Low-frequency-tachometer


Posted on Feb 6, 2014

This tachometer lets you measure heartbeats, respiratory rates, and other low-frequency events that recur at intervals of 0.33 to 40.96 seconds. The circuit senses the period offm, computes the equivalent pulses per minute, and updates the LCD accordingly. Although the decimal readout equals 60 fm, the circuit doesn`t actually produce a frequency of 60 fm. The computation involves counting and comparison techniques and takes 0. 33 seconds


Low-frequency-tachometer
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Video-gain-block
    Two-Door Annunciator
    Auto Alarm
    Electrolytic Capacitor Reforming Circuit
    Studio of Bill Ooms Computerized Ornamental Lathe
    Modular Burglar Alarm Project
    LF353 JFET-INPUTDUAL OPERATIONAL AMPLIFIER
    Micropower thermometer
    Machine magnechuck under current protection circuit diagram



    Top