Hello,
I'm having trouble understanding power consumption of Arduino Mega 2560.
When supplying 5 volts to the hacked USB cable current consumption in SLEEP_MODE_PWR_DOWN is 70 mA.
But when I'm supplying 5V to the regulator (power jack) current consumption is 35 mA.
Reading forum posts i concluded that current consumption should be lower with USB because i have external regulated voltage and I'm bypassing voltage regulator, but here that is not the case.
Any explanation or tips?
What do you mean "hacked usb cable"? Why are you using a modified USB cable, and how is it modified?
The Arduino boards have a whole bunch of other components on them that draw power. My guess is that that draw is related to the ATMega16U2 that they use to do the USB serial.
Most of the people doing ultra-low-power arduino are using barebones or pro-mini arduinos that don't have any of those extra parts.
DrAzzy:
What do you mean "hacked usb cable"? Why are you using a modified USB cable, and how is it modified?
Yes, modified. Vin and Ground on regulated 5 volts with data + and data - cutted.
Hi Ogulinac,
Quote from: DrAzzy on Today at 05:43 pm
What do you mean "hacked usb cable"? Why are you using a modified USB cable, and how is it modified?
Yes, modified. Vin and Ground on regulated 5 volts with data + and data - cutted.
So are you saying that the USB cable only supplies power, what do you do for programming?? You could be using a programmer of course.... The USB cable powers different things! I now mostly use the Nano and Mini-pro for their size and lack of the things that are'nt really needed.
Regards
Mel.