Peltier Element Controls itself:  10/27/94 EDN-Design Ideas / (added 3/03) Peltier elements, or semiconductor heat pumps, combined with heat sinks are a designer's choice when controlled low temperature is required for CCDs and high-density ICs. These devices are suitable for device temperature cycling in reliability tests and for regular cooling. Because mounting inexpensive temperature sensors directly onto the controlled temperature surface isn't easy, a simple circuit (Fig 1b) provides the control. The circuit is successful because the Peltier element is a reciprocal device....   

Program Converts temperature from RTD sensor:  06/05/97 EDN-Design Ideas / (added 6/06)  

Resolving Very Small Temperature Differences with the LTC2402:  DN257  Design Notes (Linear Technology) (app note added 1/06)

RTDs provide differential temperature measurement:  12/21/00 EDN-Design Ideas / (added 2/06)  / PDF contains multiple circuits scroll to find this circuit

Selecting Temperature Transducers for Data Acquisition Systems (5988-7505en):  Aligent Application Note 1406 (added 4/08)

Self Powered Solar Box Furnace:  (electronic design added 9/02)

System monitors multiple temperatures Controls Fan speed:  10/12/00 EDN-Design Ideas / (added 6/06)

Taking the Uncertainty Out of Thermocouple Temperature Measurement:  AN-274 Analog Devices Application Note   (app note added 6/06)

Temperature Controlled NiCd Charger:  (electronic diagram added 6/03)

Temperature Controlled Ovens:  (diagram added 8/03)

Temperature Controller Based on AT89CX051:  (electronic circuit added 4/05)

Temperature controller has take back half convergence algorithm:  09/15/05 EDN Design Ideas  / (added 11/05)  Enhanced closed-loop control balances stability, responsiveness.

Temperature Controller keeps IR Detector at 8ºK #2:  01/07)/99 EDN-Design Ideas / (added 11/05) [Note:  File contains multiple circuits scroll to find this circuit]  Sensitive infrared array detectors must operate at a low temperature to avoid thermally generated dark current throughout the photoconductive elements. This requirement is particularly true for SiAs array detectors, which need cooling to near liquid-helium temperatures. Furthermore, the sensitivity of these detectors can be temperature-dependent. The optimal operating temperature for a long-wavelength IR camera is about 8ºK. This temperature must remain constant despite changes in the radiation level falling on the array, in the liquid helium level as it boils away, and in the orientation of the Dewar flask....

Temperature Controller Keeps IR Detector at 8ºK:  06/08/95 EDN-Design Ideas / (added 3/03)

Temperature controller saves energy:  02/03/05 EDN Design Ideas  / (added 5/05)  Given the high cost of electrical power, replacing a conventional on/off temperature control with a proportional controller can often save energy and money. Figure 1 shows a low-cost, high-efficiency, time-proportional temperature controller for a residential water heater. An Analog Devices ADT14, IC1, serves multiple functions as a temperature sensor, quad-setpoint, programmable analog tempe...

Temperature Data Logger:  (circuit / schematic design added 6/06)

Temperature monitor and fan controller reduce fan noise:  05/10/01 EDN-Design Ideas  / (added 2/06)

Temperature monitor measures three thermal zones:  12/11/03 EDN Design Ideas  /  (added 1/05)  You can use an ADT7461 single-channel temperature monitor; an ADG708 low-voltage, low-leakage CMOS 8-to-1 multiplexer; and three standard 2N3906 pnp transistors to measure the temperature of three separate remote thermal zones (Figure 1). Multiplexers have resistance, RON, associated with them; the channel matching and flatness of this resistance normally result in a varying temperature offset....

Temperature Monitor:  (diagram added 8/03)

Temperature Programmer uses Digital Control:  07)/18/96 EDN-Design Ideas / (added 3/03)

Temperature Regulator (intricate-ms):  (diagram added 8/03)

Temperature Sensitive Oscillator:  Temperature controlled based on AT89CX051 (added 8/03)

Thermo Cooling Fan:  fan controller, which controls fan based on temperature (added 5/02)

Thermocouple Signal Conditioning Using the AD594/AD595:  AN-369 Analog Devices Application Note   (app note added 6/06)   This application note reviews thermocouple basics and illustrates circuit designs for thermocouple signal conditioning using the AD594/AD595.

Thermoelectric Controller (scriptable Thermometer):  A unified thermometric controller that can be programmed with simple scripts, integrating the "classic" thermometer/controller pair. You can build a variety of simple machines with the same hardware and a different script : a charting thermometer, a vending machine that dials your number when empty, a leavening cell....   (added 09/05)

Thermostat for 1KW Space Heater (SCR controlled):  Here is a simple thermostat circuit that can be used to control a relay and supply power to a small space heater through the relay contacts. The relay contacts should be rated above the current requirements for the heater. Temperature changes are detected by a (1.7K @ 70F) thermistor placed in series with a 5K potentiometer which produces about 50 millivolts per degree F at the input of the LM339 voltage comparator. The two 1K resistors connected to pin 7 set the reference voltage at half the supply voltage and the hysteresis range to about 3 degrees or 150 millivolts. The hysteresis range (temperature range where the relay engages and disengages) can be adjusted with the 10K resistor between pins 1 and 7. A higher value will narrow the range....   (added 10/05)