Temperature_operated_relay_for_soldering_iron_furnace_etc

Published:2009/7/20 5:52:00 Author:Jessie | From:SeekIC

Temperature-operated relay for soldering iron, furnace, etc. This circuit will control the temperature at thermistor R1 within 1°over the temperature range of 20°F to t 50°F. For other temperature ranges change R1; it should have about 1000 ohms resistance in the center of the desired control range. Pl can be substituted with other types of sensing devices (e.g., photo resistor). By using K1 to operate a large contactor heavier loads can be controlled. As is, K1 is rated for 5 amperes (courtesy General Electric Company).



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