Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
881
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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 ...
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0
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53
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How to reduce power consumption using ADC attiny arduino
i have finally created the code and it works perfectly with internal 8mhz crystal but when i shift to external 8mhz as per the systems demand, the current consumption during sleep mode stays between ...
0
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0
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18
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Power saving and pc interrupts on ATMega324PA
I have an ATMega324PA and I want to power down and only wake on CAN receive (working on int 0 successfully), on a schedule, on pcints on 6 digital inputs, and on serial receive - either serial0 or ...
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1
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1
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101
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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 ...
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2
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1
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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 ...
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1
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77
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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 ...
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107
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How to power LILYGO ESP32-S3 1.9" T-Display without USB?
Noob question, I'm sure, but - I have one of these little LILYGO ESP32-S3 1.9" T-Display boards. Linked up with my PC, downloaded my code, runs fine, but I can't get the thing to power up from ...
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59
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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 ...
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189
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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
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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 ...
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64
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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 ...
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1
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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 ...
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2
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93
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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 ...
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3
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70
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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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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, ...
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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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2
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123
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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, ...
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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*...
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202
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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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68
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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 ...
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108
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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 ...
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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 ...
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45
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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:
...
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2
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69
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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 ...
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2
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475
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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 ...
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2
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1
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112
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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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87
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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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106
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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 ...
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93
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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 ...
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3
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448
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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 - ...
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273
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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 ...
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647
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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 ...
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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 ...
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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.
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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.
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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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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
...
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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 ...
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120
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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 ...
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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 ...
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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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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 ...
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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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51
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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 ...
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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 ...
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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 ...
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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 ...
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117
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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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835
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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 ...
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300
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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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