More inputs can be added to this adder that we found in the January 1995 Electronics Now magazine. Other operational ones can be used.
This egg timer has been found in an English magazine that no longer exists in 1982. The...
This circuito from the 1977 GE Semiconductor Manual circuit provides timings from 0 to 90 seconds...
This crystal-controlled circuit was obtained from a 1980s documentation. The power supply should be 5...