|
Digital Remote Thermometer - This circuit is intended for precision centigrade
temperature measurement, with a transmitter section converting to frequency the
sensor's output voltage, which is proportional to the measured temperature. The output
frequency bursts are conveyed into the mains supply cables. The receiver section
counts the bursts coming from mains supply and shows the counting on three 7-segment
LED displays. The least significant digit displays tenths of degree and then a 00.0 to
99.9 °C range is obtained. Transmitter-receiver distance can reach hundred meters,
provided both units are connected to the mains supply within the control of the same
light-meter. ….(circuit design added 11/08) |
|
|
|
Digital Remote Thermometer (pg11) - Remote sensor sends data via mains supply
Temperature range:00.0 to 99.9 °C (added 9/04) |
|
Digital Thermostat with LED Temperature Display - I needed to replace two old,
unreliable thermostats for controlling the heating and cooling for a large garden
shed. Commercial basic digital thermostats are available quite cheaply, but some lack
the ability to control heavy loads or have the extra features that I require for
saving energy when the door is often left open or to indicate temperature being out of
range etc. I like the PIC18F1320 microcontroller used in my previous project, so
decided to use it again in a very similar design to drive three multiplexed LED
displays and read the temperature from a Dallas/Maxim DS18x20 "1-Wire" digital sensor.
….(design added 11/08) |
|
DS1821 Programmable Thermostat - (app note added 04/05) |
|
|
|
|
|
Energy Leak Detector - High sensitivity, portable thermo-comparator. Detects
draughts around doors, windows, etc. (added 3/05) |
|
Freezer Over-Temperature Alarm - This electronic hobby circuit below is designed
to activate a beeper alarm, whenever the outside air temperature is below 0 degrees C
(32F). A 9v battery powers the hobby circuit. The average 9ua current is
so low that the battery should last for many years.... ….(designed by David A.
Johnson) |
|
Freezing Temperature Alarm - This circuit turns on a beeper whenever the outside
air temperature is less than zero degrees Centigrade. The circuit draws only a
few microamps from a 9 volt battery. It uses a glass bead thermistor accurate to
1 degree C. ….(designed by David A. Johnson) |
|
Hot Water Tank Indicator - (electronic Schematic added 02/05) |
|
IC & DMM form direct read out temperature probe - 09/01/06 EDN-Design Ideas:
Simple circuit yields linear voltage-versus-temperature output.....(design ideadadded
05/06/07) |
|
IC Diodes help Deduce Junction Temperature - 07/07/94 EDN-Design Ideas: A simple
method for directly measuring an IC's temperature uses the device's input-protection
diodes as temperature sensors. Static-discharge protection diodes are common features
in many modern IC input structures, and their location on the IC makes them ideal as
noninvasive temperature sensors.....(design idea added 3/03) |
|
IC Removes Nonlinear Temperature Effects - 09/25/03 EDN-Design Ideas: A common
technique for removing nonlinear temperature-related effects from a dc voltage is to
incorporate a temperature sensor that a microprocessor samples via an A/D converter.
The processor determines—by mathematical calculation or a temperature-indexed
look-up.....(design idea added 10/03) |
|
IC Temperature Sensor Accuracy Compensation with a PICmicro MicroController -
Microchip Application Note Published 14-Nov-05 (app note added 2/06) |
|
Implementing an I2C® Reset - AN-686 Analog Devices Application Notes (app
note added 2/06) |
|
Implementing Ohmmeter/Temperature Sensor - Microchip Application Note Published
26-Aug-97 (app note added 2/06) |
|
Inductively Coupled Thermistor - Microchip Application Note Published 21-Jul-02
(app note added 2/06) |
|
Intelligent Thermal Management using Brushless DC Fans - Microchip Application
Note Published 24-Feb-03 (app note added 2/06) |
|
Interfacing a MCP9700 Analog Temperature Sensor to a PICmicro MicroController -
Microchip Application Note Published 1-Apr-05 (app note added 2/06) |
|
Interfacing the AD22100 Temperature Sensor to a Low Cost Single-Chip MicroController
- AN-395 Analog Devices Application Notes (app note added 2/06) The
AD22100 is a new monolithic silicon temperature sensor with several unique attributes.
These attributes make it easier to interface the AD22100 to microcontrol-lers than
other temperature sensor ICs. |
|
Interfacing the MCP9100% I2C Digital Temperature Sensor to a PICmicro MicroController
- Microchip Application Note Published 16-May-05 (app note added 04/05/06) |
|
Interfacing the TC1047A Analog Output Temperature Sensor to a PICmicro®
MicroController - Microchip Application Note Published 22-Feb-05 (app note
added 2/06) |
|
Interfacing the TC72 SPI™ Digital Temperature Sensor to a PICmicro® MCU -
Microchip Application Note Published 16-Aug-04 (app note added 2/06) |
|
Interfacing the TC77 Thermal Sensor to a PICmicro® MicroController - Microchip
Application Note Published 3-Mar-04 (app note added 2/06) |
|
IR Digital Thermostat for FAN - This circuit measures temperature in Celsius scale
and displays it on an alphanumeric LCD screen When temperature rise to 40 C an alarm
is activated and at the same time a relay is also activated which drives a fan to keep
the temperature at a level.....(design idea circuit added 09/08) |
|
|
|
|
|
|
|
LCD thermometer 1 - Build your own temperature meter for fun. This project uses
the Microchip TC77 digital temperature sensor, a PIC16F871 microcontroller and a
7-segment 3˝ digit LCD. You can study the source code on how to drive an LCD
display…..(design added 02/09) |
|
LDO Thermal Considerations - Microchip Application Note Published 12-Nov-02
(app note added 2/06) |
|
Linearized NTC Thermistor - ...(spice design added 02/09) |
|
Link Neatly Measures Temperature - 10/26/00 EDN-Design Ideas:.....(design idea
added 06/03) |
|
LTC1392 Monitors System Temperature & Multiple Supply Voltages & Currents - DN149
Design Notes (Linear Technology) (app note added 1/06) |
|
LTC1392: Temperature & Voltage Measurement in a Single Chip - DN106 Design
Notes (Linear Technology) (app note added 1/06) |
