We found this circuit in the October 1994 issue of Electronics Now magazine. The circuit uses a now-uncommon 4046 PLL and the gates of a CMOS 4001.
This circuit trips by shorting the load to quickly blow the fuse when the voltage exceeds a...
Epson SG 8018 Epson Crystal Programmable Oscillators Available from Mouser Electronics, these...
This circuit works with the previous two by demodulating the signals received modulated in FM. The...