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

    InfraRed Detector (PIC12F629)
    Wireless doorbell 300MHz
    Amplified Noise Limiter For Sw Receivers Circuit
    Flash light Timers
    Toy Motor Drivers
    fog lamp sensor circuit
    LCD Module in 4-bit Mode
    Basic Multimeter Circuit
    Color Mirror Screw Project
    A muting delay & DC offset protection circuit
    Pic microcontroller project
    DC panel battery uninterrupted power supply switching circuit