Low cost temperature data logger using PIC and Processing. Marc's Public Blog - Linuxha - December 2009. If you are interested in this page, you should also refer to my later Temperature, moisture, humidity, and UV monitoring and graphing with 1wire devices, owfs, and cacti blog post.
Temperature logging I had basic temperature logging via the HAI RC-80 thermostat code I co-maintain which polls our thermostats for temperature (along with other settings like whether they are running). Other info on the RC-80 thermostat can be found here, just note that they cost about $50 used on Ebay. Our house is a little different from the average: we have a sub-zone in the master bedroom which is basically a second big vent going directly from the HVAC system to the bedroom. The bedroom has an RC-80 which turns on the HVAC system and opens the bypass vent when the master bedroom temperature needs to be adjusted, however there is still air going to the rest of the house too, but since a lot goes to the bedroom, it gets to temperature more quickly.
The RC-90 looks pretty simple HVAC zone board Findings. PICAXE Outside Temperature/INTERNET Project (Software) As with the previous PICAXE/server applications, getting the project up and running involves several areas: Configuring Apache for PHP, CGI scripts (Perl) and SHTML (server-side includes).Installing the serial port driver,Installing the CGI (Perl) scripts that acquire the PICAXE temperature data through the serial port,Configuring PHP for graphics, Installing the PHP code that generates the temperature graph,Loading the PICAXE program,Configuring Windows Scheduled Tasks to record the temperature readings, andIncorporating the generated text and graphs into a Webpage. 1.
Apache Configuration: Playground - OneWire. 1-Wire Temperature Control. Temperature Sensor LM35 + Serial Communication with ATMEGA16 « PAVAN's Blog. SENSOR: Linear + 10.0 mV/°C scale factor ADC Resolution 10bit (1024) reference voltage 5V => 5/1024 = 5mV approx As ADC results are in factor of 5mV and for 1 degree C the output of LM35 is 10mV, So 2 units of ADC = 1 degree.
Online Thermometer. Arduino makes a great building block for data acquisition and logging systems, including sensors commonly used in home automation such as temperature sensors.
By combining an Arduino and a few DS18B20 temperature sensors you can install sensors around your home or office and access an up-to-the-moment report using a web browser. Readings can also be logged and graphed over time, showing trends or measuring the effectiveness of your home heating or cooling system. By placing sensors outside the house, inside your ceiling cavity, and inside every room you can plot how well your home maintains its temperature when climate conditions change.
The information can also be used as part of the feedback loop for a control system such as to control active heating or cooling, or to trigger servos or linear actuators to open and close windows and passive ventilation systems. Parts Required Online Thermometer Schematic Download as JPG: online-thermometer-schematic.jpg Source Code Resources Errata Gallery. TPA81 Infra Red Thermal Sensor.
TPA81 Thermopile Array Technical Specification IntroductionThe TPA81 is a thermopile array detecting infra-red in the 2um-22um range.
This is the wavelength of radiant heat. The Pyro-electric sensors that are used commonly in burglar alarms and to switch on outside lights, detect infra-red in the same waveband. These Pyro-electric sensors can only detect a change in heat levels though - hence they are movement detectors. Although useful in robotics, their applications are limited as they are unable to detect and measure the temperature of a static heat source. Thermostat. Temperature Sensor + Arduino « DanielAndrade.net. Hello people, it’s been a while since I have posted projects on this website.
This semester was really busy, I didn’t have time to much else, but soon I will have my winter holiday (Here in south our summer holiday is from December to February). Today I am going to show you how to build a simple temperature sensor using one LM35 Precision Temperature Sensor and Arduino, so you can hookup on your future projects. The circuit will send serial information about the temperature so you can use on your computer, change the code as you will. I’m planning to build a temperature sensor with max/min + clock + LCD, and when I get it done, I will post here. Parts: Arduino (You can use other microcontroller, but then you will need to change the code).LM35 Precision Centigrade Temperature Sensor, you can get from any electronic store. Assembling: This is a quick and simple step. Down goes some pictures that may help you, click to enlarge: You can also download the .pde HERE. Anything just ask!!! Nursery Room Temperature Monitor «Lifelong Learning.
Temperature Monitor Indicating it's too warm Let me start by saying I found out a few weeks ago that I'm going to be a father. This is my first child and as you can imagine I'm filled with excitement and nervous energy. Both my wife and I both agreed that we wouldn't start actual preparations for the coming baby until the 12th week to ensure all was well (1 in 4 pregnancies end in miscarriage). I just couldn't sit still and wait, I started reading about what to expect, how to care for a newborn, and so forth. Electronics 23. Temperature sensors, thermocouples, thermistors, and power transistor heat design Silicon Temperature Sensors Temperature and heat play a large role in electronics. It's heat that makes PN junctions and transistors work, and gives us the relation I = Io exp (qV/kT) for the current across a forward-biased PN junction.
T is the absolute temperature, q the charge on the electron, and k Boltzmann's constant (the gas constant per molecule). kT/q = 25 mV at room temperature, and is called the thermal voltage. 3kT/2 is the average kinetic energy of a free molecule, and kT the average energy of a harmonic oscillator at temperature T. The absolute temperature T is usually measured in kelvin, K, and 0°C is 273.15K.