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Questions tagged [power]

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

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How to tell if Uno R3 mega16u2 is dead after voltage regulator blew up (and removed) - still draws ~250mA via USB, polyfuse is hot

When powered there is a slight smell of burning electronics. The polyfuse gets hot. Part U1 (NCP117ST50T3G or compatible, visibly damaged) has already been removed from the board. It doesn't enumerate ...
Johannes's user avatar
-2 votes
1 answer
90 views

Is it possible to power an Arduino and a bulb from the same source without a risk [closed]

Can I power the arduino and a bulb from the same power souce while controlling the bulb by a relay driven by arduino? the bulb is using 6W, if important. Did I connect the ground wire and the positive ...
playmobox's user avatar
0 votes
0 answers
43 views

Power supply on Vin for ESP8266 Amica nodemcu v2

My ESP8266 nodeMCU v2 Amica runs fine if I power it from my computer with a micro USB cable. I successfully uploaded a sketch (extended Blink) and it is doing fine. However, if I power the board with ...
Hans St's user avatar
-1 votes
1 answer
58 views

How to power 2 MG996R towerpro servo

I am a beginner and tried powering MG996R Tower Pro (180 deg Metal Gear) Servo from Arduino UNO and ended up hibernating the host PC. I want to power 2 such motors (in parallel configuration) for lets ...
Aditya Jain's user avatar
1 vote
1 answer
96 views

Code review for timer using RTC and OLED screen

I am building a small art project to display my current age with an accuracy of 1/100th of a second. I am using a XIAO SAMD21, a DS3231 RTC, and a 128x32 OLED screen. Here is what it looks like right ...
Mir's user avatar
  • 113
1 vote
1 answer
105 views

Increase in power consumption after brown-out detection (BOD)

I'm working on a low-power energy harvesting project, where I'm considering using an ATtiny85 to perform some minor tasks. The ATtiny is put in Power Down mode most of the time and does not consume ...
hmf's user avatar
  • 11
0 votes
1 answer
52 views

ATtiny25 - assembly - BOD disable for sleep mode - error [closed]

If I understood the AVR instruction manual correctly, the ATtiny 25 can disable the BODlevel2 fuse by software, but when compiling with Studio 7 (version 7.0.132), I get the error "Undefined ...
Laur Hus's user avatar
1 vote
2 answers
67 views

6 V high-torque servo won't function with motor shield

I have only ever been able to get this servo to “somewhat” work when connected to the 5 V pin on the shield, the ground on the shield, and the signal line attached to whatever pin. But 5 V is not ...
ConnorC's user avatar
  • 11
-1 votes
2 answers
132 views

How can I get servos to not brownout my Arduinos and power supply?

I have a problem with a project where one servo is resetting (browning out) two Arduino Pro Minis running 3.3v/8mHz. The two Arduinos are connected by SoftwareSerial on pins 9 and 10 and the slave ...
Charlie Nicholson's user avatar
3 votes
1 answer
175 views

NodeMCU V3 GOT OVERHEATED AND DIED

My NodeMCU V3 got overheated and died. Please help me figure out what i did wrong. Brief Desrip: Project is an RC Car on ESPNOW Protocol. Transmitter setup have an Arduino Nano to take values from Two ...
NonTechGuyinTech's user avatar
2 votes
0 answers
42 views

Confusing language on arduino docs about powering via 3V3/5V pins

I'm reading about powering alternatives for the arduino board, and I have run across two confusing sentences in Section 5, powering via 3V3/5V pin. First, it says: 3V3 and 5V pins can also be used as ...
Johnny Dollard's user avatar
1 vote
2 answers
141 views

Arduino UNO Power interruption

Do you have to upload the UNO after the applied power is disconnected? Does the UNO retain the code without any power? And when the power is disconnected, if the code is retained, will the timers ...
Woodenfish's user avatar
2 votes
0 answers
83 views

WiFiNINA Reseting Arduino Nano IoT 33 When Powered Externally

This is puzzling me: if I power my Arduino IoT 33 Board from USB, everything runs smoothly. Now, if I power it with 5V on Vin, the board resets as soon as I call WiFiNINA's WiFi.begin(ssid, pass). Of ...
Rafa Borges's user avatar
2 votes
3 answers
524 views

Run Arduino Uno with battery AND use 5V output

Newbie here: I built a working binary clock with my Arduino UNO R3, see Picture 1. From my understanding the power supply for the Arduino itself is via USB, and I use the 5V output to supply power to ...
Krawabbel's user avatar
4 votes
0 answers
56 views

Can I use regular pins (Example: D2, A3, etc...) as serial (RX, TX)?

