Not to mention Nokia chargers... Long story, nice that you resolved.
Once Upon a Time I bought a dead monitor from eBay. I plugged in the power supply, and it's green LED lit up, but the monitor was not powering on. I tested it with a multimeter, and it was outputting 7V instead of 12V. The LED made it appear that it was fine, but it was not. Using another 12V power supply, the monitor worked fine. It doesn't hurt to test things with a multimeter, it only takes few seconds.
Thats a lesson that took me over 6 month to learn. Guess i won't ever forget it again..
Guess i was to fast celebrating. So here we go again:
TL;DR: How to make the arduino run from the 5V or VIN Pin?
The system works without a computer connection, if the arduino is powered through the usb connector and a mobile charger.
But i want it to be powered through the same power source my motors and the scanner will run off. So i tried everything to power the arduino via regulated 5V Pin or putting 12V into the VIN Pin but nothing works.
How do i get my Arduino run off the 5V the PSU provides? I measured the output from the PSU Pins and they are 12V / 5V as labeled. The Arduino itself draws roughly 20mA, the PSU could provide around 800mA per output-Pin.
What is most confusing to me and may indicate a problem to work on:
When i only power the scanner module, have it connected to any input pin on the arduino and also have the arduino connected to the GND from the PSU, the arduino "on" indicator flashes, as if the arduino now runs off the serial communication connection from the scanner.
So this might disturb the data transmission from scanner to arduino and stop the working program..
EDIT:
Now even the powering with an extra 5V Mobile CHarger doesnt work anymore. I dont understnad anything anymore....
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