H2Gen

Fab Lab Bali's current flagship initiative is Hydrogen Village, a continuation and expansion of Balon-Balon Ijo, one of the Fab Island Challenge from Bali Fab Fest 2022. This initiative aims to aid Bali's attempt to achieve net zero emission by 2045 by introducing the application of hydrogen gas as a renewable energy source.

This project is called H2Gen, a compact automated hydrogen generator from seawater using alkaline electrolyser to be used for household or small neighborhood scale. This final project is focused only on the automation controller module because the scale and complexity of the project as a whole are too much for the limitted time we have in Fab Academy.

License

This project is licensed under Creative Commons Attribution-ShareAlike 4.0 International License. This means you are free to share and adapt this project under these circumstances:

• Attribution: You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• Share a like: If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
• No additional restrictions: You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Bill of Materials

The approximate total cost of the components and materials listed below are IDR 336,920 or about USD 21. All of them are sourced from as little number of sellers possible on Tokopedia, Indonesian largest marketplace.

	Quantity	Price	Total
XIAO ESP32-C3	1	IDR 127.500	IDR 127.500
LM2596HVS Buck Converter	1	IDR 11,200	IDR 11,200
Relay 5V 2 channel	1	IDR 10,500	IDR 10,500
0.96" OLED screen	1	IDR 26,500	IDR 26,500
KY-40 rotary encoder	1	IDR 6,500	IDR 6,500
KY-003 hall effect sensor	2	IDR 5,000	IDR 10,000
Female straight header - 7 pin	2	IDR 700	IDR 1,400
JST XH right angle - 2 pin	1	IDR 1,000	IDR 1,000
JST XH right angle - 3 pin	4	IDR 1,500	IDR 6,000
JST XH right angle - 4 pin	1	IDR 2,000	IDR 2,000
JST XH right angle - 5 pin	1	IDR 2,500	IDR 2,500
JST XH right angle - 7 pin	2	IDR 3,000	IDR 7,000
JST XH straight - 4 pin	1	IDR 1,700	IDR 1,700
KF2EDG right angle terminal block - 2 pin	3	IDR 2,500	IDR 7,500
Screw terminal block - 2 pin	3	IDR 1,750	IDR 5,250
Capacitor 1206 - 100 nF	7	IDR 400	IDR 2,800
Resistor 1206 - 1 kΩ	14	IDR 150	IDR 2,100
Resistor 1206 - 470 Ω	2	IDR 150	IDR 300
Transistor NPN SOT-23	2	IDR 400	IDR 800
Schottky Diode	1	IDR 250	IDR 250
Signal cable	1 m	IDR 9,900	IDR 9,900
Cable 16 AWG	20 cm	IDR 9,500 / m	IDR 1,900
Cable 18 AWG	20 cm	IDR 6,500 / m	IDR 1,300
Cable 20 AWG	30 cm	IDR 4,500 / m	IDR 1,350
M3 screw - 6 mm	22	IDR 400	IDR 8,800
M3 screw - 12 mm	2	IDR 400	IDR 800
M4 screw - 8 mm	10	IDR 500	IDR 5,000
M4 screw - 20 mm	2	IDR 650	IDR 1,300
M3 nylon spacer - 6 mm	18	IDR 590	IDR 10,620
FR1 PCB board - 10 x 10 cm	1	IDR 4,000	IDR 4,000
PLA filament	350 g	IDR 154,000 / kg	IDR 53,900
3 mm Acrylic sheet - 10 x 15 cm	150 cm2	IDR 23 / cm2	IDR 5,250
		Total	IDR 336,920

Development & System Integration

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Files

• H2Gen - KiCad Project (zip)
• H2Gen - Controller Module - Lite (f3z)
• 3D Printed Parts (zip)
• Internal Frames (svg)