Which pin to use to power Arduino from power supply module?

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1

Hey guys,

Which pin should I use to power the Arduino using a breadboard power supply module like the one pictured?

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Should I use the Vin or 5V? I would guess Vin, but I'm just not sure, because the web is full of contradiction...

Thanks

2

which Arduino?

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search for Arduino ( model ) pinout. download a copy. you will need it.

find the VIN >> Volts IN pin. use that.

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This was not intended to directly power an arduino but it will work. It was designed to plug into a proto board. These boards typically have the same regulators as the UNO. You will need to power it either via the USB or with the barrel jack with 7 to 12V. The jumpers on the outside select the voltages for the proto board. Left is 5V, middle is off, and right is 3V3. The other group is to use to power other items (possibly 5V or 3V3 for your Arduino.) This will not supply a lot of current and the higher the input voltage the less it will supply.

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It for an Arduino Mega.

Thanks for all the answers.

PS : @J-M-L En passant, merci pour ton tuto sur les machines à état fini. Je l'ai utilisé en classe enseigner les FMS! :slight_smile:

6

as this board only outputs 5V and would be regulated you could in theory connect to the 5V pin of your MEGA but I would not recommend that as my experience with this product is that sometimes they go wrong and you actually get whatever Vin you have on the output pins (ie if you power with a 9V adapter through the Jack, the 5V pins do provide 9V anyway)

this is meant to power components separately from your Arduino, just need to join the GNDs

if you power this through - say a 9V - adapter, split the output from your adapter and go to the Arduino Jack on side and to this breadboard power supply from the other side. probably safer

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@el_pablo this is not a tutorial, it is a question, so you posted in the wrong section. I have moved it here.

1 Like
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Do I need such a module or I can power directly from the Arduino Mega?

If I want to power a servo motor and a stepper motor for demonstration purpose.

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think of it like this: if you draw current through a microcontroller, you are effectively using the scrawny board lead as a fuse. maybe an RC car servo, not a 3D printer stepper.

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