Python/Arduino Beginner here... I have a DFplayer I am trying to hook to my Arduino and I want to hook it up through the regular pins instead of the RX and TX pins, but I've not been able to find ...
prestonferry's user avatar
1 vote
1 answer
497 views

How much maximum current do the Arduino Wemos D1 (R1 & R2) consume?

I have been powering my WeMos D1 R1 and D1 R2 Arduinos (with ESP8266) using a simple USB cable connected to a standard charger whose rating is 3.1 amps. Is this sufficient to charge two such Arduino ...
Chiwda's user avatar
  • 252
1 vote
2 answers
97 views

I'm planning on using 2 arduino boards for my project. Should I use 2 voltage regulators for project or use 1 for both?

For context, my first board would contain a motor circuit with an L298N motor driver while my second contains a controlled heating system that uses 2 relays with PTC heating elements, DHT11 sensor, ...
Kid's user avatar
  • 21
1 vote
1 answer
143 views

Powering a NodeMCU as well as a GSM module

I'm trying to connect a GSM module(sim800L) with a NodeMCU to execute remote operations. But the GSM module cannot be powered using the NodeMCU. So, what are the other ways to power the board as well ...
vasantha raj's user avatar
1 vote
1 answer
58 views

Program work when used Delay() but same program doesn't work with millis()

I'm running a dc motor using esp32 and mosfet by taking readings of IR. Program works fine when used delay() but same program doesn't work when uploaded using millis(). //This uses fixed delay() // ...
Akash Patil's user avatar
1 vote
0 answers
93 views

ESP8266-01S only coming back from DeepSleep every 2nd time

I'm using an ESP8266-01S for a battery-powered project. The ESP is in DeepSleep, a doorbell relay pulls RST to GND, bringing the ESP to life to do some stuff, before going back to DeepSleep. My ...
Jan's user avatar
  • 141
1 vote
0 answers
71 views

Running a 5V, 4pin pwm fan with Mega2560

I have a Mega2560 and would like to use it to power a single fan and display. The fan is a 5V fan that draws 260mA and I can't find power specs for this display. I can't find a clear answer for how ...
David Carpenter's user avatar
1 vote
0 answers
225 views

Arduino Nano 33 BLE power consumption optimization

I am working on building a sensor using Arduino Nano 33 BLE that will measure temperature using two thermistors and angle changes. The measured values will be transmitted over Bluetooth to a ...
Arseniy Tretyak's user avatar
0 votes
0 answers
42 views

channels on logic level shifter outputs high

so I have a logic level shifter which is TXS0108E ,I use it to shift the eps32 ouput volatge to 5v to be used with motor driver ,when I test it with multimeter , all the channels on the B side outputs ...
kamal MKA's user avatar
-1 votes
1 answer
40 views

How to produce multiple DC voltages for a single project with different dc requirements

I have a project that has 2 12V .2 amp fans, and 1 30 3 amp LED COB panel, and a 5 V Arduino. I was wondering if there was a simple method to power all of these devices from a 120 V wall outlet? As of ...
NoobEngineer123's user avatar
0 votes
1 answer
149 views

The Arduino UNO Pin 3V3 have OUTPUT 5V (measured with meter)

I just noticed that my original Arduino UNO on pin 3V3 have 4.98V output. That's odds. That pins should have 3.3V. So I measured the Vout on the voltage regulator LP2985-33DBVR where that pins is ...
tommy's user avatar
  • 29
3 votes
1 answer
322 views

Arduino | external power supply and USB at the same time

Arduino | external power supply and USB at the same time I have got an Arduino Mega 2560 project with many sensor and outputs. Right now I’m supplying it with an external stabilized 5V over the 5V pin ...
stevo's user avatar
  • 51
1 vote
1 answer
263 views

AA alkaline batteries on firebeetle?

