Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
854
questions
-1
votes
0answers
24 views
How can I power two muscle wires on the same battery? [closed]
Using Arduino Uno, have a four AA battery pack. Using muscle wire/flexinol/SMA wire with a MOSFET on digital pin 9. Works great.
I want to add a second wire on pin 10. The wires would alternate "...
0
votes
1answer
29 views
Where does the 5v Output power on the Arduino uno come from?
I am wondering where the extra 5v output power on the Arduino uno come from. Is it directly from the atmega328 microcontroller or from the external power source (usb or 9v battery). Thanks.
0
votes
0answers
30 views
What plant species generate the highest amount of electricity? [closed]
I just want to ask which plant species produces high amount of electricity. I'm very confused with the units that's why I don't know which species produce the highest amount of electricity. Also, can ...
2
votes
1answer
42 views
Can a power cut damage the software?
When unplugging the power source of a device that is writing some data "A" to an SD card, also other data "B" might get corrupted. (This is detailed here.)
Regarding Arduino ...
1
vote
0answers
15 views
Arduino UNO and PCA9685 - Problem with external power supply
I am totally desperate and hope you can help me.
I've been building a project for a while where I have to control several servos. For this I bought some MG996R servos and a PCA9685 16-Channel Servo
...
1
vote
0answers
23 views
Arduino and PCA9685 - Suddenly stopped working
I'm using an Arduino Uno and a PCA9685 board to run 4 servos (of type MG996R).
For that, I set up the following connections:
SCL -> SCL
SDA -> SDA
Ground -> GT
VCC -> 3.3V
As the servos ...
1
vote
0answers
50 views
Servos "jump to fixed position" at startup when powered by external power supply only, but not by board
My question is about something that is happening ONLY when I use external power supply. When I use the power from the Arduino Mega directly, there is no problem. However, I need to use an external ...
0
votes
2answers
87 views
How do I find out the maximum current through VIN on a NodeMCU board?
I read this answer https://arduino.stackexchange.com/a/51878 to a different, but related question. It seems like VIN on the NodeMCU is directly or via diode connected to the USB connector.
Image ...
1
vote
0answers
64 views
Power Arduino MKR GSM 1400 via VIN
I am working on a project with Arduino MKR 1400 GSM and I would like to power the arduino board using an external power source (https://www.reichelt.de/raspberry-pi-netzteil-5-1-v-3-0-a-usb-type-c-eu-...
1
vote
1answer
162 views
How to power ESP32 with 230V AC
I want to power ESP32 with 230V AC and I don’t know how to do it. The requirement is that it must never overheat. What components should i use? The ESP will be in small space with no airflow. Will it ...
1
vote
1answer
86 views
Mounting an Arduino inside a PC
I want to mount an Arduino Pro Micro inside my PC, hooked up to the PC's USB.
I don't want to have external cables for this, but have it neatly cabled inside.
My motherboard has USB connectors with 9 ...
2
votes
0answers
42 views
Arduino compatible ESP32 and ESP8266 board power consumption at sleep state
I have data on smaller modules with ESP32 and ESP8266, but can't find anything reliable pertaining to the whole board power consumption (current) with 12V input and microcontroller at low power or ...
-1
votes
1answer
49 views
Arduino Sleep to conserve battery - How to intergrade it to existing sketch - HELP pls
My sketch below is simply using a touch sensor to activate a servo motor to go from from initial position 0 to 180 then back to 0. then I want the Adruino NANO to go to sleep to conserve some battery ...
1
vote
0answers
39 views
Arduino UPS without reset
I’m trying to figure out how to make arduino UPS (when the power goes down it should not reset the arduino). Or preferably buy something that will do that for me. I found this, but Im not sure of it ...
2
votes
1answer
62 views
ESP32 powered for atleast a year
How to power esp32 board this one with soil humidity sensor that sends data to server via wifi every 30 minutes for something around a year on battery? What battery type and capacity should I use for ...
2
votes
0answers
45 views
Low Power, SD Card module and SCK
in order to minimise power consumption in a project using the Arduino Nano, I need to set pin D13 to HIGH after using it as SCK for transferring data to an SD card module (I use the SD.h module. I ...
0
votes
1answer
171 views
What is the correct way to externally power a MKR 1010 WiFi
I'm a little confused by the powering arrangements of the MKR 1010 WiFi. I need to power it on a breadboard from an external power supply. I will not be using a LiPo battery and I need it to work when ...
