Frequency Counter and Timer


Posted on Feb 6, 2014

In counter mode it provides 1Hz resolution up to 100Mhz. In timer mode maximum resolution is 0. 0000001 Hz up to 1Hz. Resolution is reduced by one digit for each additional decade. Multiple frequency updates per second by employing a sliding window for calculation. In case the AVR should be programmable in circuit, a few modifications must be made. In essence all


Frequency Counter and Timer
Click here to download the full size of the above Circuit.

third parties on wires used for programming are isolated using 47k resistors. The resistors in combination with Mega8 gate capacity create a low pass. This is software compensated using increased settling time for the external counter. This picture shows the test board with the full counter circuit except the 7 segment LEDs. Those are already mounted and soldered on a separate board. The wires on the top right connect to it. (One connector for digit selection and one for the actual 7 segment code. ) This is the final board that will be put into the device. It has connectors for power, 7 segment code, digit selection, in circuit programming and TTL signal input.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Liquid level control
    Microfarad Counter
    Bots Circuit Designs
    power supply How do I select the accompanying components for an optocoupler
    diac controlled led flasher
    Switch Timer For Bathroom Light
    60W Guitar Amplifiers
    8051 Development System Circuit Board 3
    Open Charge Regulator
    Phone to Microcontroller interfacing with DTMF
    Adjustable output voltage regulator circuit diagram



    Top