Questions tagged [power]

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

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26 views

DHT11 stops working when power comes from a power supply board

I had a mini project with a DHT11, a temperature and humidity sensor, working perfectly on my Arduino UNO clone. Then, I bought a power supply board, that can feed the sensor with the 5V it requires, ...
-1 votes
1 answer
20 views

How to wire an ESP32-S2 Dev KitM-1 for power?

I'm putting an Espressif ESP32-S2 Dev KitM-1 into a project box. The box will have 12VDC power and a 5V buck converter for the Dev Kit. Do I need to use the USB port to power the Dev Kit or can I ...
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1 vote
2 answers
62 views

Arduino Nano: HUGE voltage drop on VIN

I am building a small automated indoor greenhouse. I want to use an Arduino Nano to control some LEDs und a fan (both through relays) and a water Grove Water Atomization module. Everything works fine, ...
-1 votes
1 answer
35 views

Does an 5V 2.1 A will fit for this Led Schema?

Hello I would like to create an Arduino protoype with Led WS2182B. I currently have Arduino NANO (not UNO, like in this schema) 65 Led WS2182B = Which gives me 3.9 Amp of suply for full brighness (65*...
0 votes
1 answer
102 views

USB-C to USB-C cable Arduino is not responding even not powered by this cable

Hi I want to connect arduino NANO to my laptop with Type-C (USB-C) ports (on below image left side [4] and other side 3). Now I bought a USB-C to USB-C cable, because it appeared to be the right tool, ...
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1 vote
0 answers
40 views

Putting samd-based board into sleep mode

I'm using a SAMD21G18A based board - the arduino zero, for a battery-powered wearable project (a type of computer mouse). I'm trying to figure out how to put the device to sleep, when it hasn't been ...
1 vote
0 answers
57 views

Nema 17 stepper motor speed problem

This code is quoted from here. May I know how to increase the speed of the NEMA 17 stepper motor further? I tried to increase the step speed to 2000rpm but it does not even work. It only works for ...
1 vote
0 answers
64 views

Arduino port not discovered with bootloader / Did I fry my board?

I have a Arduino Nano 33 BLE that I've been using for a while. I usually upload new programs to the board through USB with the board in a bootloader loop. The other day this stopped working. The board ...
-1 votes
1 answer
36 views

Using Analog Pins for Power

I'd like to power something needing 5V DC using the Arduino Uno analog pins. Specifically, I'm following the "Fun Plug-in Hack for Arduino UNO" section of this Adafruit tutorial. It states: ...
  • 99
2 votes
0 answers
66 views

Power requirements of a 7 Segment Display on Uno vs Nano

As part of a Simhub Dash set up I have been trying to get a 8 Digit 7 segment display working on an Arduino Nano. As part of my fault finding process I have gone back to basics and am using the ...
0 votes
1 answer
94 views

LDR circuit does not work with battery

This is pretty bizarre. I have a pretty simple circuit on a digistump. Just your regular voltage divider LDR. 10k resistor with ldr. When I measure the voltage at the analog pin and my computer is ...
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1 vote
2 answers
194 views

Can I power up an Arduino Uno via the 5 V pin while USB is connected at the same time?

I want to use Grbl to control a diy CNC machine. I need to communicate with the CNC using Grbl and this is done via the PC's USB port. So the PC's USB port is connected to the Arduino Uno which is ...
2 votes
1 answer
61 views

ELEGOO Mega 2560 USB and Vin simultaneously?

I'm powering my Arduino clone with an LM317 circuit that regulates Vin voltage to 10V (measured with a multimeter). While the Arduino is powered by USB only, everything works. When it's powered ...
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0 votes
1 answer
37 views

external power supply for servo motor attached to redboard arduino

I'm new to this page but I was hoping to get some advice on a servo motor arduino project I'm currently working on. I have a HS-815BB servo motor (4.8~6V, max stall current draw 6,000mA) and a Spark ...
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2 votes
1 answer
84 views

Achieving low power with Seeeduino Cortex-M0+ powered from 12V battery

I have Seeeduino Cortex-M0+, which is similar to Arduino Zero, both using Atmel SAMD21 MCU. It is powered from 12V battery directly to 12V PWRIN jack. Current draw for LED blink test is 18mA. I tried ...
0 votes
1 answer
75 views

Could I put an arduino in series with a battery charger?

recently in one of my projects I have wanted to make battery powered. I was wondering if I could connect the charger to the battery and the battery to the Arduino without blowing it. The battery is ...
1 vote
3 answers
293 views

Power saving configuration of unconnected pins

By default, all Arduino (ATmega328P) pins are configured for input without the internal pull-up enabled. This default seems to come from the AVR microcontroller itself. When it comes to saving power - ...
3 votes
0 answers
172 views

PCA9685 - Hardware problem with diode?

I'm working on a project, where I need to run several high-torque servos. For that I bought come of these PCA9685 boards. I hooked everything up with my arduino and connected an external 5V - max 3A ...
  • 161
4 votes
2 answers
591 views

Controlling a 5V fan and ultrasonic fogger with an arduino - do I need an external power supply?

I know the whole controlling a fan with an arduino thing is getting old, but somehow I still don't get it to work. Tried to answer it based on other questions but I am too much of a newbie to ...
1 vote
2 answers
90 views

Digital Pins Question

I am new to the world of Arduino and need a little bit of help. I have an Arduino Uno and I am trying to supply 5V to an actuator using the digital pins. It is my understanding that the board I have ...
0 votes
2 answers
51 views

Can arduino show the power drawn from its output pin on serial monitor? If yes, what code should I use?

I want to know is it possible that arduino can show how much power my prototype is drawing from arduino and if it can what would be the code for that.
0 votes
1 answer
53 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.
2 votes
1 answer
55 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 ...
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1 vote
0 answers
99 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 ...
  • 161
1 vote
0 answers
109 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 ...
  • 11
1 vote
0 answers
83 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 ...
  • 119
0 votes
2 answers
832 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
0 answers
169 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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2 votes
1 answer
1k 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 ...
  • 315
1 vote
1 answer
136 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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2 votes
0 answers
48 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
1 answer
65 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
0 answers
44 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 ...
  • 315
2 votes
1 answer
70 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 ...
  • 315
2 votes
0 answers
88 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 ...
  • 51
0 votes
1 answer
567 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 ...
  • 255
1 vote
1 answer
247 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 ...
  • 870
0 votes
2 answers
53 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
2 answers
117 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
1 answer
45 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
2 answers
105 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
0 answers
153 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
1 answer
140 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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1 vote
0 answers
76 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 ...
  • 11
2 votes
1 answer
130 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
0 answers
22 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
1 answer
205 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
1 answer
63 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
1 answer
80 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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1 vote
1 answer
28 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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