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Capacitive Soil Sensor - Hardware details

Pinout​

Capacitvie soil sensor pinout image

Click here for a high resolution image of the pinout.

Pin Details​

Pin MarkingPin NameDescription
GNDGroundCommon ground for power and signals.
AOUTAnalog OutputAnalog voltage level corresponding to soil moisture.
VCCPowerSupply voltage (3.3V to 5V).

Dimensions​

  • PCB Dimensions: 109 × 22 mm (4.3 × 0.9 inch)
  • Sensing Area: ~60 mm length
  • Header Pin Holes: 1.5 mm diameter
  • Mounting Hole: 3.2 mm diameter (M3 screw compatible)
  • Board Thickness: ~1.6 mm
  • Soldered boards are LEGO compatible! 🧱

Hardware repository​

Schematics, KiCad files, Gerber files, and more can be found in the GitHub repository:

Capacitive Soil Sensor Hardware Repository

Open-source files for PCB design, schematics, and manufacturing.

The hardware repository contains everything you need to understand, modify, or manufacture the board.

CAD files​

The .kicad_pro project contains both schematic and PCB layout. It can be edited using KiCad.

Schematic​

Located in the outputs folder in .pdf format for easy reference.

BOM (Bill of Materials)​

Includes a .csv file listing all components, values, and part numbers. An interactive HTML BOM is also included for visual identification of components on the board.

3D files​

A .step file of the PCB is available for 3D inspection in CAD software.

Gerber files​

Standard Gerber files and drill files are provided in a .zip, ready for fabrication.

  • Copper layers (.Cu.gbr)
  • Solder mask (.Mask.gbr)
  • Silkscreen (.Silkscreen.gbr)
  • Drill files (.drl)
  • Edge cuts (.Edge_Cuts.gbr)
  • Gerber job file (.gbrjob)

Compliance​

Files for regulatory compliance may be added in future revisions.