I have had 2 cores die on me tonight. When testing the circuit using the Tinker the cores work fine, I had them running for hours. When I stared to upload custom sketches onto the core the lights go out after about a half hour. I am not able to get the cores to turn back on, just a small blue light comes on. Has anyone had this issue? So far, I have gone through 3 cores like this. With only 2 left I am afraid to continue to develop on these.
The cores were powered by a bench top power supply regulated at 5v for two of the core deaths. The third core died while connected to a 12 wall wort, using a LM7805 to regulate the power down to 5v before entering the Vin.
Any thoughts or help maybe an idea on how to get these cores working again. If not thoughts on preventing this from happening again.
We are uploading code to test the DHT11 sensor.