Hello
I'm using MAX7221 to control 8 * 7-segments display, Controlled by ESP8266 NodeMCU 1.0
It runs smoothly and reliably for long times, but rarely before, (and yet 3 times just today) It shorts VCC to GND (to about 2.7V) , and driving its pins LOW (around 1.5V).
In consequence, It turn ESP8266 OFF, which operates on 3.3V.
The display PCB Is designed due to this schematic :
*Note : I'm using only 1 chip, no chaining.
Pics 'could' be useful :
The Only solution is to unplug power for about 2 seconds.
What could be the issue ? could it be temperature-related ?
I'm using MAX7221 to control 8 * 7-segments display, Controlled by ESP8266 NodeMCU 1.0
It runs smoothly and reliably for long times, but rarely before, (and yet 3 times just today) It shorts VCC to GND (to about 2.7V) , and driving its pins LOW (around 1.5V).
In consequence, It turn ESP8266 OFF, which operates on 3.3V.
The display PCB Is designed due to this schematic :
*Note : I'm using only 1 chip, no chaining.
Pics 'could' be useful :
The Only solution is to unplug power for about 2 seconds.
What could be the issue ? could it be temperature-related ?