Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
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Power up Arduino using AC/DC Adapter
Wanna get your advice regarding powering up Arduino Uno using AC/DC Adapter to the barrel jack.
The first adapter I use couldn't work and the shop which I bought it from said the adapter was short ...
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Arduino sleep mode problem while sending data with gsm module
i am trying to send gps data via sim800l gsm module. Working fine without the power down code but when i add the power down code it stops working (not sending the gps data. code execution stops in ...
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Power Arduino and LED strip
I saw this question about powering Arduino and LED strip. So, I searched for a 5v 4a power supply and foud this one.
How does that adapter provide power for both Arduino and LED strip? I thought I ...
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Circuit not working with 9 volt battery [duplicate]
I have made a simple circuit having an IR receiver and a Servo motor. Here is the diagram:
Red wire: power
Black wire: ground
Orange wire: digital signal
And here's the code:
#include <Servo.h>
...
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129
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Warm Atmega328p and weird power behaviour
I recently built a circuit with an atmega328p (which I have never used before standalone) and attached all the neccessary components (crystal, capacitors etc). However, when I powered it up with a ...
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1
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How to power Arduino pro mini and DFPlayer mini togather with 3.7 V LiPo battery?
I made a small box containing Arduino Pro Mini , DFPlayer Mini player and a 3.7V LiPo battery. Is it possible to power two devices with 3.7 V Battery?
What is the best way to save power for longer ...
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361
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How to supply more than 500mA while powered by USB
I'm about to build myself a new BrewPi and I have some Arduino power/USB questions.
Something smiliar to a combination of these projects:
https://i.stack.imgur.com/gZHZt.jpg
https://www....
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How to keep track of millis during sleep mode
In my application, I need to keep track of the time the application has been running as well as use sleep modes. However, when using the sleep modes, Timer0 is disabled, and therefore millis stop ...
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2
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236
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Powering a system using batteries
I made an arduino nano IR sensor based auto liquid dispenser. Currently it is being powered by a 12V 2 amps adapter. The 12v adapter is connected to a LM2596 DC to DC buck converter which converts the ...
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1
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Motor cutting out when using HC-05 Bluetooth module
I'm using an L293D motor driver chip along with an HC-05 Bluetooth module. The two work as expected separately - I can send a string via a Bluetooth terminal app on my phone to the HC-05 and I see it ...
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Understanding the variation of Arduino's current consumption with respect to the voltage supply
Even though this is already a well-debated topic, I couldn't find an extensive discussion about what really is drawing so much power in Arduino's board.
Here is the preamble: I have an Arduino Mega ...
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1
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603
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NodeMCU Power supply
I got a question about externally powering my NodeMCU V3. It has an onboard voltage regulator (3v3) which breaks out to 3 header pins. Now I want to power 3v3 from an external board. Can I supply 3v3 ...
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167
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NodeMCU Power Draw and charging Circuitry
I am planning to build a small wireless keyboard, around 5 buttons and 1 rotary encoder, that will connect via WiFi to my Spotify account. For this project, I was looking at the Node MCU for the board....
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Vin pin vs USB vs Barrel connector: Wemos D1 R2
@Majenko says in the leading (19 Upvote) answer here not to use VIN and USB socket at the same time.
You must never ever connect VIN to a power source and connect the USB socket. That can destroy ...
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How to power 6 servo motors using battery to create a robotic arm?
I am trying to create a robotic arm. The problem is that I could not run all 6 servo motors -3 MG966r servo motors and 3 MG90S servo motors - simultaneously, using 12V and 3A AC to DC adaptor. Last ...
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Inductive spikes upset Interrupts
I am using an Arduino Uno to create a kinetic sculpture with magnets and electromagnets (EMs). I have a setup with two externally debounced buttons using resistors,capacitor and CMOS 4584 hex inverter....
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Is it possible to overload the digital pins for an Arduino?
I worked on an Arduino project for school that was a self-driving security robot that also acted as a smart home system.
It was essentially a self-driving Roomba-like car that included several LED's(...
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2
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What current is safe for Wemos d1?
I've got 12V / 400mA power supply for my Wemos D1 R1, and I'm using VIN output(I need 12V for led strip). I need to change this power supply because of color, and I can't find similiar with the same ...
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1
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Using RST pin as external power switch
I have Arduino Nano with powered over USB. I have the request for external (physical) slide switch acting as power on/off for Arduino even if USB is always connected.
Looking at documentation and ...
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External vs arduino power supply for servo motors?
I recently created a project that involves the control of three SG90 servo motors. I started off by controlling this through the 5V output pin of the Arduino Uno, with the Arduino powered through the ...
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Problems running Arduino project off a 9V battery
I have been working on an Arduin Uno Rev2 project for a while now. I have been developing using my MacBook, downloading code through the USB jack running it, monitoring the serial output on my MacBook,...
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Rechargeable USB "AA" Batteries. Has anyone used them?
I have a cosplay project where I'm creating a "Megaman" aka Rockman type of arm cannon (it's actually based on DC's Cyborg). Anyhoo, I've been weighing options like using 3xAA alks or 4xAA nicd (or ...
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Arduino Uno SD card storage
I am interested in storing accelerometer data to an SD card. Since power consumption is the main consideration of my project, it is important to do as few writes to the SD as possible, because the SD ...
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Saving Power :: Reducing Power Consumption
For Arduino Nano 33 IoT, I want to turn off everything except Bluetooth and Wireless since I don't use them.
My question please: Can I switch off / deactivate the IMU sensors completely? If yes, How ...
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Servo motor troubles
The image is as clear as I can make it.
Here are the basics of my problem. My program is meant to make 6 red LED lights in sequence fade in and out, toggle 5 white LED's on and off with a button, and ...
