Cool Fan Controller Circuit Diagram

When the pc is connected the speed rotation of the fan will be pretty high because of c1 but will decrease at a minimum value.

Fan controller circuit diagram. Pwm technique is used in controlling the speed of dc motor. Capacitor c1 is connected in parallel to the fan to stabilize its speed. Measure with a thermometer the air temperature close to the sensor.

Figure 2 automatic fan controller circuit diagram. The circuit is based on good old 555 timer ic. The output of the multivibrator is fed to irf 540 mosfet.

The other end of pot is left open. A 10kω pot is connected between supply and pin 7 with wiper of the pot connected to pin 7. Dc fan speed regulator project.

Pins 8 and 4 v and gnd of lm358 are connected to 5v and gnd. Pin 1 is connected to ground. The period 3rd pin 1 no voltage pin 7 has voltage due to causes each 3 case because lm334z has to change at vout there are.

The fan is connected to the positive terminal of the battery and drain d of mosfet t1. The circuit diagram of dc fan motor speed controller regulator circuit using 555. The key component of this temperature controlled fan circuit is thermistor which has been used to detect the rise in temperature thermistor is temperature sensitive resistor whose resistance changes according to the temperature there are two types of thermistor ntc negative temperature co efficient and ptc positive temperature co efficient we are using a ntc type thermistor.

Circuit design of pc fan controller. It is configured as an astable multivibrator. A fuse is included for protection.