Found in a 90’s Popular Electronics, this circuit uses two CMOS inverters to generate a signal of a few hundred hertz determined by C1 and the R3 setting.
This power supply was found in a RCA publication from the 1970s. The circuit uses transistors from that...
This very high input impedance preamplifier is from a publication of 1977 but can also be mounted...
This circuit was found in an Electronic World of 1968. The circuit uses power transistors of the...