This circuit operates at a voltage of 1.3 V from a single mercury cell. We found in an old documentation and for the components used the frequency is 500 kHz.
We found this circuit in a Radio Electronics from February 1970. The frequency of 1,400 kHz in the...
This circuit turns a relay on or off by touching the sensors or by connecting sensors at these...
In a microprocessor project (shield) for control applications, a triggered clock can be useful....