Industrial Temperature Controller


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This?practical temperature controller?controls the temperature of any device according to its requirement for any industrial application. It also displays the temperature on an LCD displays in the range of ?55?C to +125?C. At the heart of the circuit is the microcontroller from 8051 family which controls all its functions.

An IC DS1621 is used as temperature sensor. The DS1621 Digital Thermometer and Thermostat provides 9-bit temperature readings, which indicate the control of temperature of the device. User-defined temperature settings are stored in a nonvolatile memory EEPROM through microcontroller.

Maximum and minimum temperature settings are entered to the MC through a set of switches which are stored in the EEPROM -24C02.Maximum and minimum setting are meant for allowing any hysteresis necessary. Set button is used first and then the temperature setting by INC and then the enter button.

Similarly for the DEC button. A relay is driven from the MC through a transistor driver. The contact of the relay is used for the load, shown as a lamp in the circuit. For high power heater load a contactor may be used, the coil of which is operated by the relay contacts in place of the lamp as shown.

Standard power supply of 12 volt DC and 5 volt through a regulator are made from a step down transformer along with a bridge rectifier and filter capacitor.

Hardware Requirements

  • Transformer
  • Voltage regulator
  • Diodes
  • Capacitor
  • Resistors
  • Microcontroller
  • Temperature sensor (DS1621)
  • BC547
  • Relay
  • Lamp
  • LCD (16×2)

Software Requirements

  • Arduino IDE
  • Embedded C



Q.What is the validity of the course?
Ans: It will be valid till one month from date of registration.
Q. Will the course cover hardware description?
Ans: Yes. It will cover hardware too.
Q. How many times lectures can be watched?
Ans: You can access a video lecture n no. of times during validity of your course.
Q. Will I get the certificate after completion of my course?
Ans: Yes every candidate will be awarded with certificate of training within two weeks after completion.
Q. Can I use this website in my mobile phone?
Ans: Yes but pc mode will be preferable for better understanding.
Q. Can we learn from other user registration id?
Ans: No. because we will trace the IP address of your pc, laptop, mobile if it is found unmatched with the registered id, registration will cancelled automatically and user will debarred from all services including certification.
Q: Will we get software package.
Ans: Yes u will get software package before proceeding to tutorials with how to install notes.

Block Diagram