Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
785
questions
0
votes
2answers
49 views
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 ...
0
votes
1answer
25 views
Arduino Uno with HC-SR04 Power saving
My Arduino Uno is powered by 9v battery to run 2 ultrasonic sensors (HC-SR04) and a buzzer.
I intend let the circuit run for at least a week.
Is there a solution to reduce power consumption / increase ...
0
votes
1answer
45 views
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>
...
0
votes
0answers
42 views
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 ...
0
votes
1answer
40 views
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 ...
0
votes
1answer
59 views
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://imgur.com/a/Nval6
https://www.homebrewtalk.com/...
0
votes
2answers
45 views
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 ...
0
votes
1answer
43 views
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 ...
0
votes
1answer
31 views
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 ...
0
votes
1answer
39 views
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 ...
1
vote
1answer
41 views
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 ...
0
votes
0answers
26 views
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....
0
votes
0answers
22 views
Feather will not work if GPS is attached
I have a feather huzzah, and a feather GPS shield. The feather will not accept program code while the GPS is plugged in. I have determined this is some sort of power issue. I have a battery connected ...
0
votes
1answer
24 views
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 ...
-1
votes
1answer
31 views
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 ...
0
votes
1answer
30 views
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....
0
votes
1answer
52 views
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(...
0
votes
1answer
31 views
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 ...
1
vote
1answer
47 views
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 ...
0
votes
0answers
35 views
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 ...
0
votes
1answer
56 views
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,...
0
votes
1answer
41 views
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 ...
0
votes
2answers
42 views
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 ...
0
votes
0answers
30 views
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 ...
2
votes
1answer
45 views
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 ...
0
votes
2answers
46 views
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 ...
0
votes
2answers
56 views
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 ...
0
votes
0answers
27 views
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 ...
0
votes
1answer
54 views
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 ...
-1
votes
1answer
40 views
Part identification [closed]
This may be a dumb question but i would like to know what this part is. Anyone who knows?
0
votes
2answers
99 views
sleep mode and watchdog at the same time
suppose a project with Arduino that we should save battery power, so we use sleep mode and also avoiding the Arduino of hanging and use watchdog timer. But the problem is here that when the Arduino ...
0
votes
2answers
44 views
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 ...
0
votes
1answer
41 views
ESP01 to DC Motor powered via Battery with Power Regulator
Hi I'm wanting to control a dc motor through esp-01 and to have it powered by batteries. To keep my esp-01 safe, I have found the esp-01 adapter to regulate voltage. I am wondering if anyone could ...
0
votes
1answer
168 views
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 ...
0
votes
1answer
33 views
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 ...
0
votes
1answer
79 views
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 ...
1
vote
2answers
109 views
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 ...
1
vote
1answer
276 views
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....
0
votes
1answer
29 views
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 ...
0
votes
2answers
95 views
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 ...
1
vote
2answers
55 views
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 ...
0
votes
2answers
28 views
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 ...
0
votes
1answer
123 views
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 ...
0
votes
1answer
61 views
Code uploads successfully on esp8266-01 but doesn't run
I am using esp8266-01 board. It was working fine few days ago, the codes uploaded and ran successfully. But now that I upload code to it, it gets uploaded successfully but it doesn't work.
I am using ...
0
votes
2answers
319 views
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?
0
votes
1answer
29 views
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 ...
-2
votes
1answer
83 views
Powering Arduino MEGA 2560 safely without computer [closed]
How can I safely power my Arduino MEGA 2560 and have it run programs without being connected to my computer? If I am actually able to do so I assume that means it needs a new external power source, ...
0
votes
1answer
120 views
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 ...
0
votes
1answer
59 views
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,...
0
votes
0answers
47 views
Powering LED strip with Power bank (Arduino UNO)
First time ever working with Arduino UNO.
I'm trying to power my RGB LED strip (addressable 5050+WS2812 RGB 5V IP20) via a Power bank (2x USB-A. One port's max 12 V DC - 1.2A, 9 V DC - 1.6A, 5.1 V DC ...
