using high current

Other Hardware General Electronics
1

hello.

I'm new to arduino.

I want to make a hundred leds blink at ones.(not multi channel)
so I have to supply high current.
And I will use 6V battery.

I think this can be solved very simply by only arduino uno, without any external cirquit.
but I don't know how to.

should I use vin or something?

please help me!

regards, Chanjin

2

How much current? You will need at a minimum:

A current switching device (transistor or MOSFET or relay)

Series current-limiting resistor(s).

Are you planning to use same power supply for Arduino and for the LEDs? - if so some more decoupling is likely to be required.