ANALOG_WATCHDOG.SchDoc

hardware circuit simulator — click any node to probe voltage

MCU RUNNING
schematic view
① PULSE INPUT ② RC INTEGRATOR ③ COMPARATOR IC4 ④ RELAY K1 MCU GPIO 10 Hz R66 220Ω Q12 +5V D5 GND C28 3.3µF GND R64 150kΩ C29 3.3µF GND IC4 DUAL OP-AMP VINA+ VINA- VSS VOUTA VDD R63 +5V R65 GND Q14 K1 RELAY NC — CLOSED VCC D6 GND SHUTDOWN CIRCUIT — OK ① PULSE INPUT CH.2 ② RC INTEGRATOR CH.2 MCU GPIO 2A 10 Hz R111 220Ω Q18/Q13 +5V GND C31 3.3µF GND R70 150kΩ C32 3.3µF GND VINB+ ⑤ OPTOCOUPLER FEEDBACK TCMT1103 OPTOCOUPLER isolation R_FEEBACK → MCU R73/R77 MCU FEEDBACK INPUT GPIO CAP VREF CMP COIL OUT CAP2 0.00 V
simulation controls
10.0 Hz
0.50 s
2.50 V
5.0 V
voltage probes
← Click any node on the schematic to probe its voltage