The circuit shown in the figure below is from the 1993 Linear Technology Applications. The operational ones used are uncommon and the use of equivalents can be analyzed.
What this circuit does is to agitate a servo at a frequency of 0.25 Hz, which can be used in...
This circuit is suitable for SSB modulation and was obtained from an amateur radio documentation from...
This telegraphy circuit generates an audio tone from a pure RF carrier. We found it in a...