Beepers: 21 Electronics Projects for the Timex/Sinclair 1000 and 1500 Publisher: McGraw-Hill Author(s): Gordon Rockmaker; Stephen Adams Date: 1984 Pages: 95 Read the book Easy-to-build electronic projects, including a numeric keypad and a shift-lock. Tags Books, McGraw-Hill, TS 1000, TS 1500 People Gordon Rockmaker, Stephen Adams
