Questions tagged [power]

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

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-1 votes
0 answers
18 views

How to connect a single power supply to 2 VCC?

How to connect a single power supply to 2 VCC? In a circuit not breadboard i want to connect 5V battery for both FS1000A and ATTINY13A
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-1 votes
0 answers
26 views

LED strip unexpected current consumption both when idle and in use

I bought the following LED strip https://www.amazon.ca/BTF-LIGHTING-Flexible-Individually-Addressable-Non-waterproof/dp/B01CDTEJR0 I found that even when no LED is lit at all, I have some ±100mA drawn ...
0 votes
0 answers
25 views

Used wrong power source which probably killed Arduino and OLED; want to know more about it

I hooked an OLED to my Nano like in the following image (to the right) and it worked fine, while being powered by USB. Now I wanted to try with a 5V regulated power supply module I would hook ...
-1 votes
0 answers
15 views

Connecting both a drone and breadboad/ESP32 simultaneously

I'm working on a prototype via breadboard to utilize the same power source for a pre-built drone to "share" for a breadboard to power an ESP32. For example, the power source would properly ...
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0 votes
0 answers
29 views

Arduino uno powersupply

Can I use a cellphone charger adapter (5V=2.4A) and USB cable A to B to power my arduino uno?, the uno controls my LED project.
0 votes
0 answers
30 views

Power supply for four 4-channel IRF540 MOSFET Switch modules

I am trying to control four 4-Channel IRF540 MOSFET Switches modules using an Arduino MEGA. I am having trouble in powering these boards and the Solenoid Values connected to them. Is it possible to ...
0 votes
0 answers
44 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 ...
  • 388
-3 votes
4 answers
121 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
-1 votes
1 answer
30 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 ...
0 votes
0 answers
45 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 ...
  • 219
-1 votes
1 answer
19 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 ...
0 votes
2 answers
91 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 ...
0 votes
3 answers
60 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 ...
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0 votes
1 answer
63 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
42 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
101 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
37 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
172 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
62 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
94 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
69 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
42 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
68 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 ...
1 vote
2 answers
374 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
99 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 ...
  • 21
0 votes
1 answer
68 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 ...
  • 9
2 votes
1 answer
100 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
90 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
385 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
238 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
629 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
93 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
61 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
62 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
62 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
193 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
159 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
106 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
1k 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
222 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
2k 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
169 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 ...
  • 173
2 votes
0 answers
49 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
70 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
47 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
117 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
101 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 ...
  • 49
0 votes
1 answer
750 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 ...
  • 265
1 vote
1 answer
283 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 ...
  • 898
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 ...

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