HardLabs

M19O2

MakersAsylumIndia·M19O2·engineering/CAD/M19O2/Humidity_Alarm/DHT22_pcb/DHT22_pcb.kicad_pcb

M19O2 PCB layout, top view — open source board by MakersAsylumIndia
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About the M19O2 PCB

M19O2 is an open source PCB design by MakersAsylumIndia, published on GitHub under the MIT license. It is a 2-layer board measuring 28 × 13 mm, with 4 components from 4 distinct parts.

Other key parts include the DHT22. By type, the board carries 1 IC, 1 connector, 1 capacitor and 1 resistor.

It belongs with the sensors designs in this gallery.

From the project

M19O2 open source hardware Oxygen Concentrator based on the Pressure Swing Adsorption cycle aka Skarstorm cycle

Reads a DHT-22 sensor attached in-line between the output of Dessicant Sieve and input of high pressure regulator of the M19O2 Oxygen Concentrator. This tells us how much moisture is entering the Zeolite Dessicant Sieves.

HIGH = >50%rH = Red Blinking LED + Buzzer MID = 30%rH = Red Blinking LED LOW = 15%rH = Blinking Green LED AWESOME = <15%rH = Steady Green LED

M19O2, from the project README
From the project README

Main components on the M19O2

DHT22

M19O2 bill of materials (BOM)

4 components, 4 distinct parts.

QtyPartRefs
1
DHT22
U1
1
Output
J1
1
100nF
C1
1
4k7
R1

M19O2 design files

The KiCad project lives in the MakersAsylumIndia/M19O2 repository on GitHub; these links point at the commit this page was built from.

M19O2: common questions

How big is the M19O2 PCB?

The M19O2 measures 28 × 13 mm, has 2 copper layers and is 1 mm thick.

How many components are on the M19O2?

4 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the M19O2 design files?

From the MakersAsylumIndia/M19O2 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the M19O2 design in my own project?

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

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