digital thermometer schematics

Posted on Feb 7, 2014

This digital thermometer circuit diagram uses a common 1N4148 diode as the temperature sensor. The temperature coefficient of the diode, -2 mV / 0C is exploited for this application to create an accurate electronic thermometer. To display the measured temperature, a digital multimeter is used and so we can measure temperature values from -9. 990C u

digital thermometer schematics
Click here to download the full size of the above Circuit.

p to +99. 90C. To set the minimum level (00C), place the diode in a glass of water filled with crushed ice (check the temperature first with a normal thermometer) wait until the thermometer shows zero degrees centigrade. Set P1 so that the digital voltmeter will display 000 when the diode senses zero degree centigade.

Leave Comment

characters left:

New Circuits



Popular Circuits

Pine Racecar Victory Judge
Vipor mutant portable HF/VHF/UHF
Voltage, Ampere Digital meter
Video modulator circuit
cw ss zero beat
Dancing light
FET Audio Mixer
Obstacle Avoiding Robot without microcontroller
Building a PIC18F USB device