Electronics-Lab.com Blog

SerReg is a small home controller intended to turn your personal computer ( PC ) into a process control / data collection system. With the appropriate sensors SerReg can monitor physical variables such as pressure, temperature, light intensity, weight, movement etc, process the information and then use the result to control up to three physical devices such as motors, heaters, sirens, lights or other appliances around the home, office, laboratory or factory . You can program your appliances to operate automatically in conjunction with your weekly and daily schedule, manualy turn them on/off from your PC or use SerReg as a process ON/OFF controller to regulate some kind of physical variable to the desired value.

SerReg small home controller - [Link]

This is tutorial how to interfacing NTC temperature sensor with Arduino.Just a few electronic components such NTC temperature sensor, 1kΩ resistor and a couple of wires you can measure the temperature with Arduino.

Interfacing NTC temperature sensor with Arduino - [Link]

The TC77 is a serially accessible digital temperature sensor. Temperature data is converted from the internal thermal sensing element and made available at anytime as a 13-bit two’s compliment digital word. Communication with the TC77 is accomplished via a SPI and MICROWIRE compatible interface.

TCN77 Thermometer – [Link]

This circuit uses a Dallas DS1621 temperature sensor which indicates the temparature of the device. The temperature sensor has an termal alarm output, which becomes high when the temperature of the device exceeds a user defined value. When the temperature drops below a user defined value, the alarm output becomes low. In this way any amonut of hysteresis can be programmed.

Temperature Indicator - [Link]

Member Boss Sauce shares pics of his precision temperature controller using a PID mechanism. A PID (proportional-integral-derivative) controller measures a specific variable (such as water temperature) in comparison to a predetermined setting (ideal temp). The controller then performs a corrective action via its control circuit in order to reach the desired setting (i.e. – increases power to the burner). Result = dinner cooked up just right.

PID temperature controller for cooking - [Link]

Building digital thermometers is probably one of the common tasks around embedded hobbyists. However more such projects more choices so more things that can be learned. So this one uses PIC16F876 microcontroller with MCP1047A temperature sensors connected to it. Thermometer displays two temperature values – inside and outside.

The hardware of this thermometer is pretty simple – PIC reads temperature sensors via ADC. Temperature values are displayed on standard 2×16 LCD and logged to RS232 at desired intervals. ASM code is available. [via]

Dual Thermometer with serial output - [Link]

The Faucet Buddy concept is a tiny chrome gadget which can be latched onto your existing sink fixtures, letting you know just exactly how hot (or cold) water flowing from your tap is. In addition, it helps nibble at your conscience by letting you know if you’re using more water than you actually should. Designed by Baek Uyeol, these should be made mandatory in homes everywhere. [via]

Keep track of your water usage and temperature - [Link]

Climate controller reads temperature and humidity values from SHT11 where are temperature and humidity sensors combined. Temperatures scale reaches from -40 to 123ºC or (-40 to 254ºF) while humidity readings can vary from 0 to 100%.

Controller board can control three distinct CD outputs with 10A load or 2 DC outputs and one AC up to 4A. This project can be ideal for greenhouse control, small room climate control or in other areas where temperature and humidity has to be sustained. Complete project files including C source, hex file, schematic and PCB can be downloaded here.

PIC based climate controller - [Link]

If you want to measure temperatures of remote objects there is the only way to do this – get wireless. This particular project explains how to build simple wireless RF temperature transmitter which uses TXM-433 module and Atmega8 while receiver (SILRX-433) is connected to PC via RS232 port.

RF Temperature transmitter sends six bytes of data at fixed interval. Module measures three temperature values, light level at photocell and battery voltage. Small Visual Basic program collects data and displays it in a table view. As author (Don Carveth ) says – he can monitor temperature and the light went on of three compost heaps in the back yard by sitting in the room. But this is pretty universal device to use it for other purposes. Program code is written for GCC compiler. [via]

Wireless temperature transmitter - [Link]

RFM12 is a transmitter and receiver module in single board. It can be powered by using 2.2V to 5.4. It makes ideal module for embedded systems. Module communicates via SPI interface. Wigbert Picht and Dirk Milewski have made simple Atmega8 tesboard, where RFM12 module is soldered as SMD element and can be configured with jumpers. There can be any sensors connected to this board like temperature. [via]

Interfacing RFM12 transceiver module - [Link]