! TTL IC ,番号,説明 ,7442,BCD-to-Decimal Decoder ,7447,BCD TO 7-SEGMENT DECODER/DRIVERS ---- 一覧 https://www.chip1stop.com/sp/knowledge/047_general-purpose-logic-ic-function-table ---- ! 7Seg Driver ( 1Chip) TM1637 http://akizukidenshi.com/catalog/g/gI-13224/ https://github.com/avishorp/TM1637