7-day timericontroller - a micro computer controlled time switch

7-day timer/controller Elektor April 1983 The last time we published a single-chip programmable timer was way back in May 1979 and the circuit became very popular (and still is). However, the IC used at the time is now a little "thin on the ground" and it"s about time the subject was brought up to date. The circuit here uses the TMS 1601 from Texas Instruments, a single-chip microcomputer specifically designed for this purpose. It doesn"t, as the subtitle may suggest, actually stop and start time itself (that article will be published in an earlier issue) but it will do almost anything else. Sophistication doesn"t end there either. The front panel that is available from the EPS service also contains the keyboard, consisting of built-in membrane switches. This represents another first for Elektor and gives the finished project a very professional appearance. 7-day timer/controller a micro computer controlled time switch The TMS 1601 timer/controller IC from Texas Instruments forms ...