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NitrogenGenerator

tinic·NitrogenGenerator

NitrogenGenerator PCB layout, top view — open source STM32 board by tinic

About the NitrogenGenerator PCB

NitrogenGenerator is an open source STM32 PCB design by tinic, published on GitHub under the Custom license license. It is a 2-layer board measuring 160 × 55 mm, with 29 components from 17 distinct parts.

Its main chip is the STM32G030F6Px, from the STM32 family. Other key parts include the IRM-45-24, R-78E5.0-0.5 and TLV70433DBVR. By type, the board carries 9 capacitors, 7 resistors, 5 connectors, 4 ICs, 2 relays and 2 diodes.

From the project

DIY membrane nitrogen generator for home brewing nitro cold brew and beer. 50L/h output at 99.5%+ purity, 100 PSI, ~$2,200 build. Includes KiCad PCB, STM32 firmware, SolidWorks CAD, and full P&ID. Open source hardware alternative to $4,500+ commercial units.

[](./images/final_inside.jpg) [](./images/solidworks.jpg) [](./images/airschematic.png)

As a home brewer CO₂ is the gas of choice for most purposes, including pushing beverages to the tap. But sometimes you don't want to just serve beer but also cold brew coffee and other non-carbonated beverages. In most cases a simple N₂ cylinder does the job — but given that air is 78% nitrogen, why not just extract it from the air? Recently products like NitroBev 360 have introduced this possibility on a small scale, at a price. Given the huge margins these niche products have to have, my thought was to…

NitrogenGenerator, from the project README
From the project README

Main components on the NitrogenGenerator

STM32G030F6PxIRM-45-24R-78E5.0-0.5TLV70433DBVR

NitrogenGenerator bill of materials (BOM)

29 components, 17 distinct parts.

QtyPartRefs
1
STM32G030F6Px
U1
1
IRM-45-24
U2
1
R-78E5.0-0.5
U3
1
TLV70433DBVR
U4
1
Screw_Terminal_01x10
J2
1
ERM19264-4
J3
2
726386-2
J4, J5
1
Conn_01x06_Pin
J6
2
AA28F-R1
K1, K2
2
1N4007
D1, D2
3
0.1uF
C1, C2, C3
4
4.7uF
C4, C5, C6, C7
2
22nF
C8, C9
2
1.6K
R1, R2
2
10K
R3, R4
2
20K
R5, R6
1
100
R7

NitrogenGenerator design files

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

NitrogenGenerator: common questions

What microcontroller does the NitrogenGenerator use?

The NitrogenGenerator is built around the STM32G030F6Px, from the STM32 family.

How big is the NitrogenGenerator PCB?

The NitrogenGenerator measures 160 × 55 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the NitrogenGenerator?

29 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the NitrogenGenerator design files?

From the tinic/NitrogenGenerator repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the NitrogenGenerator design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the NitrogenGenerator without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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