This project is one of many others I had made to control my house with rules, web interface, logger and many more. This project could take several measurements: Temperature/Humidity/Barometric pressure measurements. All measurements are taken digitally and have their own dedicated A/D converter in each sensor. It’s a REAL digital environment sensor WITHOUT any calibration.
Digital Temperature, Humidity, Barometric Pressure Sensor – [Link]
Sensirion’s SHT series of humidity sensors provide fully calibrated digital readings for relative humidity and temperature. This tutorial explains how to interface two of these sensors (SHT11 and SHT75) to PIC microcontroller.
I took this project on as a present for my girlfriend, who, during the colder months, is more or less addicted to coffee/hot chocolate/tea. Her mug broke, and I was just going to get a new one for her birthday, but I wanted to add a little functionality to it. The new mug now senses and displays the relative temperature of its contents on a 10-LED blue bar display and has a rechargeable battery, which is charged through a 5.0V DC jack. Turned out pretty well, although it reacts a tad slow to temperature changes, as you can see in the video.
Coffee mug with temperature indicator – [Link]
Consisting of 2 circuits
One reads the temperature using a DS18B20 and then transmitts it over the radio waves.
The other receives the data and displays it.
I’ve not fully tested the range yet, but I’ve had it working over 12 feet going through 2 walls.
Wireless temperature sensor - [Link]
TI has introduced the TMP103 Digital Temperature Sensor with I2C/SMBUS Expanded Interface.
The device features Multiple Device Access (MDA), Global Read/Write Operations,I2C™-/SMBus™-Compatible Interface, 8-bit resolution with accuracy: ±1°C Typ (–10°C to +100°C). The supply range is 1.4V to 3.6V, and the chip comes in a 4-Ball WCSP (DSBGA) package.
According to the press release the sensor draws a maximum of 1 uA while in shutdown mode and 3 uA while in active mode to extend battery life.
TI digital temperature sensor - [Link]
dangerousprototypes.com writes: [via]
Max Carter likes to experiment with Picaxe microcontrollers. He was looking for a way to take readings of the outdoor temperature and make the data available on the internet. He devised a project requiring minimal hardware, consisting of a Picaxe-08M, LM34 temperature sensor and a few discrete components. He programmed the Picaxe to take readings from the temperature sensor and communicate the temperature data to a PC via the serial port. (Note the absence of a need for a TTL-RS232 level converter chip, thanks to the Picaxe!) He then wrote the server configuration code and software for the PC to make the data available via the web. You can check out the online output from this project showing the temperature at Max’s place in Wyoming!
You can read the full details and download the PC and Picaxe code on Max’s website, along with his other informative Picaxe tutorials.
Outdoor temperature data server using Picaxe-08M – [Link]
Stephen Zahra writes:
This Digital Thermometer Design is done by using the 8051 microcontroller AT89C51AC2 and interfaced with an LCD to outputs the Temperature. THe sensor used for this design is the LM35 which output an analogue voltage per centigrade celcius. A circuit amplification is done between the LM35 and the microcontroller.
8051 Digital Thermometer – [Link]
Frank setup a internet-based temperature logger using the ThingSpeak contest data-logging service:
This project uses a mbed microcontroller (LPC1768 ARM Cortex-M3) to monitor temperature using a DS1620 (digital temperature sensor IC), retrieve the time via NTP (network time protocol), and then log the current temperature to ThingSpeak along with a time-stamp.
See a live graph here.
Internet-based temperature logger with mbed and ThingSpeak – [Link]
Woodstove Temp Monitor and Alert… [via]
Paul Westaway wanted to make sure his woodstove didn’t exceed the upper limit of temperature and overheat, thus damaging the stove or causing a fire. He wanted a monitor that could send out an alert if the stove got too hot. He was surprised he couldn’t find a monitor available commercially. So, like any enterprising Gadget Freak, he decided to make one of his own. Using a handful of inexpensive components, Westaway created his own Woodstove Digital Temperature Monitor.
Woodstove Temp Monitor and Alert – [Link]
I became interested in the ATtiny85 processor recently. Up till now, my projects were based on the ATmega328 or the ATmega644. The ATtiny85 is just that, tiny – only 8 pins vs. 28 on the ATmega328. The photo on the left shows the new X10 temperature transmitter, with the DS1621 temperature chip on the left and the ATtiny85 on the right.
X10 Remote Temperature – [Link]