VCC Voltage reading

5 years 4 months ago #1630 by Sloclone100
I am troubleshoot shooting the display on my MegaSheild and I found 3.5v at the VCC point of the display where it should be 5volts. I measured pin 5 on con1 on the 2560 and also found 3.5v where it should be VCC (5v). Could there be some wrong with the MEGA board?

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5 years 4 months ago #1631 by Ray
Replied by Ray on topic VCC Voltage reading
The OLED screen is taking +5V from the pin of the Arduino MEGA (just left to the 2 ground pins) see the image below:


You should read +5V there, or at least close to 5V (I read 4.8V on mine).

How are you powering the board? maybe you can try to switch and use the USB power or the DC jack connector power (using a standard +12V wall adapter).

Here is the mega schematic, it may help you:
www.arduino.cc/en/uploads/Main/arduino-mega2560-schematic.pdf
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