audible logic probe


Posted on Feb 5, 2014

When testing circuits with a logic probe, it is sometimes difficult to watch the LEDS on the probe to determine the logic state. With this probe the logic states are audible. This probe is designed for TTL circuits only but could be modified for CMOS. The way it works is as follows. The 5 volt power source will be the circuit under test. Clip the


audible logic probe
Click here to download the full size of the above Circuit.

ground input of the probe to the ground of the circuit being tested. The other input lead is used to probe the different chips of the circuit being tested. Any input greater then 2 volts will be high and output a high tone through the speaker. Any input less then. 8 volts will be low and produce a low tone through the speaker.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    S1Ngle-Ic Logic Probe
    Inexpensive Vhf/Uhf Diode Rf Switch
    making multi function water level
    dev board
    prepaid energy meter at89s52
    plant watering watcher dry soil detector
    60watt rf radio frequency
    Icom IC-751 (IC 751 IC751) transceiver mods reviews software and diagrams
    HR Diemen
    Logic Probe Plans
    Balanced mixer circuit consisting of two dual-gate field effect transistor formed



    Top