This circuit was obtained from an American 1980s documentation. The frequency depends on the crystal and the circuit may be a PNP that reaches the generated frequency.
This circuit was found in Maxim documentation from the 1990s. The RC circuit determines the...
This Vienna bridge multi-band oscillator circuit was found in a 1974 Ferranti transistor manual. The...
This circuit can be used as a shield to control the matrix flow of 100 LEDs from a single output of...