I upgraded my seltzer machine by hooking it up to a 50lb CO2 tank, with the help of my friend Ian. We’re calling it “Endless Seltzer”. We both really love fizzy water.
Ian Charnas is a YouTuber who does mechanical engineering, electrical engineering, and computer engineering. In his videos he makes these super fun inventions and raffles them off to support good causes – so you can win almost everything you see on his channel.
We did some research online and found this adapter you can get that connects the SodaStream to a more industrial standard type tank. That’s all that’s really required for the minimum viable product, but naturally, we wanted to add a bit more engineering so we also built an internet-connected scale that keeps track of how much CO2 is left.
Supplies and Tools:
- SodaStream or similar sparkling water maker
- Tank-to-SodaStream adapter hose
- Crescent wrench
- 50lb (or other size) CO2 tank (from local welding supply)
- Tank safety bracket with strap
- CO2 safety monitor/alarm
- 4x Load cells
- 4x Load cell amplifiers
- ESP8266 microcontroller (we’re using the Feather Huzzah)
- AC adapter with microB connector
- LCD display with i2c/SPI backpack
- Solderless breadboard for prototyping
- Solder-type breadboard for finished circuit
Check out the electronics components in a saved list on Digi-Key.
Although you don’t have to build the electronics part of this project to enjoy the fizzy benefits, you must understand the dangers of working with a pressurized tank of gas. If it falls over and the valve is damaged, the whole thing could become a dangerous projectile. Basically a missile. The main precaution we’re taking is to install a tank strap to the wall. Don’t skip this step. I’m also setting up a CO2 safety monitor/alarm just in case there’s a leak.
Check out all my favorite electronics tools and supplies.
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