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

    8 Note Tune Player
    Signal-combiner
    Sine- And Square-Wave Ttl Oscillator
    clap sensor construction
    low frequency oscillator
    Field-strength meters
    Enhanced 4 Digit Alarm Keypad
    Joule Ringer 3
    PCB exposure box Based on ATmega8 AVR microcontroller
    Jog shuttle function with automatic control circuit



    Top