1
vote
1answer
188 views
Pro Mini - Using RAW pin for 3.3v input
I design a PCB that one of its components is a 3.3v Pro Mini. Since I want it versatile regarding powering the PCB (3.3v or 5.0v) I want to know if it is a good practice to supply 3.3v to Pro Mini's ...
0
votes
2answers
49 views
Dropping a 75V power supply to power an Arduino Mega
I'm looking to power an Arduino Mega using this IPC-5 power supply from Teknic since I will have a free port (the other powers a servo). I would like to use this extra port to power my Arduino rather ...
1
vote
2answers
106 views
Can Arduino take 19.5 V
I have a 19.5 V power adapter, can I safely connect it to my Arduino? I don't want to damage it. It is very simple, just lights some LEDs, and I don't want to burn the LEDs either.
1
vote
1answer
33 views
Using External Power Supply Arduino Uno
I have an AA battery holder for 9V. Two wires come out of it, one for positive and another for negative. How can I wire it up to my Arduino Uno? It kind of looks like this.
2
votes
2answers
71 views
Higher than 12V Arduino Uno
On many tutorials I have looked at, they say that you should power your Arduino with a 5 - 12V external power supply, but on the Arduino, there is a voltage regulator. Is there anything wrong with ...
1
vote
0answers
49 views
USB and LM7805 both to power Arduino
I have high current usage For my circuit as you can see below (link):
I like to power Arduino when it is not connected to PC by USB Connection, So I want to add one external power supply and connect ...
1
vote
1answer
108 views
Measuring the battery level powering the arduino
I would like to power my arduino nano with a 9V battery, but I would also like to measure the voltage of the battery to know its charge level.
Can I use the MAX471 Voltage Current Sensor module by ...
1
vote
0answers
49 views
How to use 5v and 12v addressable led strip together
Hi guys I’m new to this forum and also not much experience about led lights question already asked but didn’t get any detailed answer I want to know can I provide working data signal to 2 different 5v ...
2
votes
1answer
79 views
12V 28BYJ-40 motor is not generating enough torque
I am attempting to use a stepper motor to rotate one of my split-flap displays. However despite the thing the motor is rotating weighing probably half a pound, it struggles to do so. It really can ...
1
vote
0answers
21 views
DC Motor Shuddering
I am testing my BTS7960 Module with my UNO for bi-directional rotation of DC Motor. I am using a small DC motor as a test (like the one here) and I am powering the UNO via USB cable. The problem is ...
0
votes
1answer
46 views
does EEPROM reset itself when a new code is uploaded?
I have a Nodemcu with which i'm doing a project. So whenever there is a power loss i want values of some of the variables to not be reset, because of that im trying to store the values in EEPROM of ...
1
vote
1answer
50 views
First Arduino Project - Need Advice (powering WS2812B LEDs)
I'm making a long LED display made up of 3 (8x32) LED matrices to go inside of a car. I can't seem to find any in-depth guides on this sort of thing. If anybody has examples that they would like to ...
0
votes
1answer
43 views
Switching 4.2V circuit with 3.3V Arduino GPIO
I am trying to learn about MOSFETs and see this p channel MOSFET and this tutorial. I am trying to use a 3.3V arduino GPIO pin to control a load that is powered from a 4.2V battery in much the same ...
1
vote
1answer
24 views
Servo noise during program flash on Arduino
I'm running serveral servos using a driver A4988 and external power supply. Everything works fine.
I've just noticed one issue that I can't explain.
As soon as I upload a new program version on my ...
2
votes
0answers
80 views
Help needed with driving multiple stepper motors on arduino UNO
I am brand new to Arduino but have good experience with Raspberry Pi's and Microchips.
My problem is that I am having trouble driving many stepper motors at once. I am using the AccelStepper library(...
1
vote
2answers
121 views
Best way to add external power supply when main PSU is a solar charge controller?
I have a 12V 20A Solar Charge Controller (which is part of my existing Solar Panel System Setup connected to a 12V Sealed Lead Acid Battery) that I will use to power up some pumps with the help of ...
0
votes
1answer
39 views
Is it possible to use the same power source for the arduino and a high current
I've need to control some leds which draw 300mA with an arduino (actually an atmega) and after some searching I think the following is the circuit I need, but I'm not really sure if the power source ...
