Arduino largest long possible

Using Arduino Microcontrollers
1

I wonder what the bitsize of the arduino uno is. I want to use a delay of 30 minutes in my arduino code but i dont know if i can store the number 30x60x1000 = 1800000. I have it stored as an unsigned long. So what would the largest unsigned long be?

2

Sorted.

3

unsigned long on Arduino is 32 bits: 0 to 4,294,967,295

1 Like
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2^32 - 1 = 4,294,967,295

unsigned long - Arduino reference

5

232 - 1

6

Exactly. Thanks

7

Okay but is arduino 8 bit? that is what i read on here: Arduino Uno Rev3 — Arduino Official Store
I dont fully understand bitsizes. I thought that if it was 8 bit, then the largest number would be 8 bits which would be 2^8. But that seems to be wrong

8

Yes, the processor has eight bit RAM data paths

9

Yes. You have 10 fingers and that doesn't stop you from counting up to the number you want, right?

4 bytes = 32 bits. :wink:

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aaaahhh okay that analogy is actually good! i see then... Thanks

11

Have a look at Arduino data types reference.
Data Types
Among them there are data types of 8 bits (byte), 16 bits (int) and 32 bits (long).
There are signed and unsigned data types.
You can choose the data type that suits you.

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