This time base circuit for the oscilloscope was obtained from an Electronics Now from the 90s. The circuit is intended to control the cathode ray tube of old oscilloscopes.
This 1995 circuit uses an audio amplifier that is no longer common today. However, other...
Found in a Popular Electronics from the 90s, this circuit uses common components with several...
This circuit is from the 80's but uses common components today. The relay is voltage sensitive...