Temperature activated switch - Electronic Circuits Projects Diagrams Free

kev*.avr · 27th October 2003, 06:23 AM

I am looking for a temperature activated switch / circuit.
The switch / probe must withstand a flame.

If the flame goes out, I would like it to close a circuit so an ignighter would fire up the flame.
And it should open the circuit when the heat reaches a pre-set temp.

kev*.avr · 28th October 2003, 06:50 PM

As soon as the temp probe fells heat it should switch off the power to the igniter cicuit.

:shock:

crust · 28th October 2003, 07:20 PM

I dont know of any parts that make a flame, but a quick look in a gas dryer should give some insight into how such a device might work. On mine, when it comes on, I see a piece of nichrome (like your stove element) get red hot. Then a click (which I suspect is the gas valve) and the gas passes near the glowing wire. The fire starts up and then the glowing wire extinguishes itself. There is also a sensor which determines when the fire goes out (thus leaking gas into the house), but I have never seen that happen on mine.

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27th October 2003, 06:23 AM	(permalink)
kev*.avr	Temperature activated switch I am looking for a temperature activated switch / circuit. The switch / probe must withstand a flame. If the flame goes out, I would like it to close a circuit so an ignighter would fire up the flame. And it should open the circuit when the heat reaches a pre-set temp.

28th October 2003, 06:50 PM	(permalink)
kev*.avr	Re-Temperature activated switch As soon as the temp probe fells heat it should switch off the power to the igniter cicuit. :shock:

28th October 2003, 07:20 PM	(permalink)
crust	I dont know of any parts that make a flame, but a quick look in a gas dryer should give some insight into how such a device might work. On mine, when it comes on, I see a piece of nichrome (like your stove element) get red hot. Then a click (which I suspect is the gas valve) and the gas passes near the glowing wire. The fire starts up and then the glowing wire extinguishes itself. There is also a sensor which determines when the fire goes out (thus leaking gas into the house), but I have never seen that happen on mine.