Questions tagged [power]

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

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1answer
17 views

Can I use an internal clock on Wemos D1 Mini?

I have a working Wemos D1 Mini setup measuring temperature and sending it over wifi to my server. Now I'm using a battery powered unit, and playing around with power consumption optimization and how ...
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1answer
28 views

Extremely unstable analogRead() on Arduino Nano when powered from an external source

I'm doing a really simple project with an Arduino Nano and found a problem. The circuit is a simple temperature sensor and a tension read from an analog pin everything showed on a Nokia 5110 LCD. When ...
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0answers
27 views

Finding Correct JST Connector [closed]

I recently bought some 3.7V single cell lipos that came with a JST connector. I will be using them to power my arduino projects. I also bought a boost converter that has a JST connector. However, the ...
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2answers
51 views

Using Two Arduino to Lower Power Consumption

I am planning to build a water quality sensor with ph, temperature, and dissolved oxygen, conductivity. The power consumption looks like it will be very high especially due to the signal isolator, I'm ...
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1answer
30 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 ...
0
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1answer
36 views

Relay + Arduino uses too much power for battery to handle. Which solution is best?

You can see in my crumby schematic that I am using a Non-latching relay to turn on a 3A circuit (one of them arc lighters), which is powered by a 25C (supposedly) lipo battery. That same battery also ...
0
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1answer
32 views

Arduino Uno with HC-SR04 Power saving

My Arduino Uno is powered by 9v battery to run 2 ultrasonic sensors (HC-SR04) and a buzzer. I intend let the circuit run for at least a week. Is there a solution to reduce power consumption / increase ...
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0answers
17 views

Node MCU pins are showing leaking current/voltage on checking with tester (the tester is glowing when touching to nodemcu pins) [closed]

I had hooked up a nodeMCU and 5V solid state relay module with an HLK PM-05 power supply module being fed through 230V supply. The circuit is working fine except the HLK PM05 module dc output side is ...
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1answer
47 views

ESP01 to DC Motor powered via Battery with Power Regulator

Hi I'm wanting to control a dc motor through esp-01 and to have it powered by batteries. To keep my esp-01 safe, I have found the esp-01 adapter to regulate voltage. I am wondering if anyone could ...
0
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1answer
864 views

cannot get low power with Adafruit Trinket

I want to get as low power use during sleep as possible with an Adafruit Trinket. Based on results presented on various places in the internet (blogs etc), I expect to be able to go down to 50 - 100 ...
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1answer
22 views

Wemos D1 mini and JSN-SR04T-2.0: Type of power supply affects the sensor readings

Pretty similar to what is described here I have the strange problem that my sensor readings are affected by the type of power supply I use. Whenever I connect my D1 mini through USB with laptop ...
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1answer
428 views

Power supply affecting sensor readings ESP8266 and JSN-SR04T-2.0

I have an ESP8266 Wemos D1R2 Board with a JSN-SR04T-2.0 ultrasonic range finder and everything works perfectly when I have the device connected to my computer USB or via a 12V battery into the onboard ...
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1answer
96 views

Why doesn't pin 19 work when powering the EzSBC Esp32 board from batteries?

I recently got an ESP32-01 Breakout and Development Board from EzSBC.com. It is advertised as a board specifically designed for use with batteries because of it's low current draw when in sleep. As ...
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7answers
4k views

Does a delay in a loop save energy?

I've noticed most example snippets always have a delay in the loop even if it's not needed for proper execution of the program. I can only assume this is added because people copy and paste without ...
0
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1answer
131 views

Are my stepper motors being burnt out? What is the issue here?

I am building a mini-cnc laser engraver as shown in this intructable and this youtube video. I have built the circuit (minus the jst connector and two male pins at the top left of the board) and have ...
0
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1answer
25 views

Powering Arduino and L293D with the same Power Supply

I am relatively new to Arduino and plan to power an Arduino and an L293D Motor Driver with the same 9V power supply as in the diagram below. I tried to simulate this with Tinkercad, but it seems like ...
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1answer
82 views

How to supply more than 500mA while powered by USB

I'm about to build myself a new BrewPi and I have some Arduino power/USB questions. Something smiliar to a combination of these projects: https://imgur.com/a/Nval6 https://www.homebrewtalk.com/...
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5answers
12k views

Can I have backup power for an Arduino device?

