Arduino

Questions tagged [power]

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

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Mon powerbank s'éteint tout seul après 2 minutes quand je branche mon téléphone [closed]

Bonjour. Mon powerbank s'éteint tout seul après 2 minutes quand je charge un appareil avec alors que le powerbank est plein. Et il se charge parfaitement J'aimerais savoir pourquoi il s'éteint tout ...
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1answer
46 views

How to Set the Control Register on the DS3231 RTC module for Arduino UNO R3?

I am using the DS3231 RTC connected to an Arduino UNO R3 for a project. I won’t go into detail, but I need to save power, therefore I am using the DS3231 Alarm Interrupt to wake the Arduino from sleep....
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0answers
21 views

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 ...
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2answers
35 views

Nodemcu powering with 5.2v and 2A?

I bought a this voltage regulator . DC-DC 5v 8A voltage regulator. ıts supported 8-35V input voltage . And i want to use this with 12v power supply. But i searched on the internet . Nodemcu max amp is ...
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2answers
38 views

How can I power an ESP8266 using a 9V 1A barrel connector power supply?

I have a Huzzah Feather ESP8266 (pinout) and due to the requirements of my project, I need to supply it with a 9V power adapter with a barrel connector, such as this one. I'm REALLY new to all of ...
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0answers
5 views

Stabilize voltage input for Arduino nano on a drone [migrated]

I am doing a small drone project, and the 8V battery provides power to both the motors and the Arduino Nano. I expect a lot of noise from the motors, however I assume that the Arduino Nano power ...
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0answers
42 views

My motor driver shield l239D is making noise

Hi I am using an arduino UNO board stacked with a motor driver shield l239D and I am trying to only run 4 DC motors however when i put this code my board starts beeping and I dont know why. And none ...
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2answers
23 views

Powering Arduino and transistors with one power supply > 12V

So say you want to use transistors with your Arduino Nano to power components, which require greater than 12V. If your power supply is more than 12V, is there a way to safely use the same power supply ...
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1answer
32 views

Power 5v from l298n to 5v pin arduino

im using the l298n module, and 3x 18650 batterys (near 12v total), and supplying 12v to the 12v pin of the l298 module. Can i use the 5v pin of the module to power the 5v pin of arduino? Or i need a ...
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1answer
31 views

Code uploads successfully on esp8266-01 but doesn't run

I am using esp8266-01 board. It was working fine few days ago, the codes uploaded and ran successfully. But now that I upload code to it, it gets uploaded successfully but it doesn't work. I am using ...
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2answers
37 views

Digispark clone not recognised when plugged in

When I plug in my digispark clone the computer doesn't make any sounds or some kind of acknowledgement that it has been plugged in. Anyone know why this may be or is it just a dodgy clone?
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1answer
24 views

Power Source for Arduino

So I have SIM900 Shield and Arduino Uno and they have both power jack, is it possible to power one of them using one power jack and connect it's power with another? If it is possible, I sincerely need ...
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0answers
10 views

Reading a datasheet for power requirements - regulator vs positive supply [migrated]

I'm trying to interpret the attached datasheet to figure out how much power to give this sound board from adafruit: https://www.adafruit.com/product/2220 I was hoping that the sound board could ...
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1answer
70 views

Powering Arduino MEGA 2560 safely without computer [closed]

How can I safely power my Arduino MEGA 2560 and have it run programs without being connected to my computer? If I am actually able to do so I assume that means it needs a new external power source, ...
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1answer
36 views

Arduino Nano Fried on Music Reactive Led Strip

I'm doing a project that involves an Arduino Nano, a sound detection microphone module and a RGB Led strip (individually adressable leds). I also bought an accumulator so I can connect everything ...
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1answer
37 views

Hook Arduino up with thermal printer and power both externally

Disclaimer: I have no connection to adafruit. A friend and me want to build a little project. We want to connect an arduino to a thermal printer and then print out little fortune-cookie like messages,...
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34 views

Powering LED strip with Power bank (Arduino UNO)

