This circuit was found in a 1970s General Electric documentation. This circuit already used an emitting LED. The circuit operates at frequencies from 50 Hz to 50 kHz with short pulses
This VCO with a common operational amplifier was found in an old American documentation. The...
This regenerative circuit was found in a Japanese publication from the 1960s. Details of the coils...
This experimental monostable CMOS circuit, activating an LED was found in a documentation from the...