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Picture of 8-Bit Arduino Valentine's Heart
heart final.jpg
heart ribbon.jpg
heart resistors.jpg

Show your 8-bit love this Valentine's day by printing and wiring up your own "8-bit Heart".

I picked my resistors using this resistor calc:

I then divided the result by three for a few reasons: Firstly the LEDs I'm using (like my dearest) are cheap and dim. Secondly each LED will only be briefly lit for less than 1/3 of the time, and finally (like my love) nothing lasts forever.

BOM:

  • 1 Arduino, any basic (eg not LeoStick)
  • 17 Red LEDs (or 34)
  • 17 Resistors (~50ohm in my case)
  • 1 Ribbon Cable
  • 2 Printed 8 bit hearts
  • 2 M3 x 30mm bolts with nuts (and optional washers).
  • 1 Set of header pins (18 pins total)
  • Heat shrink

Step 1: Print the heart

Picture of Print the heart
heart empty.jpg

First we will need to decide on which setup we'll be doing. The options are for a single heart, two or four. In this example I'll be doing the single (If you really loved them you'd do 2 or 4, but I'm like "meh, good enough"), but it's simple enough to extrapolate the 2 and 4 heart versions by multiplying the led count by 2 or 4 and adjusting the resistors (actually I suspect wiring all four may require more power than the Arduino can supply, but I'll update when I know for sure).

Edit: Woops... I seem to have forgotten the STL and thingiverse links (bonus .scad for the real 3d geeks).

http://www.thingiverse.com/thing:246633