At a mere 2 square micrometers in size, this is the world's smallest QR code and it's 'smaller than most bacteria'

The QR code is so small, in fact, that it can "only be recognised with an electron microscope". As a result, the research ...
Circuit Digest

DIY Raspberry Pi Pico Text-to-Speech Using Wit.ai

Type a sentence into the input bar at the top of the Serial Monitor and hit Enter to send it to the Wit.ai API. The console will log " Requesting TTS " followed by " Buffer ready, starting playback ," ...