The solution was a nifty little chip called the MAX7219 ... That’s pretty impressive, considering the last matrix 7-segment display we saw required 48 Arduinos! Another problem is memory ...

But LEDs are far from the only way to run a seven-segment display — check out this mechanical seven-segment display for proof of that. We’ve been seeing a lot of mechanical seven-segment ...

seven-segment display (Image courtesy of LXD, Inc.) In their natural state, liquid crystals line up with the orientation "rubbed" into the front and rear glass panels. The rubbings are microscopic ...