Capacitive Soil Moisture Sensor - Hardware Modification 5V to 3V

Description

This project describes how to modify specific versions of the Capacitive Soil Moisture Sensor that come without a voltage regulator and use a NE555 timer instead of a TCL555. The modification involves replacing the resistor R4 with a 91K Ohm resistor to achieve a 3V analog output signal.

Modification Instructions

1. Materials:

   • Capacitive Soil Moisture Sensor (with NE555 without XC6206P302)
   • 91K Ohm resistor
   • A fine soldering iron and a steady hand

2. Modification Steps:

   • Remove the existing resistor and replace it with the 91K Ohm resistor.

3. Expected Outcome:

   • After modification, the sensor should output a 3V analog signal.

Before and After

Here are some images demonstrating the modification process:

Notes

• Take care during the modification process to avoid damaging the pcb.
• It is recommended to conduct tests to verify functionality after the modification, including measuring the output signal to ensure it is providing the expected 3V analog output.

Further Information

For additional information, you can check the following links:

• capacitive soil moisture sensor (capsense)
• YouTube Kapazitive Bodenfeuchtigkeitssensoren funktionieren nicht + Fix für v2.0/1.2