Found in a 1967 American electronics magazine, this circuit has an input impedance of 2000 ohms. The circuit can be built with modern equivalent transistors.
This circuit is from a Radio Electronics from 1950. The transistor was still new and called a...
This low power metronome produces pulses in a small loudspeaker. Pule rate is adjusted by P1 and...
Found in 1967 General Electric documentation this circuit appears elsewhere in this section. SCRs are...