This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
This circuit monitors the current in the negative line. The circuit is from a 2005 Linear...
This 80's circuit uses a germanium transistor like the AC121. The circuit has an output...
This ultra-low power metronome was found in a 1991 documentation. The output transistor is general...