TL's elektronik ting og sager
HYT939 Humidity & Temperature Sensor
I decided to build a high precision humidity meter so I spent some time searching the web. I found this nice device, HYT939. It is already calibrated from the factory so you just have to connect it and it works. It communicates via an I2C bus, so you need to make some software for it to work. Here I have tested it on an old scrapped pcb together with an old version of my display controller, EasyInterface. First I made it with a small OLED display because it was already connected to the pcb I chose to use for testing (DC12). Later I decided to connect the bigger display.
The video below was recorded just after I breathed on the sensor. That is why RH is falling....
Display fun in the dark (with high contrast). 1.6" compared with 5.0"
