Transistor Sensor Temperature Measurer


Posted on Sep 10, 2012

Using the fact that the VRE of a transistor shifts 59.16 mV per decade of current at 25°C. This cons


Transistor Sensor Temperature Measurer
Click here to download the full size of the above Circuit.

tant is 0.33%/°C. This V5E-vs.-current relationship holds true regardless of the FBe absolute value. IC, an LT1043, acts as an oscillator and switches a current source (Ql) at a 10:1 ratio. The stepped 10:1 current drive is translated to temperature by IC2, Q2, and the associated components. Accuracy is ±1%. No compensation is needed if Q2 is changed.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Voltage-ratio-to-frequency-converter
Current-monitor-and-alarm
Fast High-Voltage Linear Power Amp Circuit
How to Make a Simple Metal Detector Circuit Using IC CS209A
Optoelectronic circuits
1 hour timer circuit with 4011 and 4020 ICs
Indoor Weather Station using Arduino
Inverter Schematics
USB Cellphone Charger circuit
Low pressure break alarm circuit diagram
A multi-channel pulse distributor circuit



Top