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In this Pro Trinket powered project, build and 3D print yourself a friend, an Adafriend! This little colorful guy with an eye responds to taps and vibrations, and shows emotion on its little LED matrix face with a sad, neutral, happy, or angry face. It plays tones that correspond to it's emotional state, and even sings some recognizable tunes and themes when it's in the mood! If left alone for too long it gets lonely, but pester your pet too much and it may get angry at you! Build yourself an Adafriend and keep it happy to sing along with the coolest cube around!
This project takes an existing tool — the Hakko FX-901 cordless soldering iron — and adds USB charging and a beefy Lithium Ion battery inside a 3D-printed pack. I keep this little iron around for cosplay electronics emergencies, and adding USB charging means there’s less to pack…it uses the same phone charger and USB cable I’m already carrying.