Remote Thermometer circuit


Posted on Nov 23, 2012

This circuit is intended for precision centigrade temperature measurement, with a transmitter section converting to frequency the sensor`s output voltage, which is proportional to the measured temperature. The output frequency bursts are conveyed into the mains supply cables. The receiver section counts the bursts coming from mains supply and shows the counting on three 7-segment LED displays. The least significant digit displays tenths of degree and then a 00.0 to 99.9 °C range is obtained.


Remote Thermometer circuit
Click here to download the full size of the above Circuit.

IC1 is a precision centigrade temperature sensor with a linear output of 10mV/°C driving IC2, a voltage-frequency converter. At its output pin (3), an input of 10mV is converted to 100Hz frequency pulses. Thus, for example, a temperature of 20°C is




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

QRP Antenna Tuner
Coupled Coil Metal Detector
ADSL line filter
Bar-graph indicator for ac signals
Telephone Scrambler Circuit
Safety / Protection Circuits
Relaxation Oscillator
Salt TasterCircuit
audio processor circuit using ic ssm2045
Open Charge Regulator
Video Amplifiers for the Mirror Screw



Top