Arduino to power breadboard

hello,
this first post , i'm new (practical) world of electronics.

i have basic understanding of electronics like, p=vi, calculating parallel , series resistance, etc...
but have never put understanding practice.

i start simple circuits on bread board.

can use arduino power supply breadboard?
i figure, why deal batteries or buy/build power supply , later buy arduino, if can buy arduino right off bat.

i'm trying decide if (when i'm ready), raspberry pi better option arduino. guess same question raspberry pi. can used purely power supply breadboard.

if helps, start simple analog circuits, maybe rlc filters, led circuit, etc...

tia.

you can use output arduino 5v pin provide limited amount of power breadboard - 200 - 300 ma.

if need more power need separate power supply. ground separate power supply , arduino ground should connected.

the digital i/o pins on arduino can supply max of 40ma , 20ma more realistic. , think max digital pins must less 200ma.

if want use 1 of digital pins light led remember include current limiting resistor - 470 ohms 4700 ohms should fine.

...r

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