Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
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Will the 3.3V regulator on an Arduino Leonardo work when powered from USB?
Will the 3.3V regulator produce 3.3v when the Arduino is powered from the USB port?
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What does the datasheet information for a switch mean?
I'm clueless when it comes to the information on datasheets for switches. When I see a datasheet for LEDs or servos, I'm used to seeing a fairly straightforward call out for the required volts and ...
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Arduino power consumption issues
I'm working on an Arduino project involving an UNO.
I'm powering a 20x4 LCD screen and I am using all the ports on the Arduino, to the last.
All but four of them are pulled high at any given time, ...
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What is Vin for the EthernetPOE board?
I am working on a project that needs to drive a relay board. I'm looking at the ETHERNET board with PoE and according to the documentation here (http://arduino.cc/en/Main/ArduinoBoardEthernet) the ...
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Arduino on battery getting unstable if temperature falls
i am building an outdoor sensor with a combination of a custom Arduino board and a battery (+solar charging). I experience strange behavior when the temperature falls below a certain value (i can ...
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Does Leonardo need a separate power supply?
I'm currently using an Arduino Uno (R3), but want to switch to Leonardo for the USB-ability. The Uno can work from the USB's 5V. Looking at the Leonardo's schematic it seems the only input to the ...
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where to syphon off voltage from a 25 pin serial? [closed]
I have a mircocontroller that's looking to be powered by a 5v source.
I am trying to 'cypher off' some of this power from a 25 pin serial port, which is being powered by a constant power source.
Are ...
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Power consumption issue. I made project using atmel-328p
I made project using atmel-328p. I want to run it over a year. I am using power_down mode & 5500 mAh li-ion battery still battery discharges in 1 day. I am using standard code as explain on ...
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Controlling multiple LED strips with arduino
I want to control several (undecided) cut strips of these led lights:here.
I want to be able to turn the LEDs on and off from the arduino, but I know that the voltage is too high to work with with ...
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Powering 5V Accesories
I'm using an Uno to control NeoPixels LED strips (60 per metre). These are powered with a 5V DC supply. Now, when using USB to power the Arduino it works lovely. However I want to move the Arduino ...
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Is the supply voltage made available anywhere on the Arduino Uno Board?
I need to power an OpAmp based circuit that will be connected to my Arduino Uno input. Since I have a 12V adapter for the Arduino board, I want to draw power from it for this opamp(LM358).
Does ...
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Driving stepper motors adafruit motor shield v2
I got an Arduino Uno Rev3 and Adafruits Motor Shield V2. I also got two RepRap stepper motors:
Frame size 42 x 42mm - NEMA 17
1.8 degree step angle
Length 47mm
Holding torque 44 N.cm (4.4kg.cm, 62oz....
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Two 300RPM 12V DC motors connected to arduino motor shield r3 power supply
I have two 300RPM 12V DC motors connected to arduino motor shield r3 that is mounted on arduino uno board.
Problem is my motors runs very slow some times not even running.
After googling I found I ...
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Arduino USB Power vs External Power Supply
Why is the Arduino able to accept ~5V from the USB, but requires a min of 7V when using an external power supply?
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Power servo with external power using a hacked USB cable
I want to use a servo motor and control it by an Arduino Duemilanove (or a Leonardo). It seems to work fine when I connect it directly to Arduino's VCC, GND and an PWM pin. But I am a bit worried if ...
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Controlling flexinol with an arduino board?
I am looking to wire up 16 pieces of flexinol (http://www.musclewires.com/MWFlexinol.php) using an arduino board. Ideally I would like to be able to activate them independently, meaning that they ...
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Why does the battery eliminator connected to the wall provide a better spin to my dc motors than my battery of the same voltage?
Using a H-bridge, I've connected my DC Motors to an Arduino. When I accept the external power source from a wall, using a 9V battery eliminator, the motors spin well and consistently. However, when I ...
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Driving power MOSFET from 3.3v or lower Arduino Pro Mini
I want to control a low voltage (hobby class) motor with a 8Mhz/3.3v Arduino Pro Micro. I'd like to power both from 2 alkaline cells. The motor draws approximately 1 A @ 3V with new batteries. I ...
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Arduino uno + XBee Shield Not transmitting when under battery power?
I have a few Arduino's along with XBee Shields communicating with one another.
The problem I'm having is that, when all the Arduinos+XBee Shields are powered via USB(PC) they seem to work fine and ...
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LCD display under power saving mode
To make LCD display, Pro Mini and ATMega2560 to run on one set of battery for months, appreciate idea and comment.
Which LCD to use?
Which LCD chip controller chip (hide inside the LCD) has better ...
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Attiny84A and IR Sensor
I have a GP2Y0A21YK0F Sharp IR Analog Distance Sensor 10-80cm + Cable, Arduino Compatible and its is connected to my Arduino. All works well and I can read the analog data with the following code:
#...
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Is it ok to share the same power rail for the arduino and a shield?
I have a two amp 5VDC power rail. I have configured a motor shield to use external DC (by moving a jumper.) Is it ok to share the rail between the arduino's 5V and Gnd pins, and the motor shield?
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Budgeting Power for 5V Arduino Pro Mini
In my low power project, I'm using a Arduino Pro Mini (5V, 16 MHz, ATMEGA328) and a low wattage 3W power supply. Everything else on the system other than the Arduino uses a max of 1.98W.
How much ...
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Can I power an Arduino with a computer's motherboard?
