Tag Archives: thermometer

PC Thermometer Using D-sub Connector

One of the element in medical is the temperature, it prevents the buildup of humidity in the operating room, prevents the doctor and nurse from sweating while operating and refrigeration of medicines. In medical applications, reliability of the components is critical. The TE Connectivity D-sub connector has been accepted by the electronic industries for their rugged design and ease of application.

The circuit is a simple PC thermometer using the 5747840-6, a male D-sub connector of TE connectivity as a way of communication to the computer. The LM2936Z is a 5V regulator that provides input voltage to U1 and U2. The DS1621 (U1) is a digital thermometer and thermostat sensor, which indicates temperature for the device. The other DS1621 (U2) is optional for outside temperature monitor or a second reference source to be monitored. Software is used in the PC so that the temperature can be monitored in the PC’s screen.

The PC thermometer is applicable in situations where the room’s temperature is being monitored at a distance like in the operating room, blood bank, and other hospital applications.

PC Thermometer Using D-sub Connector – [Link]

Bluz Grill Thermometer


Bluz powered probe thermometer to stream temperature data to your smartphone. Never dry out your steaks or chicken again! By Eric Ely:

With summer arriving, and the fear of dried out chicken looming, we wanted a more high tech way to track the temperature of items we are grilling outside. There are wireless probe thermometers, but they require carrying around a separate readout. We wanted a way to read the termperature from our smartphone, so we took the just the thermometer and hooked it to bluz!

Bluz Grill Thermometer – [Link]

Arduino Thermometer With DS18B20


by KonstantinDimitrov @ instructables.com

Hello, everyone !!! Today I’m going to show you how to make Arduino thermometer with DS18B20 digital temperature sensor, builded on breadboard and connected together with jumpers.

Info about the sensor – DS18B20 is 1-Wire digital temperature sensor from Maxim IC. Reports degrees C with 9 to 12-bit precision, -55C to 125C (+/-0.5C). Each sensor has a unique 64-Bit Serial number etched into it – allows for a huge number of sensors to be used on one data bus.

Arduino Thermometer With DS18B20 – [Link]

89S52 Thermistor Thermometer: LCD version


by Wichit Sirichote:

This is the 2nd version of Thermistor Thermometer Project done by another group of my student. The 1st version having 4-digit 7-segment LED shows the use of simple display device. For applications that needs text display, this LCD version is more suitable and easy to adapt for many kinds of measuring devices.

89S52 Thermistor Thermometer: LCD version- [Link]

Wireless Nixie Thermometer


by christian.ich.7 @ instructables.com:

The Target of this Project was to learn how to use different functions of the atmega:

• Connecting two Atmegas with a wireless connection
• Each Atmega has a Thermometer (DS1621) to read the actual temperature
• Use the sleep Mode of an Atmega
• Controlling a Nixie bargraph In-13

Wireless Nixie Thermometer – [Link]

Seven Segment Display Arduino Thermometer


by Ardumotive_com @ instructables.com:

Today I will show you how to make your own 7 segment – 2 digit – thermometer with Arduino uno and DS18B20 temperature sensor.

I prefer to build my own arduino based circuit by using the ATmega328p uno possessor, but this is optional for you. You can also use breadboard to build it easier 😉

Seven Segment Display Arduino Thermometer – [Link]

Arduino Thermometer With LM35


by PowerBot @ instructables.com:

Hello, everyone !!! Today I’m going to show you how to make thermometer with Arduino and LM35 termperature sensor, builded on bread board and conected together with jumpers (bunch of cables :D).

Arduino Thermometer With LM35 – [Link]

Digital Thermometer Circuit


A thermometer is utilized to quantify the temperature of solids, liquids, or gases. A thermometer contains a fluid (normally mercury or a liquor arrangement) in a supply whose volume is directly reliant on the temperature (as the temperature expands, the volume increments). At the point when the fluid is warmed it ventures into a thin tube that has been aligned to demonstrate the temperature. Temperature can be recorded in Celsius, Fahrenheit, or Kelvin, accordingly it is imperative to note which scale the thermometer is balanced for.

This Do It Your Own (DIY) digital thermometer circuit can measure temperatures up to 150°C with an accuracy of ±1°C. The temperature is read on a 1V full scale-deflection (FSD) moving-coil voltmeter or digital voltmeter.

Operational amplifier IC 741 provides a constant flow of current through the base-emitter junction of NPN transistor BC108. The voltage across the base-emitter junction of the transistor is proportional to its temperature. The transistor used this way makes a low-cost sensor. You can use silicon diode instead of transistor. The second operational amplifier is amplified by the small variation in voltage across the base-emitter junction, before the temperature is displayed on the meter. Preset VR1 is used to set the zero reading on the meter and preset RV2 is used to set the range of temperature measurement. Operational amplifiers operate off regulated ±5V power supply, which is derived from 3-terminal positive voltage regulator IC 7805 (IC1) and negative low-dropout regulator IC 7660 (IC2). The entire circuit works off a 9V battery. Assemble the circuit on a general-purpose PCB and enclose in a small plastic box. Calibrate the thermometer using presets RV1 and RV2. After calibration, keep the box in the vicinity of the object whose temperature is to be measured.

Digital Thermometer Circuit – [Link]

PIC Digital Thermometer & Clock


Joe @ hobbyelectronics.net:

Here you will find complete construction details including circuit diagrams, PCB layouts and PIC firmware (and the source code). The code was written in Proton PIC BASIC but the good news is that there is now a free version of this compiler available for download; AMICUS18.

PIC Digital Thermometer & Clock – [Link]

A DS18B20 1-wire digital thermometer AVR ATmega library


Davide Gironi writes:

DS18B20 is a programmable resolution 1-wire digital thermometer.
It has an operating temperature range of -55°C to +125°C and is accurate to ±0.5°C over the range of -10°C to +85°C.
This library is an AVR implementation to retrive temperature from DS18B20.

Built using the reference document: “Using DS18B20 digital temperature sensor on AVR microcontrollers