Indicated for applications in the analysis of logic circuits, this circuit was found in 90s Radio Electronics. The circuit generates pulses from 5 to 200 Hz.
This is an old test circuit for integrated TTL counters, feeding a Nixie tube, common at the time....
This traditional crystal radio circuit, but which has a modern version with diode, was found in an...
This headphone amplifier using a pickup coil can be used as an extension for devices such as TVs,...