I was thinking of using my Arduino to turn on and off a computer remotely. I would like to know if the 5v header pin on a computer's motherboard (which I’m using instead of a USB because the 5v pin ...
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Curious: What would happen if you connect 5V and GND port directly with a wire
Has anyone ever accidentally or inadvertently connected connected the supply port with the ground port with a wire?
Does Arduino provide internal safety to prevent the circuit board from shorting ...
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What's the best way to control a USB-powered desk light
I recently bought a USB-powered desk light. Is it possible to control (turn on/off) it with the Arduino Uno? The desk light has 3W so needs 600mA.
Should I connect the USB wire with the 5V pin of the ...
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Leonardo (32u4): ways to brick it programmatically
When the Leonardo was introduced, I think, I've read some articles about being cautious to do some things, that could cause it to not load any new sketches any more, so one has to rewrite the ...
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Running an LCD keypad shield from a separate power source
I need to use a motor shield and an LCD keypad shield simultaneously hooked up to a single Arduino Mega Board. Since I can't physically stack them, I decided to reroute all the pins used for the LCD ...
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Mega 2560 powered with 7V don't work correctly
I have an Arduino Mega 2560 with a GPRS seeedstudio shield and an USB Host CircuitsAtHome shield which work fine when powered with USB or with an adjustable voltage regulator set at 8V.
When I set ...
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MCU fuses used by Pro Mini and ATMega 2560 and power down
In context of Pro Mini and ATMega2560
Fuses, as documented in chip factory doc are complex topics (I have not really used it before), appreciate pointers and advises, to narrow down those that are ...
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Using multiple laptop battery packs to power everything
I'm working on a medium sized robot project with multiple arduinos to control stuff. I've been planning on using a lead-acid battery pack, but then I was given 10 working and identical Asus laptop ...
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Can I use this pinhole camera with arduino?
The pinhole camera is a 420TVL, 3.7mm Passive Infrared Detector Color Covert Security Camera. Can I use this camera with an arduino creation?
Things I don't know to answer the question:
Does the ...
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Externally Powering a 3.3V device (nRL24L01+) with a 5V Arduino Pro Mini?
I have seen several references where the solution to interfacing a 5V Arduino with a 3.3V nRF24L01+ was to power the nRF24L01+ externally.
How do I do this? The ground of the nRF24L01+ is connected ...
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Can I use the SVG headers on the SainSmart Uno to drive servos?
I am working with a Sainsmart Uno with SVG header pins. This header is really convenient for hooking a servo to directly, so I have two servos connected to it on D9 and D10 and a 9v battery supplying ...
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Olimexino (32u4): power down
I want to power down my Olimexino as much as possible and only wakeup on a pin-change interrupt. I removed the 3.3V/5V jumper (so the processor does not get power) and 3µA were displayed, so the ...
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External (pin change) interrupt and power consumption
I want to write a lipoly powered arduino device that can be launched from sleep mode by pressing a certain key that is connected to ground. Usually, when no in sleep mode I enable the internal pull-up ...
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Why does arduino work on usb power?
The arduino website states that the operating voltage of an arduino is 7-12V.
Why does the arduino work powered on just usb then? As usb only outputs 5V and 500ma.
Is it preferable to say run the ...
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Can I use an external power supply and still communicate with my computer over Serial?
I read the following online:
If you plug in both USB power (say from a pc) and external power via the 2.1mm jack, the Arduino chooses power source automatically.
If the external 2.1mm DC is providing ...
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Autonomous Quadcopter power distribution and sensing concerns
I've been programming and testing an Arduino based quadcopter for the past 4 months. Until now I did not need to use an external power source for my sensors. Now I want to use the 'BEC' power from my ...
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Efficient periodic wake up for sensor reads [duplicate]
I've been tasked to do an initial design for an Arduino setup that needs to run very infrequently.
Basically, I'd like the system to wake up daily to take some sensor readings and report them back to ...
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What is the smallest microcontroller capable of running Arduino? [closed]
I'd like to know which is the most powerful, lightest, and perhaps least expensive micro controller capable of running Arduino.
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DC-DC converter with Arduino not working
I've got a program running on the Arduino that is supposed to turn on and off a pump. currently, I am outputting the reads of the components that need to be read and it shows when the port (port 13) ...
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Can I turn off a device using the 5V and analog pins?
Could I connect a device that requires minimum 5V 1A from the 5V Pin to the Ground and somehow turn it off inside a sketch?
edit: I'm using a Due based boad, the digix http://digistump.com/wiki/...
CommunityBot
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Arduino Uno + Ardumoto + BT robot works from USB but not from baterries
My Arduino UNO board is part of a small robot that works when connected to the laptop by USB but it does not when plugged to the batteries. The baterries plug seems okay, it outputs 7.8 V. My UNO is ...
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What will happen if I give my Arduino Uno more or less than 5 volts? [closed]
Will it still run on less than 5 volts? Will it break?
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How to switch an external circuit with Arduino?
I have an object with a series of led and I want to turn on and off these leds from my Arduino. The input of the LED circuit is 24v DC 100mA.
What I've done is the following:
I've cut a wire of this ...
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How to power Arduino externally for long term? [closed]
For a robotic project, I need to keep an Arduino powered up for a long time in an outdoor environment. What can I use to power the board?
If battery is the only solution, can the device tell me ...
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Why is the regulator very hot?
We have an LED strip connected to output 6 and is powered by the Uno board itself. Shouldn't be drawing too much current, only have 10 elements on the LED strip. While this LED strip is connected to ...
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