E)
This circuit uses a reversible double contact relay to obtain the trigger lock with the unijunction pulse. The relay must be of the sensitive type with at least 150 ohms of coil.
Found in American documentation from the 1990s, this circuit generates signals in the 350 to 500...
This instrument was obtained in a documentation for radio amateurs of 1976. The circuit measures...
This circuit was suggested by Motorola in 1980s documentation. The circuit employs an operational of...