A ring of blue LEDs with a bit of a steampunk look and a nod to Iron Man®'s Arc Reactor.
The Madlab Atom Heart Electronic Kit has different patterns of light are selected with the pushbutton.
The slots in the board can be used to strap Atom Heart to a Teddy bear or other object.
Uses 2 x 3V CR2025 coin cells (not included). Part Number MadLab MLP103