Hello all,
I am very new to electronics and need to build a simple 12V dc circuit, which will keep a heater mat at a fixed temperature... ie switch it on and off depending on tempterature. I guess I need a device that measures the temperature and opens a switch when that temperature is reached. Is there an electronic device that will do that?
Thanks Alex
The simplest way may be to get a heating pad and use its electronics to control your mat. As long as the heating pad uses a simple on/off series switch to control the temperature then it should work.
Bob
Hello Alex I am Phuong I can answer your question with my idea: If you need a device that measures the temp and opens a switch when that temperature is reached.I think the simple you should use the microcontroller with AD converter as AVR,PIC or 8051 +AD0804.It so easy to programming that you need.If you interested in this ,pls email for me : snipped-for-privacy@gmail.com
I have friend who makes a temperature-regulated silicone heater mat. It used a simple IC and a power MOSFET. It was the LM56 low power thermostat. You can contact him at
A good primer on temp control is:
Also National's Temperature Sensor Handbook (which describes the LM56):
Some other sensors are LM34, LM75, LM86 and LM134, or you can look at some chips from Maxim:
Paul
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