Wiring Sound Sensor with Relay

flux

2:09

Below is a summary of the schematic changes to be made. You can use the Apply changes button to update your schematic accordingly:
1. Sound Sensor (KY 037) Update:
2. Relay (SPDT Relay DS1E-M-DC24V) and ESP32 Interface:
3. Powering the Relay:
  • Use the 5V supply from V1 (V1) for the relay’s power.
    • Connect V1 output (5V) to the relay’s power input (if your relay module has a dedicated VCC pin) or to the appropriate node that supplies the coil voltage as specified in your design.
4. Load (LED) with Current-Limiting Resistor:
  • Add a LED component (for example, a generic LED).
  • Add a 220Ω resistor (for example, R?) to serve as the current-limiting resistor.
  • Wire the connections as follows:
    • Connect SPDT Relay DS1E-M-DC24V pin NO to the LED (Anode).
    • Connect the LED (Cathode) through the 220Ω resistor to GND.
These changes will implement the interconnections as described in your specification:
  • The Sound Sensor is now powered from the ESP32’s 3.3V and its analog output (A0) is connected to GPIO34.
  • The ESP32 drives the relay’s control input via GPIO26, while the relay coil is referenced to a common GND.
  • The Relay directs the 5V supply (or external supply) to drive the load (LED) when activated, with the LED current limited by a 220Ω resistor.
You can now use the Apply changes button to update your schematic with these wiring modifications.
Run ERC check
Add LED and resistor
Verify GPIO26 relay connection
Double-check sensor mapping
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KY 037 Noise Sensor
D1
ESP 32
V1
Relay
R1
Resistance
500 Ω
  • Ground
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