First time ever working with Arduino UNO. I'm trying to power my RGB LED strip (addressable 5050+WS2812 RGB 5V IP20) via a Power bank (2x USB-A. One port's max 12 V DC - 1.2A, 9 V DC - 1.6A, 5.1 V DC ...
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1answer
53 views

Is it possible to supply Arduino nano with LED-stripe from 12V [closed]

Arduino max amperage is 200mA with 5V supply. But I can connect arduino with LED-stripe to one 12V 40A power supply in parallel. It gives most balanced power consumption between LED-stripe and arduino ...
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0answers
27 views

DS3231 High Power Consumption

I plan to use my Arduino with a small battery all the time so I don't want it to use so much power. I was checking power consumption of DS3231 with a multimeter, at first it was fluttering around 1 mA ...
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2answers
60 views

Press On Hold Off Power Switch

Hi everyone I am hoping someone here can help me. I am trying to make an arduino turn my project on and off.Using a relay. I am looking for it to act like a computer power button. A short press to ...
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1answer
38 views

Measure current across shunt resistor (Power Analysis)

I am trying to reproduce the side-channel power analysis attack described in this paper: https://pdfs.semanticscholar.org/7946/a8ee82658e2ffb017270331f220a55f5ace6.pdf for educational purposes. The ...
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0answers
12 views

Wich power supply should I get? ws2812b 5m [duplicate]

I have a ws2812b 5v 5m led strip and I don't know wich power supply should I get. How much ampers I must have.
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1answer
47 views

Low power error with serial connection

So I want to create an application where I can send data with a SIM-Module, and when it's not needed it should fall into a "standby-mode" because it's battery powered. But I always get this exact ...
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2answers
47 views

Powering the Arduino with a battery and reading the battery voltage

I am trying to display the battery level as it is being used to power the arduino. I have tried powering the arduino through the USB and the battery voltage is read accurately, when compared to the ...
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0answers
24 views

Question about whether 9v power vs usb power affects tasks

I made a lock with a servo and keypad with RGB LED and when I use my computer to power the lock when it unlocks it stays that way, but when it is running on the 9v battery the it unlock then locks ...
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1answer
49 views

24v LED strip with common anode?

I have a 5m strip of 24v tunable white LEDs and I'm trying to figure out what I need set it up. There's a pad for V+ and then one for brightness and one for warmth. If I plug the V+ in V+ on a 24v ...
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1answer
47 views

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 ...
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1answer
46 views

Arduino ds3231to TM1638 problems,alarm clock project

Good morning, I am coding an alarm clock on arduino by using a DS3231 and a TM1638. The code works and the time updates in the serial monitor,although the time doesn't update on the tm1638. I'll ...
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1answer
68 views

Arduino Nano IoT Power Consumption

I am trying to reduce the power of my Arduino Nano IoT. I would like to run it using a battery over a longer time period. I thought this would be possible when putting it to sleep most of the time. ...
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0answers
85 views

Reading I2C data from SW6106 register

I am using the SW6106 powerbank IC as an I2C but no matter what I have tried I couldn't read something other than "FF". Datasheet for the IC. Timing diagram for reading data: Timing diagram for ...
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1answer
42 views

Determine if Arduino is rapidly pulsed on and off several times

Greetings fellow humans! I've set myself the task of ascertaining whether an Arduino has been rapidly power cycled to force it into a setup state, a feature common with many IoT devices. So I ...
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1answer
142 views

How to assign an interrupt to a button press with an ATtiny? (interrupt not fired with my code)

(Here is finally a solution). I'm using the following code on a ATtiny45 to assign an interrupt to a button press (pin #7, PB2, INT0). However the LED doesn't blink when the button is pressed, as if ...
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2answers
80 views

How to deep sleep ATtiny/ATmega (to run for years with batteries) but still detect a button press?

