Simple Digital Thermometer Circuit Diagram. This digital thermometer circuit diagram uses a common 1n4148 diode as the temperature sensor. This circuit is suitable to measure temperature form 0 0 c to 50 0 c using a linear scale am meter.
You can also connect the lm35 sensor with long wires by doing this you can easily measure the temperature of objects electronic components circuits and small places where a big thermometer can t be reached. A simple digital thermometer circuit with out a micro controller and having a seven segment led read out is shown here. Infrared ir sensor circuit detector diagram using 555 ic infrared thermometer.
You can also connect the lm35 sensor with long wires by doing this you can easily measure the temperature of objects electronic components circuits and small places where a big thermometer can t be reached.
After calibration keep the box in the vicinity of the object whose temperature is to be measured. Sent by mihail dorutz ch. The arduino microcontroller for example atmega328p reads temperature value from the ds18b20 sensor and prints it in c and f on st7789 tft display. The range can be extended up to 100 0 c using 100 microampere.
