This circuit uses a PLL4046 oscillator to excite a piezoelectric ceramic. The circuit is from an October 1994 Electronics Now magazine.
This circuit is from a 1964 Electronic Design book that presents application ideas for...
Toshiba TCKE8xx eFuse IC Toshiba provides through Mouser Electronics circuits over current...
This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent...