This circuit uses a PLL4046 oscillator to excite a piezoelectric ceramic. The circuit is from an October 1994 Electronics Now magazine.
This 8-channel converter was found in a 1970s American documentation. The integrated circuits used are...
This circuit was found in an old publication and operates in the 455 kHz IF band since the...
This circuit implements a 3-way control, with outputs in A, B and C, using CMOS integrated...