Thermometer Electronic Circuits

Thermometer Circuits
Last Updated on: Saturday, June 27, 2009 04:43 PM

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

AN-18: Thermometer Applications of the REF-02: AN-18 - Analog Devices Application Note (app note added 2/06)

AT89C2051 Digital Thermometer and Clock: (electronic diagram added 6/03)

Celsius to digital thermometer Works with remote sensor: 04/15/04 EDN Design Ideas / (added 1/05) You can use a single-supply system to precisely measure the temperature at a remote location with less than 1°C error over a 0 to 100°C range (Figure 1). The circuit includes T1, a low-cost AD590 temperature sensor; IC1, an AD8541 rail-to-rail amplifier; four resistors; a trimming potentiometer; and an ADC....

LB-27: Micropower Thermometer: National Semiconductor - Application Note (app note added 2/06)

LCD Thermometer: (app note added 8/03)

LTC1392: Temperature and Voltage Measurement in a Single Chip: DN106 - Design Notes (Linear Technology) (app note added 1/06)

Micropower Thermometer: National Semiconductor - Application Note (app note added 2/06)

PC Based thermometer Based on Dallas DS1621: (electronic circuit added 4/05)

PC Thermometer #2: (electronic circuit added 09/05)

Quartz crystal based remote thermometer features direct Celsius readout: 03/17/05 EDN Design Ideas / (added 5/05) Although quartz crystals have served as temperature sensors, designers haven't taken advantage of the technology because few manufacturers offer the sensors as standard products (references 1 and 2). In contrast to conventional resistance- or semiconductor-based sensors, a quartz-based sensor provides inherently digital-signal conditioning, good stability, and a direct digital ou...

Temperature and Voltage Measurement in a Single Chip (LTC1392): DN106 - Design Notes (Linear Technology) (app note added 1/06)

Temperature Controller: Remote sensor sends data via mains supply Temperature range:00.0 to 99.9 °C (added 9/04)

Thermocouple Interfaces to Serial Port: 11/09/95 EDN-Design Ideas / (added 3/03) The circuit in Figure 1 acquires temperature data via an IBM PC serial port using a thermocouple-based sensor. The sensor is a type-K (chromel-alumel) thermocouple. When in contact, the dissimilar metals produce a potential difference that is a function of temperature. Additional thermocouple junctions form where the chromel and alumel make contact with the copper connections of the signal-conditioning circuitry. Thermocouple measurements are inherently differential. Placing the incidental (chromel- and alumel-copper) thermocouple junctions in an ice bath traditionally maintains the reference junction.....

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 6/06)

Thermometer Applications of the REF-02: AN-18 - Analog Devices Application Note (app note added 2/06)

Transistor Forms RS-232C Digital Thermometer: 05/09/96 EDN-Design Ideas / (added 6/06) An ordinary transistor can serve as an uncalibrated temperature sensor (Figure 1) for an accurate, PC-compatible thermometer. Unadjusted accuracy is more than 0.5°:C over the -50 to +50°C range, and the only limitation on resolution is the time devoted to measurement acquisition. For example, 0.1°:C resolution requires less than 1 sec. The thermometer derives all its power from the RS-232C COM port. Therefore, a laptop computer running a simple data-logging program yields an inexpensive, portable temperature-logging system....