48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
ESP32-H2 GPIO10 (UART1 TX)
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v
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+-----+-----+
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| 1kΩ | Pull-up
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+-----+-----+
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+--------+
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+-----+-----+ |
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| NPN BJT | | BC817 or 2N3904
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| Q1 |<-+
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+-----+-----+
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|C
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+-----------+
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+----+----+ +---+---+
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| 10Ω | | 100pF | Snubber
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+----+----+ +---+---+
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+-----------+--------> To Track (via DCC cutout)
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+-----+-----+
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| 10kΩ | Pull-down
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+-----+-----+
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v
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GND
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RailCom Cutout Detection (Optional GPIO11)
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Track Signal ---+
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+---+---+
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|Voltage| Resistor divider
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|Divider| 22kΩ / 10kΩ
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+---+---+
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+---> GPIO11 (Cutout Detect)
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+---+---+
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| 0.1µF | Filter capacitor
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+---+---+
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GND
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