7 segment 62 Articles . New PCB Revives Ancient Bubble LED Displays. June 11, 2019 by Ted Yapo 14 Comments . For those of us who remember LED calculators, the HP 5082-7400 series red “bubble” ...

Many options exist to drive seven-segment LED displays, but most are limited to low output currents. The approach described here uses one 74ALS374 or 74AS374 octal latch, wired as a shift register ...

In this case, the end product is a binary-to-seven-segment decoder built from scratch. In engineering circles, this circuit is better known as a 7447 BCD to seven-segment decoder/driver, ...