Pages: [1]   Go Down
Author Topic: Current Consumption with different RAM  (Read 374 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 2
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi

I am not a hardware expert. I am in the normal mode of Uno. (No sleep or power saver mode). I want to know if it consumes the same amount of power if i use 50% RAM or 100% RAM? does it matter how computationally intensive my code is ?

Thanks
M-seven
Logged

nr Bundaberg, Australia
Offline Offline
Tesla Member
***
Karma: 126
Posts: 8471
Scattered showers my arse -- Noah, 2348BC.
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Neither make any difference, even if your code is doing "nothing" it still runs one instruction every 65nS.

You can however reduce power in other ways if it's important to do so.

______
Rob
Logged

Rob Gray aka the GRAYnomad www.robgray.com

United Kingdom
Offline Offline
Tesla Member
***
Karma: 223
Posts: 6593
Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's Law.
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Read and writing RAM continuously may use slightly more power than running a loop that does no RAM reads/writes, however I expect the difference would be small.
Logged

Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

0
Offline Offline
Shannon Member
****
Karma: 200
Posts: 11672
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Also its not just the microcontroller that takes current - the 8u2 that interfaces USB to serial is also consuming significant power.

If you want to really optimize the power consumption you'll need a board without the USB/serial interface built-in.

The microcontroller power consumption is proportional to clock frequency (all else being equal),  and increases with supply voltage, so that the 8MHz 3.3V Pro Mini consumes about 5mA compared to the Duemilanova's 25mA (where the clock is 16MHz, voltage 5V and there is a FDTI serial chip).
Logged

[ I won't respond to messages, use the forum please ]

Pages: [1]   Go Up
Jump to: