Circuit provides watchdog for microcontrollers


Posted on Jan 1, 2013

The watchdog circuit in Figure 1 uses a single NAND Schmitt-trigger IC. The circuit is more cost-effective than dedicated, commercially available watchdog ICs. The circuit generates an active-high reset signal upon power-up and remains in a low state as long as the control input receives pulses. Whenever the pulsing at the control input stops, whether the circuit is in a high or a low state, the circuit emits a reset signal.






Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Simple 3-6V LED Flasher
    Amplifier Timer Circuit Schematic
    microcontroller Driving low-voltage H-bridge directly from MCU
    OpAmp based Voltage Translator Ciruit for ADC of Micro-controller
    air flow sensor circuit
    Inverse Voltage Controlled Voltage Source
    555 audio oscillator circuit diagram of a radio-frequency drive
    Simple fourth gear dimmer switch circuit
    Secret High Power Free Energy Circuit (AEC)



    Top