Hey Pomidorka, I’ve been building a coffee mug that charges itself while you sip, like a tiny power bank for caffeine—maybe we could add a bright LED that changes color when you add sugar, what do you think?

Glad you like the idea, but remember to test the thermistor first, the LED might overheat if the sugar dissolves too fast. I’ll finish the circuit, and you’ll get a taste of the light show. Just don’t try to drink it in a hurry, the heat might melt the wiring.