Questions tagged [power]

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

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9 views

Mosfet REALLY slow closing speed [migrated]

I'm making a 400v adjustable buck converter, controlling it I'm using an ESP32, for some reason if I set the PWM frequency to higher than just 200Hz and a bit rate of 4, the MOSFET doesn't close in ...
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1answer
155 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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1answer
50 views

30v DC to 3.3V DC for Powering an ESP32

I'm trying to figure out the best way to convert 30v into 3.3v to power an ESP32, I have an outdoor light chain that runs on a 30v power supply, what would be the best way to step the voltage down ...
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2answers
46 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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0answers
9 views

LM2678 DC-DC Voltage Regulator, Output Overvoltage [migrated]

I tested the LM2678SX-5.0/NOPB integrated for use in PCB Board design. But while waiting to get a 5 Volt fixed output, I encounter a value like 7.4V. You can see the regulator circuit I designed in ...
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2answers
88 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
27 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
61 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
33 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
97 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
41 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
64 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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0answers
47 views

Can anyone suggest me a way to efficiently power my relay module using batteries? [closed]

I hve a very simple project where I have a ttp233 touch sensor which I'm using to control my relay module which inturn switches my fans on and off. The problem here is whenever there is a power loss ...
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1answer
25 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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0answers
30 views

What is the best way to cut power from an Arduino nano without actually unplugging it? [closed]

I’m looking to create an alarm system (which is basically just a sound played from a speaker that is triggered when a magnetic Reed door switch is broken). However, as this is part of an installation, ...
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1answer
45 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
68 views

Power supply issue

I have constructed a series circuit to power the arduino uno from a 12v to 14v battery. The battery fluctuates do to solar panel. The circuit continuously supplies 8.5 to 9.2v. The supply is ...
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1answer
28 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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0answers
34 views

NodeMCU power input

I have a node MCU and I'm powering it through the vin and gnd pins. I have a small question when I supply power from the vin pin and also connect the usb cable from my power bank the node MCU takes ...
0
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1answer
82 views

NodeMCU vin pin(5v) is not working

I'm a newbie on Arduino and NodeMCU so now I'm trying to run my relay module trough the NodeMCU v3 and so far I have wired them all respectively as the instruction below: NodeMCU 5v Relay D2 + ...
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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
50 views

How can I read data from power analyzer with arduino NANO through rs485

well I have this power analyzer. And I want read data with Arduino NANO, through rs485 here is product and here is the register table of this device. I am using boud rate 9600, no parity, slave 1 ...
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0answers
51 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
104 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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0answers
30 views

Want to decrease the number of power supplies from 4 to just one [closed]

Hello everyone I have 4 stepper motors 2 being nema 23 and 2 being nema 17 with nema 23 rated at 2.8 amps and nema 17 rated at 1 amp also the servos are tower pro mg995. I want to decrease the number ...
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1answer
37 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
30 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
985 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
101 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
41 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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0answers
52 views

ARDUINO NANO 33 BLE project

I am trying to measure power consumption in my ARDUINO NANO 33 BLE if it is awake mode or deep sleep ARDUINO NANO 33 BLE I will connect the temperature sensor to the Arduino and it will work every two ...
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0answers
36 views

issue with DVD drive stepper motor for 3d printer

Short version: 1: Is it possible to run just the stepper motors (pulled out of a DVD Drive) using either a 5v 2a mobile charger or a 9v battery plugged into the Ramps 1.6 power input? 2: what could be ...
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1answer
83 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
92 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
84 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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1answer
78 views

Arduino Loop stops running as soon as power is turned on

I am using the MU Vision sensor which is supposed to drive a stepper motor. The MU Vision sensor code works. The moment I turn on the power for the stepper motor power supply, the code stops. I have ...
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0answers
74 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
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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
59 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
89 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
81 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
74 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
107 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
205 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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0answers
23 views

Arduino Doesn't Work With Just Battery and Vin Pin [duplicate]

I'm currently working on a drone project, and I have a bit of a problem. I am using a motor driver for my propellers, but the motor only runs continuously when connected to the computer. I have the ...
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0answers
66 views

Audio Amplifier won't work on Arduino Nano

I am using an Arduino Nano with these speakers and these audio amplifiers. I've tested these both on an Arduino Uno, and I've tested the Nano with other sketches and on that pin, and they both work. ...
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2answers
73 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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0answers
83 views

DIY Arduino-powered 12V UPS suggestions | HELP NEEDED!

Firstly my wishes to whoever reading this piece of text, have a nice year and I hope that everyone is doing fine in this current pandemic and I think this is going to be a piece of the past very soon.....
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0answers
55 views

Power supply for servo motor [closed]

I try to built a snake robot. I used servo motors mg996r. Its Operating voltage is 4.8 V to 7.2 V and running current is 500 mA – 900mA. I used 4 servo motor. So I need a power supply that is 4*(900mA)...

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