This circuit was suggested by National Semiconductor in one of its manuals. The LM108 integrated circuit, uncommon nowadays, can be replaced by an equivalent. The power supply must be symmetrical.
This circuit was found in English documentation from 1995. The circuit uses a period sensor and...
Found in a 1958’s publication, this receiver uses components that are nbot easy to find in our...
Using the 4046 PLL integrated circuit, this circuit generates signals from 60 Hz to 1.4 kHz via...