Electrolyser and payment card: what they have in common

1. Step 1. Electrolyser — is made of — Electrolyte. Between them is an electrolyte.
2. Step 2. Electrolyte — is material for — Alkaline battery. The electrolyte is potassium hydroxide.
3. Step 3. Alkaline battery — is part of — Electronic calculator. A calculator runs on a battery, sometimes on a tiny solar panel.
4. Step 4. Electronic calculator — has part — Integrated circuit. A chip.
5. Step 5. Integrated circuit — is part of — Payment card. An EMV chip.

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