Connection for 5v and GND pins

Hi

I am wondering how I can connect the 5v and GND pins?

Is that able to connect all of the 5v connector into one line of power into the bredboard to get more power from the board?

Ex and question:
I have componnents for the digital pins 0-13;
1.)
Am I able to cros connect the 5v and gnd for ex: the opposite side of the card?

2.)
If the power from one 5v pin is not sufficient can I connect one or several more power pins connect without to get a short-cirtcuit and damage the board?

The board is Mega 2560 R3 or a compatible one!

Best Fredrik

  1. Do ypu mean like this? Connecting the upper and lower power rails and the gaps (if any).

  1. You probably mean to use 2 or more pins to get more power. Yes, it is possible. Max. DC current for single I/O pin is 20mA on Mega2560. You can double the current by using 2 pins which will act together and obtain max. 40mA, e.g. more power for LED. ...but, there is a risk of damage, some mistake in program an bye Arduino. I think, it is better to use some kind of amplifier, transistor etc. If you want to drive for example the relays, you will not avoid to use the circuit like ULN2804 or similar, to protect I/Os against voltage spikes.

Hi Budvar10

You are correct :slight_smile:

Best not to exceed the limit of one pin though. I assume if I connecting several components like led , pin 1-20. I think a need to calculate the power which the components combined is requires and calculate if I need one or more 5v pin?

Is there some documentation for the connection of a Arduino mega 2560 r3 board?

Best Fredrik

but, there is a risk of damage, some mistake in program an bye Arduino.

Even without a mistake you need to change the two pins at exactly the same time to avoid a pair of pins producing a short circuit. Two digital write calls will cause this damage. The only way to avoid this is to use direct port mapping and change both pins at the same time. Arduino Reference - Arduino Reference

So I would recommend NEVER to do this as it is not a beginners thing and is bad electronics practice. Budvar10 has it right, use some other component to get the current up with a single pin.

Is there some documentation for the connection of a Arduino mega 2560 r3 board?

Not sure what you mean, but the processor's data sheet has all you need to know about current ratings of output pins.