Скачать или смотреть YL-85 Rain Sensor Alarm Circuit | 555 Timer Schematic + PCB Design in Altium Designer

YL-85 Rain Sensor Alarm Circuit | 555 Timer Schematic + PCB Design in Altium Designer

In this tutorial, I’ll design a rain alarm circuit using the YL-85 rain sensor and a 555 timer (NE555PE4). When rain is detected, the circuit triggers a speaker alarm (8Ω) via transistor amplification.

✅ What You’ll Learn:

Schematic Design: 555 timer in monostable mode for rain-triggered output.
PCB Layout in Altium Designer 24.4.1: Component placement for sensor/speaker connections.
Sensor Calibration: Adjust sensitivity via resistor (R3 = 47K).
🔧 Files Included:

Schematic (.SchDoc)
PCB Layout (.PcbDoc)
BOM (Bill of Materials)

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