Questions tagged [power]

This tag is for questions regarding powering and/or power consumption of Arduino systems.

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15 views

Want know how to combine the follow arduino sensor codes to make them work together [duplicate]

This are the following code which code for accelerometer, vibration sensor ,ultrasonic sensor ,gsm and gps FOR ACCELEROMETER const int xInput = A0; const int yInput = A1; const int zInput = A2; // ...
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49 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 ...
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2answers
75 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 ...
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58 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-...
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1answer
80 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 ...
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1answer
83 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 ...
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0answers
23 views

Arduino MKR WiFi 1010 battery charge feature equivalent

so I noticed very interesting feature of Arduino MKR WiFi 1010 board. As they say in the product description Its USB port can be used to supply power (5V) to the board. It has a Li-Po charging ...
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0answers
40 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 ...
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1answer
47 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 ...
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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 ...
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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 ...
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41 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 ...
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1answer
108 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 ...
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1answer
183 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 ...
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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 ...
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2answers
105 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.
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1answer
30 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.
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2answers
67 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 ...
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0answers
45 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 ...
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1answer
105 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 ...
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0answers
46 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 ...
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1answer
72 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 ...
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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 ...
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1answer
43 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 ...
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1answer
48 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 ...
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1answer
35 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 ...
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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 ...
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0answers
69 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(...
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2answers
119 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 ...
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1answer
38 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 ...
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0answers
39 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 ...
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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 ...
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2answers
105 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 ...
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1answer
83 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 ...
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1answer
106 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(...
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2answers
101 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: ...
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1answer
94 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 ...
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0answers
117 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 ...
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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?
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2answers
62 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 ...
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3answers
118 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 ...
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2answers
110 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 ...
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1answer
80 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 ...
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1answer
135 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. ...
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1answer
676 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 ...
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2answers
83 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 ...
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2answers
66 views

Connect 12V 38A battery to SIM800C GSM Module

I have a gsm module that is rated for 12V and 1A. And I also have a drone Battery that is 12V and 38A. Would it hurt the gsm module If I connect it to this high power Battery? I heard It's voltage ...
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1answer
56 views

How the light brightness stays constant when we increase the frequency of stroboscope

Well I am trying to make a Stroboscop. I found this code at blow: and tried. It works normally. But if I increase the RPM so decrease the "strobeDelay" time, the brightness of the LEDs goes ...
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1answer
40 views

Arduino boards are not working with powerbanks!

I have used many Arduino boards with adapters and other power supplies. While connecting with a powerbank for portable projects I have noticed that the power goes off after a couple of seconds and ...
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1answer
68 views

Datasheet of arduino power jack

Can we find out about the parts that the arduino uses? I want to make a shield, and i bought the same power jacks. And i thought that there would be two pins, one for power, one for GND. However, it ...

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