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2 layers48 × 100 mmRis switch module, the printed circuit board in 3D

Regulated Irrigation System (RIS)

Size
48 × 100 mm
Copper layers
2
Thickness
1.6 mm
Parts
35
Nets
27
Pads
96
Tracks, vias
121, 4
Pours
1
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
30 Jul 2025
Updated
14 Mar 2026

Overview

Ris switch module is an open-source printed circuit board by samgeorgedixon, from the samgeorgedixon/regulated-irrigation-system repository on GitHub. It is a 2-layer board of 48 × 100 mm with 35 parts on 27 nets, routed with 121 tracks and 4 vias.

It is built around the IRLZ44N. Its parts include 12 resistors, 10 connectors, 6 diodes, 6 transistors and 1 IC.

Main components

1

README

readme.md

Regulated Irrigation System (RIS)

Modular, reliable and fine controlled irrigation for home to industrial greenhouses or farms, while adapting to varied temperatures and seasons to conserve water and ensure plant health.

Overview

Regulated Irrigation System (RIS) is modular irrigation system designed for everything from a small greenhouse to industrial farm setups. It gives you detailed control over watering routines and is able to adapt its watering output based on temperature and season. It does this while running reliably all year round unattended while conserving water.

From a phone / desktop browser you can schedule routines to water certain sets of plants at different times or intervals for durations based of current environment conditions.

Key Features
  1. Water Plants (Water Conservation).
  2. Any Environment and Scale (Greenhouse / Farm).
  3. Reliable (Works for Months / Years).
  4. Sustainable (Self Sufficient: Solar / Rain).
  5. Relatively Affordable (< ~£100).
Modules

This design is made up of multiple modules which allow it to scale to any scenario with them able to sit flat on a table or be easily mounted onto a wall with keyholes.

  • Command Module: Central, controlling all other modules based on the routines you have set.
  • Switch modules: Add as many as needed where they interface with command to turn on certain ones of its 6 ports to power your water pumps or valves when needed.
  • Valves / Pumps: Allow water to be pumped to specific sets of plants for different durations giving you full control.
Power

All operates off 1 battery that is charged continuously with a solar panel to ensure it can run for years in remote locations like an allotment or field.

You can then choose to power the pumps and valves by another source like mains or an external battery pack if they require more power in industrial environments.

Small Greenhouse Scenario

To take advantage of it in this scenario you can have both sides of the greenhouse on different valves because they may get a different amount of sunlight or have different varieties of plant so one side needs more water than the other.

  1. Then you can have a pump that is operated with each valve at a time taking water out of a water tank and distributing it but also have another that fills the tank every couple weeks with more water from a water butt.
  2. Due to only giving the plants the water they need they will have increased yields, and it will conserve water which is important when using a water butt as when there is little rainfall it will still have leftover water.
  3. As well as this due to water duration being done based of temperature, across the year plants will get more water in the summer when they need it more and little to none in the winter when they don’t need it.

Parts

35
QtyValueFootprintReferences
6DDiode_THT:D_DO-201AD_P12.70mm_HorizontalD1, D2, D3, D4, D5, D6
6IRLZ44NMOSFET-IRLZ44N:TO254P1054X469X1930-3Q1, Q2, Q3, Q4, Q5, Q6
6JST-PH-2P-MJST-B2P-VH:B2P-VHJ4, J5, J6, J7, J8, J9
6R-10kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_HorizontalR7, R8, R9, R10, R11, R12
6R-220Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_HorizontalR1, R2, R3, R4, R5, R6
2JST-B2PS-VH-MJST-B2P-VH:B2P-VHJ3, J10
2JST-PH-5P-MB5B-PH-K-S:JST_B5B-PH-K-SJ1, J2
174HC595N_11274HC595N_112:DIP254P762X420-16U5

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Questions

How big is the Ris switch module PCB?

It measures 48 × 100 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Ris switch module use?

35 parts, built around the IRLZ44N. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Ris switch module KiCad files?

From the samgeorgedixon/regulated-irrigation-system repository on GitHub, at the commit this page was made from: the board is circuit/ris_switch-module/ris_switch-module.kicad_pcb and its schematic circuit/ris_command-module/ris_command-module.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Ris switch module design in my own project?

Its repository states no licence, so its author keeps all rights: ask samgeorgedixon before reusing the design.