Seven-segment displays have been around for a long time ... [gzumwalt], and can use a single motor to cycle through all ten possible numbers. The trick lies in a synchronized pair of rotating ...

Vintage seven segment digits make up the display. These digits work the same ... Each coil can be powered using a single pin on the microcontroller. Similarly, the segments for each digit are ...

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 ...