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Files

Schematic

Layout

3D View

1N4007
Thermistor
Optocoupler
R7
Resistance
120 Ω
R1
Resistance
200000 Ω
External 5V power source for alarm buzzer.
R3
Resistance
330 Ω
Voltage divider for Thermistor.
RC circuit to convert PWM signal to analogue.
2N2222
+5 V

PID Controller

PID Controller thumbnail