fan。",
   0,
   10
  ],
  [
   45,
   56,
   "0% PWM 风扇仍转约 3300RPM，要停转只能撤 FAN_EN，不能靠占空比。",
   0,
   10
  ],
  [
   45,
   430,
   "测速两路独立：TACH 上拉到 FAN_12V_SW，15k/10k 分压驱动 Q9/Q10，",
   0,
   10
  ],
  [
   45,
   412,
   "漏极经 10k 上拉到 +3V3 —— 接收电路反相，TACH 低对应 GPIO 高。",
   0,
   10
  ],
  [
   850,
   595,
   "风扇座 J26/J27（2510-4A 直针 1x4P）：",
   0,
   10
  ],
  [
   850,
   575,
   "1=GND  2=+12V(开关后)  3=TACH  4=PWM",
   0,
   10
  ],
  [
   850,
   555,
   "注意：针序与旧的 3 针 J26~J30 不同，装配前对丝印。",
   0,
   10
  ],
  [
   45,
   190,
   "【风扇】FAN-R2：两只 4 线 PWM 风扇，一进一出",
   0,
   12
  ],
  [
   45,
   168,
   "型号 山洋 9G0612P4S001 / C2920592。高边默认关电 + 独立 PWM + 两路独立测速。",
   0,
   10
  ],
  [
   45,
   150,
   "Q7(AO3401A) 串在 +12V 与 FAN_12V_SW 之间，R746 把栅极拉回源极；",
   0,
   10
  ],
  [
   45,
   132,
   "Q8 经 R748 由 FAN_EN(IO5) 驱动，R749 在复位/高阻时拉低 = 默认断电。",
   0,
   10
  ],
  [
   45,
   114,
   "DZ3(BZT52C8V2) K 接源极、A 接栅极，钳位负 Vgs（绝对最大 ±12V）。",
   0,
   10
  ],
  [
   45,
   92,
   "调速走风扇自己的 PWM 脚(pin4)：Q6 只拉低这根线，不再切风扇回流。",
   0,
   10
  ],
  [
   45,
   74,
   "栅极高 = 风扇 PWM 线低，固件必须反相：D_gpio = 1 - D_fan。",
   0,
   10
  ],
  [
   45,
   56,
   "0% PWM 风扇仍转约 3300RPM，要停转只能撤 FAN_EN，不能靠占空比。",
   0,
   10
  ],
  [
   430,
   300,
   "测速两路独立：TACH 上拉到 FAN_12V_SW，15k/10k 分压驱动 Q9/Q10，",
   0,
   10
  ],
  [
   430,
   282,
   "漏极经 10k 上拉到 +3V3 —— 接收电路反相，TACH 低对应 GPIO 高。",
   0,
   10
  ],
  [
   850,
   595,
   "风扇座 J26/J27（2510-4A 直针 1x4P）：",
   0,
   10
  ],
  [
   850,
   575,
   "1=GND  2=+12V(开关后)  3=TACH  4=PWM",
   0,
   10
  ],
  [
   850,
   555,
   "注意：针序与旧的 3 针 J26~J30 不同，装配前对丝印。",
   0,
   10
  ]
 ],
 "nRect": 0,
 "nPoly": 0
}