1
vote
0answers
42 views
L298N Motor Driver not working
I am using a L298N motor driver to connect a motor with NodeMCU. But i did a few tests since a few tests while learning how to control it now when i connect it the motor doesn't even work. Then i ...
1
vote
5answers
1k views
Running Arduino mega on 5V power supply
I'm wondering if I can run Arduino mega on 5V power supply, even though it's recommended for 6-12V. USB has only 5V right, will it be a problem? I expect to draw quite a lot of power from the 5V pin ...
2
votes
2answers
113 views
How to split 12V power suply to arduino and led matrix panel
I'm trying to build my Arduino project with Arduino mega and led matrix panel. I'm wondering what power supply should I buy, my first thought was to power the matrix panel from a 5v Arduino pin, but I ...
0
votes
1answer
102 views
How to work with WS2812B 16x16 matrix panel from aliexpress
I'm completely new to Arduino, and I want to build the project using an LED 16x16 matrix, but I don't know where to start. On the internet, I keep finding these custom matrix panels and they aren't ...
1
vote
1answer
117 views
DS3218MG Servo - Not working with power supply
I'm trying to run my DS3218MG Servo Motor with an external power supply and my arduino nano.
I'm using the following code:
#include<Servo.h>
Servo Myservo;
int pos;
void setup()
{
Myservo.attach(...
2
votes
2answers
103 views
How can I share one power supply between an arduino and servos?
I'm trying to power an arduino and a few modules (RF receiver, two servos, and a laser diode) through one power supply.
I get jittery/unresponsive servos when hooked up in the following configuration:
...
1
vote
1answer
103 views
Current difference between pinMode(pin, INPUT_PULLUP) and digitalWrite(pin, HIGH)?
Does pin 5 or pin 6 use more power if they're just being used as a signal to an external device?
pinMode(5, INPUT_PULLUP);
pinMode(6, OUTPUT);
digitalWrite(6, HIGH);
.
EDIT: Thanks to some links ...
1
vote
0answers
138 views
Power down NRF24 to conserve battery life using MOSFET
I'm using a Pro-Micro to send messages using NRF24 module from a remote location, using batteries (later on, will be recharged using solar panel).
To conserve power, Pro-Micro wakes up every 30 ...
0
votes
1answer
26 views
Can I run 3 motion sensors with a voltage regulator?
I want to power 3 hc-sr501 PIR motion sensors with a voltage regulator that can output 5v-1A.
If I make such a system, will there be a noise?
2
votes
2answers
64 views
4 Pelteir Plate Water Bottle wired to Arduino Uno
Note - I plan to use the Arduino Starter kit to make this project.
Hey everyone,
I've had an idea for a project recently and I would like to get some insight on its plausibility. Is it possible to ...
0
votes
3answers
132 views
Short circuiting GND and power pins
I have created an arduino shield and i want to measure the voltage between the GND pin and 5V pins, to see if i see a voltage difference between the two points, in order to test if my pcb is fine.
My ...
0
votes
2answers
152 views
Float to int conversion not working right in method using varargs
I am trying to convert a floating point number to an integer, but it seems like the conversion is not working properly.
I am using the math library to calculate the power of 10 based on the number of ...
1
vote
1answer
82 views
Ok to Connect 2.9V Stepper to 3.3V pin?
So I have a stepper motor that's rated for 2.9V and 0.8A and I connected it to a L9110 Driver and I wanted to drive it with my arduino. But I don't know how to drive it safely without damaging the ...
1
vote
1answer
152 views
What is the best way to power the ESP32 from a battery?
I am making a temperature sensor that can go in a freezer and I am trying to figure out what the best method is.
My research has taken me all over the place an I can't seem to find a straight answer. ...
1
vote
1answer
995 views
How to put Arduino Nano in low power sleep mode (<0.05mA)
I'm trying to put an Arduino Nano in low-power mode using this guide: Arduino Low Power - How To Run ATmega328P For a Year On Coin Cell Battery.
The article suggests 3 things: use the Low-Power ...
0
votes
2answers
87 views
How to use a push button & transistor as a kickstarter for power supply?
My goal is to save energy, and I intend to do so by powering a chip with itself, and cut power whenever unnecessary. The best image I can have is of a startled monkey who jumps on the branch, screams ...
