The phasor is the ray weapon that we see in many science-fiction films. The characteristic sound can be imitated with this circuit found in Radio Electronics of the years 90.
Found in a magazine 73 for radio amateurs, this circuit has two settings, one for the interval and the...
This good quality amplifier found in a 1982 documentation has a traditional complementary output...
A low frequency divider can be made using common unijunction transistors as shown by the figure...