temperature control circuit

Discussion in 'General Electronics Chat' started by brendyboy, Mar 28, 2006.

  1. brendyboy

    Thread Starter Member

    Dec 21, 2005
    Hi there

    I currently have a temperature control circuit http://www.quasarelectronics.com/1048.htm which has a temperature range of +20 to 70 degrees, however I am looking at adapting it so that the relay can switch when the temperature gets in a range of around 2-8 degrees.
    Is it just a case of changing the potentiometer, i currently have replaced it with a 4k7 which seemed to do something but i couldnt quite get the relay to switch correctly.

    I would appreciate any help.
    Many thanks