The circuit is largely made up out of passive components anyway, except for the ATtiny85 that’s running the show. [Zane] decided to embrace modernity and couple the circuit with a USB-C breakout ...

It became so popular that the ATtiny85 even got packaged into USB dongle formfactors, like the DigiSpark boards. Well, you might not know this, but your Android smartphones can also work with USB ...