Showing posts with label fan. Show all posts
Showing posts with label fan. Show all posts
Saturday, November 16, 2013
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.
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
Friday, October 25, 2013
Fan stopped when no audio input
Circuit which is also equipped with temperature sensors would protect the high temperature. However, in the above circuit which necessiatated the input of the amplifier / audio signal. The way it works is , if the amplifier circuit to work and ouput signal to be connected to this circuit , Fan 12V will work well. If the received audio signal this circuit does not exist , then the fan 12V die. And automatic circuit amplifier also not work and does not require refrigeration.
R1_________________220K
R2,R9,R10,12,13_____100K
R3_________________2K4
R4_________________22K
R5_________________1M
R6_________________150R
R7_________________2K2
R8_________________33R 4W
R11________________10K
C1_________________100pF
C2_________________47uF 25V
C3_________________100uF 25V
D1,D2______________1N4148
Q1_________________MJE350
Q2_________________MPSA42
IC1________________7915
IC2________________LM35
F1_________________Fan 12 Volt
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