TCN75A Temp sensor investigation
This entry was posted in sensors and tagged I2C, TCN75A.
Upon receiving the SOIC breakout boards I took one and carefully used a Dremel to mill out the package outline. I had started to design my own PCB but I abandoned that because I didn’t want to wait for fabrication. I mounted the new sensor on it’s vented PCB then plugged the sensors right next to each other on breadboard and put the temperature probe wedged between the boards. Obviously factors like mounting the sensor near power transistors or near your power supply are always going to have some effect on your readings, and in some cases maybe that’s what your application is meant for. I wanted to take those factors out of the equation. My workshop heating and A/C was off for over a day when I did this test… no windows where open and the chips had been prepped for about 1/2 hour on the board while I wrote the code to test them out. I decided to read data straight from the I2C bus with some confirmation on RS-232 telemetry.