A Low-Cost 50MHz Frequency Meter
This new 50MHz Frequency Meter is autoranging and displays the frequency in either Hz, kHz or MHz. This makes the unit easy to read, as it automatically selects the correct range for any frequency between 0.1Hz and 50MHz and inserts the decimal point in the correct place for each reading.The design is easy to build too, since it uses a programmed PIC microcontroller to do all the clever stuff. Apart from that, there’s an LCD readout, a couple of low-cost ICs, two transistors, a 3-terminal regulator and a few sundry bits and pieces to complete the design.
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Measurement projects
