Hello,
For a project i want to power the Arduino Giga R1 Wifi with the VIN Pin. I wanted to know if there could be any problems of powering it with 9V 2A. Can´t really find anything about a max current in the datasheets. Just that at other boards like the uno problems with overheating are if you power it with more than 1,5A I think. Thank you for any help.
Welcome to the forum
The board will take the current that it requires. You cannot supply too much
You need to read up on and understand Ohm's law
Hi!
The internal voltage regulator can take 6-24V, but 24V is aa little bit high.
the board takes the current that he need. the current con be higher if you want to power other devices.
normally the internal regulator can handle 500ma, 800ma MAX.
Probably with 800ma che regulator may can blow up after some time.
Also higher voltage can blow up the regulator with less current, because the regulator is a linear one, anche the dissipate power is: (Vin-5)*I.
So, if you want to power a lot of stuff, it's better to use an external 5V regulator.
Have a nice day!
That is the manufacturers are in the same place we are, we do not know what the load is, what the ambient temperature is, what the heat sinking ability of the heat sink if there is one. You multiply the voltage dropped by the regulator times the current and you will have the number of watts you need to dissipate. The warmer it is the less it can supply. Most manufacturers will post a data sheet showing these parameters generally in a graph form.
With very few exceptions, a regulated power supply labeled 9V, 2A will output anywhere from 0 to 2A, with a constant output voltage of 9V. The load will draw what current it needs, pursuant to Ohm's law, effectively. What you need to be aware of is, how much current your Giga + peripherals will likely draw, as that will determine how hot the regulator will get. Too hot, and the regulator will either shutdown, or fry. Generally, we recommend that people power very little from their Arduino except the Arduino itself, and power other devices independently. Only tie the grounds of the two power supplies together.
This would be the case for a linear voltage regulator, however GIGA R1 uses a switching voltage regulator rated for 1.5A based on the Arduino data sheet, the voltage won't matter with it being switching. With the 3V3 regulator also being a switching one rated up to 1A taking power from the 5V one.
Sorry, that is correct but the efficiency also needs to be accounted for. I based that answer on my experience as I do not have a Arduino Giga R1 Wifi. I checked the internet and got the wrong schematic, I tried to find it again but the correct schematic is not showing.
Cool, I thought it had the same linear voltage regulator as other Arduinos
You can download the schematics for the GIGA R1 WiFi board from the link under the "DOWNLOADABLE RESOURCES" section of its documentation page:
Thanks, I spend about 1/2 hour and google did not find it for me. Both the 5V and 3V3 are SMPS (Switch Mode Power Supplies).
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