This CMOS generator with the 4018 IC was found in a November 1976 Radio Electronics magazine. It uses a 741 op-amp as the audio amplifier.
This CMOS Flasher was found in a Popular Electronics from 1978. It can still be easily assembled, as all...
In the figure we have the suggestion of coupling an audio oscillator to monitor the CW...
This double bench source has a fixed voltage output and an adjustable voltage output with current up...