Building e-textiles or jewelry? This little fella doesn't have any wireless comms, but it's washable and sewable and super duper tiny.
Let's take a look!
Hook up the TinyLily processor's (+) and (-) pins to a 3V coin cell battery, a 5V USB battery, or anything else between 2.7 and 5.5 volts.
Connect the processor's Pin 1 to the LED's (+) pin, and the LED's (-) pin back to the processor's (-) pin. TinyLily LEDs have a resistor already connected, so no need to bother with those!
Now, please forgive the hand-drawn schematic, as there aren't yet Fritzing components for these... :)
You can modify the basic Arduino Blink sketch to make both of these small projects.
Just substitute in pin 1 – which is one of the ones broken out along the outer edge – on lines 20, 25, and 27.
When you're ready to program, plug the TinyLily Mini processor into its USB-to-FTDI programmer, and connect that to your computer with a Micro USB cable. Select "Arduino Pro or Pro Mini" from the Boards menu, and of course the applicable USB port. Then, fire away!
Let's build an edge-lit LED pendant. It simply uses the flat, surface-mounted LED to project light through an etched piece of clear acrylic. The light "catches" on the etched areas, so they light up.
Here, I've used the jumper wires to "spear" the components to a breadboard, but you can also use soldered wire or conductive thread.
You can add reflective foil around the edges (carefully insulated from the LED), and a black backing – so you can tuck a 3V coin cell behind to power it.
I made this pendant in TechShop's laser-cutter training class; it's a punny representation of my name. See if you can figure it out :)
Replace the LED with a haptic vibration motor to remind you of anything – for example: maintaining a meditative or drowsy creative state, habit tracking, medication reminders, or anything else you'd like to keep top-of-mind.