temperature control circuit

Replies

• 

  gohm

  Have you attempted to diagram yourselves yet? Any electrical students on your team?
• 

  ashuashi

  temperaturehelp

  I have project in which i have to create a soultion which will mantain the temperature of a living space with a volume of 400m3 between 25-30 degrees centigrade.
  
  I can use the following components
  
  lm35 TEMPERATURE SENSOR
  lm358 Operational amplifer
  3 X lm311 compararators
  74ls32 Quad OR Gate
  74ls04 Hew NOT Gate
  2 X 12 Volt Relays
  
  If anybody could design us a circuit diagram this would be great!!! many thanks my friends

  Hey Dear,
  
  Control of temperature will depend on various parameters.
  
  1. What is the ambient temperature. Its variations in summers & winters or the whole year.
  
  2. Do you need to cool the space or heat the space.
  
  3. What will you use to cool/heat the space.
  
  4. Are you aware of PID controls.
  
  Sorry to bombard you with questions. But these are important points required to control the temperature
• 

  raithrovers1

  I would probably start by saying you have two 12 volt relays. I would guess that these will control your output circuit.
  If the temperature goes above 30 degrees then you will have to figure out how to send a 12 volt signal to the relay which will then turn on the cold air.
  Also if the temperature goes below 25 degrees you send a 12V signal to the other relay which will switch on the heating.
  All the other components are used to convert the small signal that the temperature sensor gives out to a 12v signal that switches on and off when required.
  
  For any UPS or power needs please contact #-Link-Snipped-#