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2
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181
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Arduino Turn Signals
Could I use an Arduino to power run the following lights? Here I have a project in mind, and although I am new to electronics, I am a computer programmer (C, C++, C#, Java) by profession so the coding ...
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2
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242
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Arduino "Phantom Powering"
I am using an Arduino Uno in my project. I recently found that if I disconnect the power from my Arduino (I am powering it by USB port, from a 5V regulator - 7805), then it remains under power from ...
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Motor driver shield l239D should be giving enough power but it doesn't
I am doing a line follower robot using motor driver shield l239D stacked with an Arduino uno to run 2 DC motors and two infrared sensors. I am supplying 12V to the motor driver shield trough three ...
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how do i know what battery(how much ampere and voltage) my circuit needs to work perfectly?
i really love to make a lot of things but i always have this problem that i don't know how can i determine what battery(with how much voltage and amp)my circuit must have to work perfectly! please ...
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Part identification [closed]
This may be a dumb question but i would like to know what this part is. Anyone who knows?
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2k
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Sleep mode and watchdog at the same time
Suppose we want to save battery power, and we use sleep mode and also prevent the Arduino from hanging and use the watchdog timer.
The problem is here that when the Arduino goes to sleep the watchdog ...
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2
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5V on HIGH Digital Pins, Only While Using USB Power
So I have a small problem with my Arduino Pro Mini here. May be worth noting that it is a clone, but otherwise this is still some weird functionality. I have done some experimenting so I'll just set ...
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how can i conect a lipo charger to a teensy 4.0?
I have the battery charger product https://www.adafruit.com/product/2124
and a teensy 4.0, that I would like to use to power it.
what, if any pin would I connect from bat, to the teensy?
Its my ...
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MB-102 BreadBoard Power Supply Limitation
Does the MB-102 can handle Arduino Uno, SIM900 and 3 other modules that requires 5v? If yes, does 9v battery is enough? If no, please suggest me what should I use that uses only 1 barrel jack(if ...
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Why doesn't pin 19 work when powering the EzSBC Esp32 board from batteries?
I recently got an ESP32-01 Breakout and Development Board from EzSBC.com. It is advertised as a board specifically designed for use with batteries because of it's low current draw when in sleep.
As ...
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3
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How to save data in arduino when it's power goes off
I am doing a project 'arduino based switch operation'. Here the user needs to set a time to turn on relay and set time to turn it off. The problem is that I want to supply power to arduino using ...
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1
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How to Set the Control Register on the DS3231 RTC module for Arduino UNO R3?
I am using the DS3231 RTC connected to an Arduino UNO R3 for a project. I won’t go into detail, but I need to save power, therefore I am using the DS3231 Alarm Interrupt to wake the Arduino from sleep....
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1
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MkrWan freezes after short power outage
My MkrWan running on 5v 3A external adapter without battery. When short time(15-20 second) power outage happens Mkrwan still seems running. I think it consumes power on capacitors on adapter but ...
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Nodemcu powering with 5.2v and 2A?
I bought a this voltage regulator . DC-DC 5v 8A voltage regulator. ıts supported 8-35V input voltage . And i want to use this with 12v power supply.
But i searched on the internet . Nodemcu max amp is ...
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How can I power an ESP8266 using a 9V 1A barrel connector power supply?
I have a Huzzah Feather ESP8266 (pinout) and due to the requirements of my project, I need to supply it with a 9V power adapter with a barrel connector, such as this one. I'm REALLY new to all of ...
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Powering Arduino and transistors with one power supply > 12V
So say you want to use transistors with your Arduino Nano to power components, which require greater than 12V. If your power supply is more than 12V, is there a way to safely use the same power supply ...
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Power 5v from l298n to 5v pin arduino
im using the l298n module, and 3x 18650 batterys (near 12v total), and supplying 12v to the 12v pin of the l298 module. Can i use the 5v pin of the module to power the 5v pin of arduino? Or i need a ...
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Digispark clone not recognised when plugged in
When I plug in my digispark clone the computer doesn't make any sounds or some kind of acknowledgement that it has been plugged in. Anyone know why this may be or is it just a dodgy clone?
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Power Source for Arduino
So I have SIM900 Shield and Arduino Uno and they have both power jack, is it possible to power one of them using one power jack and connect it's power with another? If it is possible, I sincerely need ...
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271
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Arduino Nano Fried on Music Reactive Led Strip
I'm doing a project that involves an Arduino Nano, a sound detection microphone module and a RGB Led strip (individually adressable leds). I also bought an accumulator so I can connect everything ...
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Hook Arduino up with thermal printer and power both externally
Disclaimer: I have no connection to adafruit.
A friend and me want to build a little project. We want to connect an arduino to a thermal printer and then print out little fortune-cookie like messages,...
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0
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173
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DS3231 High Power Consumption
I plan to use my Arduino with a small battery all the time so I don't want it to use so much power. I was checking power consumption of DS3231 with a multimeter, at first it was fluttering around 1 mA ...
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Press On Hold Off Power Switch
Hi everyone I am hoping someone here can help me.
I am trying to make an arduino turn my project on and off.Using a relay.
I am looking for it to act like a computer power button.
A short press to ...
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1
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Measure current across shunt resistor (Power Analysis)
I am trying to reproduce the side-channel power analysis attack described in this paper: https://pdfs.semanticscholar.org/7946/a8ee82658e2ffb017270331f220a55f5ace6.pdf for educational purposes.
The ...
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Low power error with serial connection
So I want to create an application where I can send data with a SIM-Module, and when it's not needed it should fall into a "standby-mode" because it's battery powered. But I always get this exact ...
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