This circuit, found in a 1977 documentation, indicates when the grid voltage goes through zero. Under these conditions, it produces an output pulse whose duration depends on the capacitor.
This oscillator can use inverters or connected AND or NAND gates as such. The signal produced with...
This circuit was found in a Radio Electronics magazine from November 1972. The circuit is based on an...
This timer for short intervals was found in a documentation from 1966. The transistor is made of...