Build your own stand-alone temperature and humidity display with this guide on Instructables. The temperature at any one office varies quite a bit depending on the time of day, season. Although you can get custom made thermometers in less than 5$, however the user decide to build his own even if it cost a way too much then normal sensors. The placement of device was layout on the Prema-Proto Board. The author used a completely open-source electronics design application named Fritzing. It’s compatible with Windows, OSx as well as Linux. Its libraries can easily be found on the internet The microcontroller used in this project is typically sold as a blank chip, but some vendors sell Atmel ATMega328P AVRs pre-programmed with the bootloader necessary to interface with the Arduino IDE. … Continue reading
I2C interface allows connecting multiple devices using two wires. This interface is very popular in sensors, memory chips and IO expanders. R-B designed compact breakout board where he placed MCP9802 temperature sensor and 24LC512 EEPROM. Module is convenient to use as temperature sensor with ability to log values in to near by memory. So if you decide to unplug sensor – history of data goes with you. 512Kbit EEPROM gives enough space for storing data. Digital temperature sensor is capable of measuring temperatures from -55ºC to 125ºC. Prototyping board is designed so it could be easily plugged in to prototyping breadboard.
Time is gold – so they say. Well people always keeps track of time and often people keeps forgetting about the time then ending up late for work, school and sometimes a date – what a disaster! To help those geeks out there who keeps on forgetting time bogdi put together this nifty contraption that keeps date and time while also having the capability of measuring temperature. A PIC16F628 or PIC16F84 microcontroller is used to keep the date and time information while also driving four seven segment displays and a DS1631 temperature sensor is used to gather temperature data from the surroundings. The DS1632 temperature sensor is wired out away from the main board so that it could also be used to sense temperature from a specific spot a little further from … Continue reading
Temperature sensors come in various shapes and sizes, they also come in different colors and number of pins but above all these differences one difference must not be taken for granted- how to read the temperature data from it. Maybe the simplest form of a temperature sensor is the thermistor, it has two wires, and the resistances between these two wires vary depending on the temperature. This type of sensor requires an ADC to convert the analog signal into digital. However modern temperature sensors now come with their built in ADC and their outputs can be accessed serially. There are three commonly used serial protocols SPI, I2C and 1 Wire, these vary on the number of wires and on the way data is accessed. In this project the DS1820 is … Continue reading
Mother Nature is always full with many unexpected surprises. That is why some people enjoy the outdoor activities, such as hiking, trekking, kayaking and so on, rather than staying at home in weekend! The only matter is weather is constantly change and unpredictable. Maybe it full with sunshine in the morning, but it rains heavily in the afternoon! It will cause some difficulty, especially for those who planning to have some outdoor activities. In this case, you might need an assistant to help you overcome the matter. Well, Weather Canvas is coming for the rescue! A little bit different from other DIY weather station, Weather Canvas is a outdoor wireless weather monitoring system coupled with an indoor LED display. For your information, the outdoor system consists of a microcontroller, temperature … Continue reading
Some of you here have already known that Thermostat is a device for regulating the temperature of a system. The thermostat is used to control the flow of heat energy into or out of the system. Furthermore, a thermostat can be a control unit for a heating, cooling system or a component part of a heater or air conditioner. The best part about thermostats is they can be constructed in many ways, where is use a variety of sensors to measure the temperature. What will happen, if you combine the Arduino and thermostat together? Yep, you’ll get a new “ThermoSmart” here! This Thermostat consists: An Arduino (Duemilanove), an Arduino Ethernet Shield, a temperature sensor, a relay, transistor, resistors, diodes and much more. Don’t be fooled by the above components, as … Continue reading
Stand alone digital thermometer is very easy to build – especially when microcontroller has an ADC interface built in. Tuxgraphics has posted a new cute thermometer project which uses two NTC temperature sensors. They are cheap and quite precise for most hobby projects. One problem that they are non linear. But this what microcontroller is for. Some basic semiconductor physics and math and characteristics is straighten. Device reads temperatures from two sensors – inside and outside. Both temperatures a displayed on standard HD44780 compatible display and additionally information is sent to PC via I2C interface. Why I2C and not UART? It helps to save the hardware like MAX232 and multiple capacitors. Having connectivity with PC is great – you can always call a small GUI to see current temperatures or … Continue reading