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:

New Circuits



Popular Circuits

187 KHz RF oscillator
oscillator HEF4060B counter doesnt count
Keypad Scan
modifying fm transmitter circuit 3
Pearl CH-02 Chorus Schematic Diagram
Domestic Seismic Alarm