Fan control temperature using sensor LM35

Basic circuit of the LM35 are made to control the fan is either used on amplifier that requires automatic cooling. Its use on power amplifier circuit above and only requires DC fan. From basic sensors based on ic and amplifier op-amp is added again to the transistor Q1 to drive the fan.

Fan control  temperature using sensor LM35 circuit diagram

Part List :

R1___220K

R2___100K

R3___3K3

R4___22K

R5___1M

R6___150R

R7___2K2

R8___33R 4W

C1___100pF

D1___1N4148

IC1__7915

IC2__TL072

IC3__LM35

F1___DC Fan 12V