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Temperature sensor circuit diagrams
October 4, 2010
This circuit, enclosed into a small box, is placed in the fridge near the lamp (if any) or the opening. With the door closed the interior of the fridge is in the dark, the photo... [more]
circuit from:http://www.extremecircuits.net/2009/08/fridge-door-alarm-circuit_21.html
October 4, 2010
The circuit, enclosed in a small box, should be placed in the fridge near the lamp (if any) or close to the opening. With the door closed, the interior of the fridge is in dark,... [more]
circuit from:http://www.extremecircuits.net/2010/01/fridge-door-alarm-schematic-2nd-version.html
October 4, 2010
It beeps if the fridge door is left open for too long or hasn't closed properly, to stop food from spoiling. There are lots of other uses as well. A refrigerator or freezer door that... [more]
October 3, 2010
This circuit is intended to control a heating system or central heating plan, keeping constant indoor temperature in spite of wide range changes in the outdoor one. Two sensors are needed: one placed outdoors, in... [more]
circuit from:http://www.extremecircuits.net/2009/08/heating-system-thermostat-circuit.html
September 27, 2010
This sensitive circuit is basically a comparator, detecting very slight temperature changes in respect to the ambient temperature. It was primarily intended to detect draughts around doors and windows that cause energy leaks but can... [more]
circuit from:http://www.extremecircuits.net/2010/01/energy-leak-detector-circuit-diagram.html
September 27, 2010
It sounds rather mysterious: a switch that is controlled by its ambient temperature. All without the touch of a human hand, except for when you’re building this sort of electronic thermostat. There are a lot... [more]
circuit from:http://www.extremecircuits.net/2010/04/temperature-controlled-switch.html
April 23, 2010
The circuit is small regulatorof temperature, us warns for the increase of temperature. The control of temperature becomes from the thermistor TH1, that is negative factor. [more]
April 23, 2010
This circuit, is basically a resistance sensing window switch, except that the resistor takes the form of an NTC thermistor and the circuit thus responds to temperature. TH1 must have a resistance in the... [more]
April 11, 2010
This small thermostat allows you to select the size of its hysteresis. You can set both the temperature at which the relay will energize - and the temperature at which the relay will de-energize. The... [more]
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