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Results tagged with power
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user 84
This tag is for questions regarding powering and/or power consumption of Arduino systems.
4
votes
Accepted
Why does the battery eliminator connected to the wall provide a better spin to my dc motors ...
First off, never use 9V batteries to power motors or any device that consumes more than a few hundreds mA. Those batteries are just too weak. … If you want to power DC motors with batteries then rather use several 1.5V batteries in series. …
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3
votes
How to make battery last for months?
The Arduino UNO always consumes current mainly because:
it has 2 MCU, the ATmega328 which you can power down, and an ATmega16u2 for USB communication which is never powered down. … I would suggest you:
work on a breadboard with just the ATmega328,
power it with two 1.5V batteries (AA or AAA)
and run @8MHz
That should already reduce current consumption. …
- 9,142
12
votes
Accepted
Why does an Arduino UNO need two GND ports?
On Arduino, GND pins can be used in 2 situations:
to directly power the Arduino with an external supply which cannot be plugged to USB or power jack. … rail to Arduino GND pin and use this power rail directly). …
- 9,142
9
votes
3.3V, 5V and 9V pins on Arduino
I suggest you rather take a look at this Arduino UNO link which contains uptodate information about the UNO; in there you will see that for R3, the "power rail" has been extended and has the following … plug or the USB plug) that is a "copy" of the voltage input through the power plug or USB plug (not regulated yet) …
- 9,142
4
votes
Accepted
Power consumption issue. I made project using atmel-328p
If the total minimum current for these components is too high for your system, then you can possibly:
use an available ATmel digital output pin to power them (and unpower them just before switching the … ATmel to low power mode); that's possible only if you stay within current limitations of the MCU (there are current limitation per pin, 20mA IIRC, and total current for the whole MCU)
if current consumption …
- 9,142
4
votes
Can I turn off a device using the 5V and analog pins?
The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). … So the max current on this pin depends on 2 factors:
what is the power supply for the board: it is either USB, or an external power supply, which can be connected to the power plug or to the Vin pin. …
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10
votes
Most compact method of powering Arduino from wall socket
Nowadays, most smartphones come with a charger that is linked to the USB plug of the phone.
The charger for my HTC says: 5V, 1A, I guess this voltage must be regulated (but I haven't checked it has t …
- 9,142