The frequency of this Pierce oscillator, found in 1969 documentation, depends on the crystal. The current in the drain is about 500 uA. Crystals from other frequencies can be used.
This circuit was found in a 1968’s publication and uses germanium transistors. Equivalents can be...
I found this circuit in an article in a 2003 publication. The circuit is an example of how to...
This 40-second timer uses common components. The output can be used to excite a power stage. With...