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PROJECT DESCRIPTION

This practical temperature controller controls the temperature of any device according to its requirement for any industrial applications. It also displays the temperature on an LCD in the range of –55°C to +125°C. A microcontroller of the 8051 family that controls all its functions is the heart of this project circuit. IC DS1621 is used as temperature sensor that provides 9-bit temperature readings, for the microcontroller input.

User-defined temperature settings are stored in nonvolatile memory EEPROM through 8051 series microcontroller. The maximum and minimum temperature settings are stored in EEPROM -24C02 entered to the MC through a set of switches. Maximum and minimum settings are meant for allowing any hysteresis necessary. Relay is driven from MC through transistor driver.

The contacts of the relay is used for load, shown as lamp in the circuit. For high-power heater load a contactor may be used – the coil of which is to be operated by relay contacts in place of lamp as shown.

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

 

PROJECT HIGHLIGHTS
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
Industrial Programmable Temperature Controller.
Call/mail for Tech Support from 10 am - 7 pm.
Can be Customized for Arduino, Raspberry Pi, PIC
BLOCK DIAGRAM
Programmable Digital Temperature Controller
Hardware Requirements
  • Transformer
  • Voltage regulator
  • Diodes
  • Capacitor
  • Resistors
  • Microcontroller (AT89S52)
  • Temperature sensor (DS1621)
  • BC547
  • Relay
  • Lamp
  • LCD (16x2)
Software Requirements
  • Keil compiler
  • Embedded C
Q & A
Q:  Which microcontroller is used in this project?
A:  The microcontroller used in this project is a 40 pin IC from 8051 family.
Q:  Will it sense the body temperature or surrounding?
A:  This project is used to sense the surrounding temperature for incubators.
Q:  What is the temperature sensor is used in this project?
A:  Temperature sensor used is IC DS1621
Q:  How to set the temperature?
A:  Using push button and operation procedure provided with the kit, one can set the temperature.
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