This timer was found in English documentation from the 80's. The integrated circuit is common nowadays and the MOSFET admits equivalent according to the controlled load.
This circuit was found in the November 1992 issue of Radio Electronics magazine. It uses...
This multivibrator has its frequency controlled by a crystal. Other frequencies can be generated by...
We found this preamplifier circuit with high input resistance, on the order of 30 M ohms, in an...