I would like to power a dfrobot firebeetle 2 using 3 alkaline batteries. I tried connecting the battery pack to the GND and VCC, but the board does not seem to react. What pins should i connect the ...
Davy's user avatar
  • 121
1 vote
1 answer
548 views

ESP32 failing to read from DHT11, MH-Z19C sensors

I got MH-Z19C (CO2 ppm) (datasheet), and DHT11 (temperature) sensors from Ebay and followed instructions online to set it up with my ESP32 board (ESP32). I'm using a breadboard and 5V/3.3V power ...
Adam Cherti's user avatar
2 votes
1 answer
198 views

Wemos C3 Mini (ESP32-C3) does not run firmware unless connected to pc

I've been using ESP32s and ESP8266 for a few years now and I thought I'd give these little boards a shot, they were cheaper for Bluetooth/WiFi combo, and I don't need all the bells and whistles of a ...
Cody Sorgenfrey's user avatar
-1 votes
1 answer
188 views

Why can't my four batteries (6V) can't power this circuit while usb 5v from arduino can?

I have this circuit And I want it to power all the led rgb (100 in total), I want to make a independent portable circuit, so I don't have to use the usb power. The thing is when I use this circuit it ...
RodParedes's user avatar
1 vote
0 answers
150 views

How to lower the power consumption of this ESP32 during delay(500)?

The following code works. It does the following: wake up when pin GPIO0 is connected to GND (the pulse duration is 400 milliseconds) once every 10 wakings, I send the current index to a server with ...
Basj's user avatar
  • 398
-3 votes
1 answer
1k views

If Arduino digital pins can be used as power supply pins then why do we need VCC pins? [closed]

If Arduino digital pins can be used as power supply pins then why do we need VCC pins? VCC pins work the same as digital outputs , don't they? So why do we still need VCC pins to power components
Nathan Francisco-Ribeiro's user avatar
-1 votes
1 answer
59 views

Arduino Nano Doesn't Upload Any Code After Connecting It In Reverse (Rotated 180°)!

I've Made A PCB Which Includes An Arduino Nano. I Soldered Some Female Pin Headers Instead Of Soldering The Arduino Itself, So That I Can Easily Plug/Unplug The Arduino Board. It Was All Good, Until I ...
A_Asaker's user avatar
0 votes
0 answers
205 views

Atmega32u4: Reduce power consumption while keeping USB active

I have a USB powered board, that should consume as little power when idle as possible, while keeping the USB connection alive. The device only sends data to the host, doesn't receive any, so the ...
Dakkaron's user avatar
  • 229
-1 votes
1 answer
32 views

Driving APA102C strips from Mega 2560

I have written (cobbled together from code snippets) an Arduino program that pushes various patterns down 160 APA102C LED strips (5). I originally was using a 5V 40A power supply and everything worked ...
joebataz's user avatar
0 votes
2 answers
134 views

Lag in sensor reading when Arduino Powered with 12V adaptor

So I am trying to power an arduino to measure water flow. It works all fine and dandy when I am powering it with laptop, but when I directly power it with 12V 1.5A adaptor the readings take a second ...
Lord Voldemort's user avatar
0 votes
3 answers
157 views

Voltage drop when power from AA batteries

I am using a Arduino MKR 1010 Wifi board to control 4 servo (PS-1109MG). All the circuit is powered by 4 AA rechargeable batteries (1.2V * 4). Arduino is powered through the Vin port. Below is a ...
Adrian's user avatar
  • 11
0 votes
1 answer
445 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, ...
Joan Botella's user avatar
-1 votes
1 answer
80 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 ...
raspi's user avatar
  • 13
1 vote
2 answers
256 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, ...
meyer_mit_ai's user avatar
-1 votes
1 answer
138 views

Code does not run when Arduino is powered by AC adapter

I'm trying to implement the circuit as shown with an Arduino Nano. The project runs fine when powered via the USB port of the Arduino. However, the code freezes when connected to an AC adapter. When ...
KRP's user avatar
  • 11
-1 votes
1 answer
73 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*...
RodParedes's user avatar
1 vote
1 answer
763 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, ...
mehmet's user avatar
  • 287
2 votes
1 answer
829 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 ...
felix tan's user avatar
1 vote
0 answers
88 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 ...
Tyler Hartwig's user avatar
-1 votes
1 answer
411 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: ...
armani's user avatar
  • 99
2 votes
0 answers
120 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 ...
Byte Insight's user avatar
2 votes
1 answer
902 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 ...
user18345401's user avatar
2 votes
1 answer
249 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 ...
Ed. M.'s user avatar
  • 21
0 votes
1 answer
155 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 ...
Karen's user avatar
  • 9

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