Simple Digital Thermometer Circuit Diagram. The project posted here is of electronic thermometer circuit using op amp 741. Diode digital thermometer circuit simple contactless thermometer circuit make it at home.
It just requires a single ic to be connected with a suitable moving coil type of meter and you start getting the readings almost immediately. Operational amplifiers ic3 and ic4 operate off regulated 5v power supply which is derived from 3 terminal positive voltage regulator ic 7805 ic1 and negative low dropout regulator ic 7660 ic2. The entire circuit works off a 9v battery.
Making a simple resistive divider is shown in figure 2.
This tutorial shows how to implement a simple digital thermometer using arduino uno board and ds18b20 temperature sensor. The entire circuit works off a 9v battery. 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 a d converter inside the ic is a dual slope type with differential inputs.
