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Difference between revisions of "Kiln temperature controller"

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==General description==
 
==General description==
 
This circuit is intended to control a pottery oven. It uses the MAX6675 thermocouple-to-digital converter to measure oven temperatures. An oven schedule will consist of a list of (time, temperature) tuples. When started, the SX should work through the list of tuples and for each tuple:
 
This circuit is intended to control a pottery oven. It uses the MAX6675 thermocouple-to-digital converter to measure oven temperatures. An oven schedule will consist of a list of (time, temperature) tuples. When started, the SX should work through the list of tuples and for each tuple:
* change the temperature to the value given
+
* bring the oven temperature to the value given
 
* maintain that temperature for the time given
 
* maintain that temperature for the time given
  

Revision as of 07:53, 30 June 2009

General description

This circuit is intended to control a pottery oven. It uses the MAX6675 thermocouple-to-digital converter to measure oven temperatures. An oven schedule will consist of a list of (time, temperature) tuples. When started, the SX should work through the list of tuples and for each tuple:

  • bring the oven temperature to the value given
  • maintain that temperature for the time given

The circuit uses an LCD display, a rotary encoder, a small piezo speaker and two buttons for its user interface. The oven is controlled through relais. Since the oven will be in a shed and the users would like to monitor the ovens progress from home, the LCD display and speaker are wirelessly controlled through a 433Mhz transmitter/receiver pair. See the Wireless LCD display project (which is finished).

Project notes

Layout oven controller.jpg