HardLabs

Pi plant

rringler·pi_plant·Custom PCB/MCP3002.kicad_pcb

Pi plant PCB layout, top view — open source board by rringler
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About the Pi plant PCB

Pi plant is an open source PCB design by rringler, published on GitHub under the MIT license. It is a 2-layer board measuring 33 × 30.5 mm, with 11 components from 6 distinct parts.

Other key parts include the MCP3002. By type, the board carries 4 connectors, 3 transistors, 3 resistors and 1 IC.

It belongs with the sensors designs in this gallery.

From the project

Small app to monitor and water my plant with a Raspberry Pi

* Includes three 2N3904 transistors to allow the Pi to control the power provided to the MCP3002 & the two analog sensors:

(Leaving these two-prong type of sensors powered on 24/7 can lead to galvanic corrosion, so it's probably better to turn them on when needed.)

* Provides two analog measurement channels. Also supplies VCC & GND (in case the moisture sensor requires it) for each.

Pi plant, from the project README
From the project README

Main components on the Pi plant

MCP3002

Pi plant bill of materials (BOM)

11 components, 6 distinct parts.

QtyPartRefs
1
MCP3002
U1
3
2N3904
Q1, Q2, Q3
1
CONN_01X02
P1
1
CONN_01X07
P2
2
CONN_01X03
P3, P4
3
1K
R1, R2, R3

Pi plant design files

The KiCad project lives in the rringler/pi_plant repository on GitHub; these links point at the commit this page was built from.

Pi plant: common questions

How big is the Pi plant PCB?

The Pi plant measures 33 × 30.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pi plant?

11 components, from 6 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pi plant design files?

From the rringler/pi_plant repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Pi plant design in my own project?

Yes, under the terms of its MIT license, which rringler chose for the repository.

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