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Files

Schematic

Layout

Preview

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

PID Controller

PID Controller thumbnail