This is a very simple temperature controller circuit diagram which can be used any where to control the temperature with fan. The temperature sensor LM35 is used to sense the temperature and the controlling device is LM3914.
Above is the Circuit Schematic for Kitchen Fan Controller:-
In this project a Exhaust fan is being controlled which is an important component in kitchens. The project is a simple temperaature controller to control kitchen fans by monitoring the ambient temperature of kitchen regularly and give the commands to fan accordingly. The sensor or transducer used in this temperature controller is precision integrated temperature sensor chip LM35 (IC1). The decision to turn ON or OFF is done with the help of LM3914 the popular LED driver LM3914 (IC2).
The prset temperature input to the temperature controller is feeded through the switches.User can switch three presetted temperature levels using a jumper/slide switch (JP1), which determines the heat level to activate the relay and hence the electric exhaust fan wired through the relay contacts. It works off 12V DC power supply.
Only one adjustment is required in this kitchen exhaust fan controller circuit. After construction, set jumper point in its first position, ie base terminal of T1 is connected to pin 13 of IC2 and adjust the preset P1 carefully so that relay RL1 is energised when ambient temperature level reaches near 29oC. However this is not very critical as you can select any threshold level by connecting the jumper points to other unused output pins of IC2 (here only 3 outputs are used).
S: electroschematics.com/6319/kitchen-exhaust-fan-controller/
Above is the Circuit Schematic for Kitchen Fan Controller:-In this project a Exhaust fan is being controlled which is an important component in kitchens. The project is a simple temperaature controller to control kitchen fans by monitoring the ambient temperature of kitchen regularly and give the commands to fan accordingly. The sensor or transducer used in this temperature controller is precision integrated temperature sensor chip LM35 (IC1). The decision to turn ON or OFF is done with the help of LM3914 the popular LED driver LM3914 (IC2).
The prset temperature input to the temperature controller is feeded through the switches.User can switch three presetted temperature levels using a jumper/slide switch (JP1), which determines the heat level to activate the relay and hence the electric exhaust fan wired through the relay contacts. It works off 12V DC power supply.
Only one adjustment is required in this kitchen exhaust fan controller circuit. After construction, set jumper point in its first position, ie base terminal of T1 is connected to pin 13 of IC2 and adjust the preset P1 carefully so that relay RL1 is energised when ambient temperature level reaches near 29oC. However this is not very critical as you can select any threshold level by connecting the jumper points to other unused output pins of IC2 (here only 3 outputs are used).
S: electroschematics.com/6319/kitchen-exhaust-fan-controller/
0 comments:
Post a Comment