The circuits illustrated below can be used to measure an AC line frequency using the LM2917 frequency-to-voltage converter and DATEL’s DMS Series digital voltmeters. The circuit in Figure 1 is used to ...
How do you test the oscillator circuit you just made that runs between 200MHz and 380MHz if all you have is a 100MHz oscilloscope, a few multimeters and a DC power supply? One answer is to put away ...
This sound frequency meter circuit is simple to build and can be constructed in a portable format. In can measure frequencies with a minimum level of 10 mVrms and a maximum frequency of up to 100kHz.
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