digital step km counter with

Posted on Feb 5, 2014

This circuit measures the distance covered during a walk. Hardware is located in a small box slipped in pants` pocket and the display is conceived in the following manner: the leftmost display D2 (the most significant digit) shows 0 to 9 Km. and its dot is always on to separate Km. from hm. The rightmost display D1 (the least significant digit) sh

digital step km counter with
Click here to download the full size of the above Circuit.

ows hundreds meters and its dot illuminates after every 50 meters of walking. A beeper (excludable), signals each count unit, occurring every two steps. A normal step was calculated to span around 78 centimeters, thus the LED signaling 50 meters illuminates after 64 steps (or 32 operations of the mercury switch), the display indicates 100 meters after 128 steps and so on. For low battery consumption the display illuminates only on request, pushing on P2. Accidental reset of the counters is avoided because to reset the circuit both pushbuttons must be operated together. Obviously, this is not a precision meter, but its approximation degree was found good for this kind of device. In any case, the most critical thing to do is the correct placement of the mercury switch inside of the box and the setting of its sloping degree

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Basic 2051`s Circuit
    Low power temperature controller
    CMOS Toggle Flip Flop Switch
    Metal Detector
    how to make remote control circuit from
    subwoofer amplifier for computer
    xr2206 function generator
    Solar-Powered High Efficiency Battery Charger
    10W Audio Amplifier with Bass-boost
    STK4040x1 made HI-FI amplifier circuit
    General Purpose Amplifier circuit diagram
    Construction 25W single-ended Class A tube amp circuit diagram EL156
    Light emitting diode circuit of the temperature control