This circuit can be used with 5 to 15 V sources and the zener diode must be chosen according to the trip voltage of the protector. The circuit blows the fuse when the voltage exceeds the zener value.
This astable multivibrator has an active cycle of 30,000: 1. We found it in a 1970 EEE. The...
Found in the June 1987 issue of Radio Electronics magazine, this circuit uses well-known CMOS...
This circuit with increased power output was found in the November 1974 Radio Electronics...