Question (TL;DR): what is the optimal method to deep sleep (to run an ATtiny45 or ATmega on batteries for 1+ year) but still be able to detect a button press? Is it possible to deep sleep until a ...
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2answers
37 views

Can I use laptop USB port to power Nodemcu if every port used

I wonder if a laptop USB port is enough or I have to use an external power supply if the NodeMCU under heavy load. Here is my list of sensors and port used. 3.3V 3.3V D1 to D7 A0 GND Sensors: ...
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4answers
84 views

wake from powerDown to check sensor then put back to sleep

I am using an Arduino Pro Mini with various sensors. I am powering it with 2 3.7v 3400mA batteries which I recharge with a solar panel. I take a reading from the batteries and if the reading is ...
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2answers
49 views

Common button on two Arduinos and two computers

We have two computers giving two presentations that need to be triggered in sync. I know how to send the space button via Arduino, but I want to check it will be safe for the computers. If each ...
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3answers
74 views

Does a pulldown resistor use less battery power than a pullup resistor?

I am designing a circuit connected to a simple open-close sensor, like a switch. For ease of construction, the circuit with the sensor switch closes to ground, and uses a 1 MΩ pullup resistor to Vcc ...
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2answers
176 views

12V but what Ampere?

So if my arduino will draw around 800mA @5V and the dc-dc buck converter around 266mA @5V plus solenoid 1.2A @12V, is it a good idea to get 12V 4A (48W) power supply? Since Filip Franik told me that ...
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1answer
21 views

Arduino uno + 5 IR obstacle sensor

I have IR sensor with current draw 100ma i have to connect 5 of them is i can connect all 5 with arduino directly or i have to use external power suplly for them
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0answers
128 views

Arduino-Controlled LED Matrix issues

I am making a 20 x 15 LED matrix, and am having some super annoying problems. I was hoping you all could help me find some answers. It is very important to note that I am following BitLuni's video ...
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1answer
47 views

Floating power supply for Arduino - Is it still connected to the USB ground?

I am trying to power my Arduino Mega 2560 from a benchtop power supply. I plan to essentially feed in a 9V supply directly on the Vin pin and connect the GND pin to the floating ground pin on the ...
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1answer
40 views

Can I power Raspberry Pi 3 via 3V3 and GND pin? [closed]

Can I power my Pi 3 using the 3v3 pin (pin 1) and GND pin (pin 6)? Also, if I want to protect the board from power surges can I just put a fuse between my power supply and the 3v3 pin? Thanks in ...
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1answer
24 views

Circuit with a tip120 works with a Led but, don't with a vibrator motor

I have 2 Arduino Nano's. One with RF transmitter and the other with an RF receiver of 433 MHz and both have two 3v vibration motors. I want one Arduino to send a string to the other Arduino to let him ...
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1answer
42 views

Running many devices on 5V pin. How to provide external power

I'm using my Arduino DUE 5V pin to power a lot of sensors and I'm worried about the drop in current. I'm powering the board using the USB port. Is this the correct way or is there a different way of ...
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0answers
39 views

HC-SRO4 always returns zero no matter what I do?

Wondering if it's the sensor or the code? can anyone help? I've used the code here /* HC-SR04 Ultrasonic Sensor with LCD dispaly HC-SR04 Ultrasonic Sensor VCC to Arduino 5V GND to Arduino GND ...
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2answers
27 views

Push Button to Drive Power to Servo

I am currently doing a project for a class which uses a few other components such as an LCD, a servo, and such. I want to use a button which acts as a circuit breaker on the Vin of the servo in which ...
0
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1answer
141 views

Feeding microcontroller and linear actuators (motors) with the same power supply

I have already made a diagram using a motor controller. I want to use only one power supply to feed arduino and motors. I want to use MDD10 dual motor driver. The details of the actuators each one is:...
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0answers
50 views

LowPower.idle isn't waiting

I am trying to have my Arduino wait in a low power idle state given by the LowPower library made by rocketscream on an Uno. However, when I try to have it wait for 8 seconds, it seems to not pause at ...
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3answers
129 views

Arduino Uno not working after Short-circuit

While wiring up my new Arduino Uno R3, I accidentally shorted the 5V pin and the GND pin (for less than a sec). It was powered by a 12V 500mAh power supply through the Arduino DC power jack. . The ON, ...
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3answers
143 views

Powering SIM800L

With peak consumption at 2A, the SIM800L needs much more current than can be supplied by an Arduino or NodeMCU. What is the best strategy to power this module, considering that you have access to a ...

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