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

EPROM adapter for ATMEL Programmer
1 transistor treasure locator circuit
Output-limiter
Biosensor circuit
LM3914 Low Power LED Voltmeter
KMotion Connectors
Interfacing MSP430 to analog AC-rated humitidy resistive sensor HCZ-H8
h bridge Where to place decoupling capacitor
Transcutaneous Electrical Nerve Stimulator (TENS)
Medical ultrasonic atomizer 1
Search for Varicaps



Top