The device is controlled using Arduino, along with a shift register to increase the number of available ports. The liquid (eg. our favorite coffee), works as a common anode, connected to a 9V battery. The current required for the electrolysis process is controlled by MOSFET transistors. You can actually safely drink the liquid inside – however, it does require adding a bit of baking soda to improve conductivity. The whole device is also equipped with sensors that cut off the current whenever you take a sip to avoid electrocution.
The circuit can display up to four digits, allowing you to show, for example, the current time or the LOVE letters on your drink. Let’s hope Mrs. Ayaka Ishii and Mr. Itiro Siio will be able to develop their product, allowing us to finally read our coffee in the future.
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