They use a TM1637 LED driver and take 5 V. The height of the digits is 0.36” or 9.1 mm.
0.56''Inch TM1637 4Bit Digital LED 7Segment Clock Tube Display For Arduino Green
???????? 2pcs 1.8” inch 46mm 7-segment LED display with decimal point, large, big
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3pcs VFD Display Futaba 5-BT-11Z Vacuum Fluorescent Display 5 Digit VFD Green
Display Board Noritake Itron CU20029-T Display Wincor Nixdorf 301A PW-1058-101
Display Board Samsung 20L203DA3 Rev A Display Made in Korea USB
