Found elsewhere in this section, this circuit mimics the noise of a steam locomotive. This was obtained from an Electronics Today International of the 1980s.
This audio-driven relay was published in the July 1977 issue of Radio Electronics magazine. The...
This circuit can be used for signaling a panel with a common incandescent lamp. The lamp will...
This crystal oscillator is indicated for the calibration of IF steps of common radio receivers. The...