Posted on Feb 5, 2014

This counter uses a four-digit display, but with a flip of the range switch, it can display frequencies from 1 to 40 MHz, with a resolution of 100Hz. The MM74C926 CMOS IC contains a four-digit decimal counter that can latch a given count and then use this information to drive a 7 -segment, common-cathode multiplexed (MUX) display. The block diagram and schematic show the operation of the counter. Crystal-controlled timer U1 through U3 produces a 5-Hz square wave used for timing the frequency.

Click here to download the full size of the above Circuit.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Gibson Clavioline Keyboard Instrument (1953)
    Multimedia RIAA Preamplifier
    make this one transistor radio receiver
    pwm with microcontroller 8051 for scr
    Soldering Iron Tip Preserver
    AN7223 Am Tuner Fm/am If Amplifier Circuit For Radio Cassette Recorder Panasonic Semiconductor
    TLE6282 H-Bridge And Half Bridge Driver IC
    30W amplifier circuit
    INA105 circuit diagram of the basic power and signal connections