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Finaly a Good Place for My ...View Instructable »
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Watch Out! As a good electro-engeneer you use the right logic-levels!Therfore I used a 2 chanel IIC Level Convertor Module (zie Julian Ilett op 6:30 min)
My Distance Sensor HC-SR04 didn't work on 3,3 Volt ! It needs 5 Volt. Therefore I used a Level Convertor Module.See Julian Ilett (URL = https://www.youtube.com/watch?v=4HyLAW_JISw&t=3s ) on 6:30 min.
I used a DHT22 ... better performance
You said: "I first attempted to power my display from my arduinos 5v. This worked, but only halfway – the display fired up, and started cycling the demos in the sketch we will see later on, and then froze after a few seconds. I then powered my display from my external 5v supply (with common ground to the arduino), which did the trick – the display is now working properly".This is somewhat strange ... some of the replyers have no problem with powering from the arduinos 5V?