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Topic: 2560 total current draw (Read 649 times) previous topic - next topic

ldwilson46

I'm planning on using a 2560mega  to manage a control panel for a machine tool, which will have multiple
indicators. I want to use high-intensity LEDs, which draw 30-50 ma each. The spec sheet says 40 ma max per output pin, but I've seen nothing about total current draw allowable for the chip - essentially, how many simultaneous LEDs can I light up at one time, assuming 30 ma each?

Relatedly, I will need a small amount of 5V power for other peripherals; how much current can the 2560 on-board regulator supply?

Thanks

ldw

Grag38

the best to do is to use anotoher external source of power (like computer psu) and use it to draw the current.

At this point arduino will juste be used to drive your components.

Grumpy_Mike

Quote
but I've seen nothing about total current draw allowable for the chip


Well it's in the data sheet.
The answer is 200mA.

CrossRoads

The regulator is only good for 500-800mA.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

Grumpy_Mike

Quote
how much current can the 2560 on-board regulator supply?


There is also a heat issue so it depends on the input voltage:-
http://www.thebox.myzen.co.uk/Tutorial/Power_Examples.html

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