Bill of Materials

Interactive shopping checklist

Use this checklist to track what you already have for the build. The state is saved locally in your browser.

Development board of choice

A printed circuit board (PCB) that includes a microcontroller or microprocessor, along with necessary components and interfaces for prototyping and development.

Capacitive Soil Moisture Sensor

Measures soil humidity via capacitance change instead of resistance. Corrosion-resistant and provides analog voltage proportional to moisture.

MOSFET Module

Small logic-level power switch board that lets 3.3V logic control high-current DC loads like pumps or valves.

Valve 12V DC

Small 12V DC solenoid valve for controlling water flow in low-pressure applications.

5 V USB wall power supply (≥ 2 A)MT3608

DC-DC boost converter that steps up voltages, for example from 5V to 12V, with adjustable output.

Flyback Diode (e.g. 1N5819)Wires3D-printed tankBasic tools (screwdriver, wire stripper, soldering iron and multimeter)

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Detailed BOM

Qty	Component	Example / Notes
1	Development board of choice A printed circuit board (PCB) that includes a microcontroller or microprocessor, along with necessary components and interfaces for prototyping and development.	Any MicroPython A compact version of Python for microcontrollers like the ESP32 and Raspberry Pi Pico. It lets you script directly on embedded hardware. -capable board with USB and optional on-board LED A light-emitting diode used frequently as a status indicator in electronic devices.
1	Capacitive Soil Moisture Sensor Measures soil humidity via capacitance change instead of resistance. Corrosion-resistant and provides analog voltage proportional to moisture.	Analog-output
1	MOSFET Module Small logic-level power switch board that lets 3.3V logic control high-current DC loads like pumps or valves.	Logic-level MOSFET Metal-Oxide-Semiconductor Field-Effect Transistor - an electronic power switch. Logic-level MOSFETs can be driven directly from GPIO pins. (IRLZ44N,D4184 , AO3400A, or similar) on a breakout
1	DC Direct Current - electric current flowing in one direction, common in batteries and embedded devices. pump or DC Valve A direct-current operated valve, typically a small solenoid valve used to open or close water flow.	Small 12 V valve
1	USB Wall Power Supply A wall-powered USB charger that provides stable power for embedded projects. Prefer this over powering motors or valves directly from a computer USB port.	≥ 2 A recommended for pump inrush
1	DC-DC Converter Converts one DC voltage level to another, for example stepping 5V up to 12V for pumps or valves.	For the Valve Control
1	Flyback Diode A diode placed across inductive loads like valves or pumps to absorb voltage spikes when current is interrupted.	1N5819 or similar Schottky diode
1	Proto Board A prototyping board with copper pads or holes for quickly assembling circuits before designing a custom PCB. (optional)	For manual wiring
3	Wires	Separate colored Wires
—	Filament (PETG A durable and easy-to-print 3D printing filament known for strength, flexibility, and resistance to impact and moisture. / ASA A strong and weather-resistant 3D printing filament, ideal for outdoor applications due to its UV and impact resistance. / PLA A biodegradable and easy-to-print 3D printing filament made from renewable resources such as corn starch or sugarcane. )	For the tank, valve mount, and electronics enclosure