Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
889
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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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1
answer
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Arduino Power Consumption
I am pairing an Arduino Uno along with both a HC-05 bluetooth module and a sensor circuit.
Show below is the circuit conditions as well as the circuit.
As far as powering up the system, I am ...
CommunityBot
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1
vote
1
answer
325
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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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2
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55
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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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2
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142
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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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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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231
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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 ...
CommunityBot
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0
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290
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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 ...
2
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1
answer
180
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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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0
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95
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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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1
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33
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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 ...
CommunityBot
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1
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2
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795
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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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0
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23
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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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379
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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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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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1
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101
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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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0
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435
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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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2
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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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1
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164
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Arduino Micro not providing regulated power
I have an arduino micro that works fine off USB. I need to power it from an external 12V power supply. When I connect the 12V supply to the adjacent VIN and GND pins, the arduino will not power up. ...
CommunityBot
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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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0
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99
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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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4
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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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231
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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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304
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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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2
answers
267
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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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274
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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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1
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5k
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How to stop uno from running program when powered on?
Does anyone know how to prevent the Uno from running the last program when it's powered on?
Many times I have changed hardware and wiring without clearing the program first. Then when I power it on ...
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Can I change VCC pin to 3.3V on a 5V Arduino Pro Micro?
I'm using a 5V Arduino Pro Micro (schematic).
For my project, I'm using the VCC pin to output power to an external device. I need VCC to output 3.3V to the external device. Can I open jumper SJ1 to ...
- 121
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3
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704
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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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4k
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How to send the MFRC522 RFID module into sleep mode?
I'm trying to get the power consumption of a MFRC522 RFID module down, currently while running it consumes about 4mA. There should be a way to put it into sleep mode, I just can't find any ...
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0
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461
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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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2
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83
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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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27
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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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548
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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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1
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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 ...
2
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1
answer
249
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Arduino due erase button and power switching
Last days I have been investigatin schematics of arduino due board. The purpose of proper understanding of schematics in crucial for me, beacuse I indend to build myself my own board with some minor ...
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586
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Arduino MKR GSM 1400: Can I tell from code if the power has tripped
Is there a way to tell if an Arduino MKR GSM 1400 has lost power and has to rely on the connected battery?
Ideally, I'd like to do this without adding additional circuitry. Alternatively, can I ...
CommunityBot
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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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2
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172
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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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115
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Powering LED Strip at both ends shorts my psu?
I've got a 200 LEDs strip of sk9822's hooked up to a 5V 8A power supply.
As expected, at full white, there's considerable voltage drop and the far end of the strip turns from white to amber.
I wanted ...
CommunityBot
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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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97
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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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1
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51
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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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1
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85
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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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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 ...
CommunityBot
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How to power board plus module with one battery pack
I'm someone who's very new to robotics and the physical side of computers (software guy) so apologies if this is a stupid question. I'm purchasing an Arduino Nano 33 IoT that I'll be using in ...
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162
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Are the GND pins of an Arduino identical to GND of its power supply?
What would happen if I connected a fan as shown in the following picture:
+12V is supplied by the power supply that also powers the Arduino.
GND, however, is connected to a GND pin of the Arduino ...
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209
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Will plugging in a 12v power supply in the wrong polarity to a CNC SHIELD fry my circuit or damage my power supply?
I'm currently in the process of making a DIY pen plotter using an Arduino CNC Shield and GRBL Code. Right now I'm connecting the power supply to the shield. I got a standard 12v supply and I cut off ...
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236
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Uno doesn’t get enough power from 5v barrel connector. Why?
I’m using a 5v 20a power supply run through a barrel connector into an Arduino Uno to control an LED strip. When only the barrel is connected, the green light on the Uno comes on but the yellow light ...
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3
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726
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How come my transistor doesn't work?
I have a TIP 120 to 229 NON 60V 5A transistor
I'm trying to use it to switch an electro magnet. Using the blink example to test it out:
// the setup function runs once when you press reset or power ...
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