I have an arduino project that will work while plugged into a generic outlet. But I want to connect a battery in case the power goes out. I know there are various power sources (coin cell, polymer ...
0
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1answer
325 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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1answer
52 views

Powering a system using batteries

I made an arduino nano IR sensor based auto liquid dispenser. Currently it is being powered by a 12V 2 amps adapter. The 12v adapter is connected to a LM2596 DC to DC buck converter which converts the ...
0
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2answers
194 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
33 views

Power up Arduino using AC/DC Adapter

Wanna get your advice regarding powering up Arduino Uno using AC/DC Adapter to the barrel jack. The first adapter I use couldn't work and the shop which I bought it from said the adapter was short ...
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0answers
23 views

Arduino sleep mode problem while sending data with gsm module

i am trying to send gps data via sim800l gsm module. Working fine without the power down code but when i add the power down code it stops working (not sending the gps data. code execution stops in ...
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2answers
56 views

Power Arduino and LED strip

I saw this question about powering Arduino and LED strip. So, I searched for a 5v 4a power supply and foud this one. How does that adapter provide power for both Arduino and LED strip? I thought I ...
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2answers
446 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
345 views

What pins to use to externally power an Arduino Fio (without battery)

I need to power an enclosed Arduino Fio project with 12V. The intention is not to attach a battery because there is no need as this is a fixed installation with a 12V DC available (for a pair of ...
0
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1answer
140 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 ...
0
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1answer
47 views

Circuit not working with 9 volt battery [duplicate]

I have made a simple circuit having an IR receiver and a Servo motor. Here is the diagram: Red wire: power Black wire: ground Orange wire: digital signal And here's the code: #include <Servo.h> ...
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3answers
292 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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0answers
43 views

Warm Atmega328p and weird power behaviour

I recently built a circuit with an atmega328p (which I have never used before standalone) and attached all the neccessary components (crystal, capacitors etc). However, when I powered it up with a ...
0
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2answers
54 views

How to keep track of millis during sleep mode

In my application, I need to keep track of the time the application has been running as well as use sleep modes. However, when using the sleep modes, Timer0 is disabled, and therefore millis stop ...
0
votes
1answer
46 views

How to power Arduino pro mini and DFPlayer mini togather with 3.7 V LiPo battery?

I made a small box containing Arduino Pro Mini , DFPlayer Mini player and a 3.7V LiPo battery. Is it possible to power two devices with 3.7 V Battery? What is the best way to save power for longer ...
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1answer
34 views

How to power 6 servo motors using battery to create a robotic arm?

I am trying to create a robotic arm. The problem is that I could not run all 6 servo motors -3 MG966r servo motors and 3 MG90S servo motors - simultaneously, using 12V and 3A AC to DC adaptor. Last ...
0
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1answer
34 views

Motor cutting out when using HC-05 Bluetooth module

I'm using an L293D motor driver chip along with an HC-05 Bluetooth module. The two work as expected separately - I can send a string via a Bluetooth terminal app on my phone to the HC-05 and I see it ...
0
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1answer
126 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 ...
0
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1answer
40 views

Understanding the variation of Arduino's current consumption with respect to the voltage supply

Even though this is already a well-debated topic, I couldn't find an extensive discussion about what really is drawing so much power in Arduino's board. Here is the preamble: I have an Arduino Mega ...
1
vote
1answer
45 views

NodeMCU Power supply

I got a question about externally powering my NodeMCU V3. It has an onboard voltage regulator (3v3) which breaks out to 3 header pins. Now I want to power 3v3 from an external board. Can I supply 3v3 ...
0
votes
1answer
39 views

What current is safe for Wemos d1?

I've got 12V / 400mA power supply for my Wemos D1 R1, and I'm using VIN output(I need 12V for led strip). I need to change this power supply because of color, and I can't find similiar with the same ...
0
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2answers
43 views

Arduino Uno SD card storage

I am interested in storing accelerometer data to an SD card. Since power consumption is the main consideration of my project, it is important to do as few writes to the SD as possible, because the SD ...
0
votes
1answer
44 views

Having trouble with motor shield running off external power source

I apologize if I don't immediately give important info, I'm very new to arduino's/circuity of any kind. I'll try to include as much info as possible. Some preface: I'm currently working on a project ...
0
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0answers
28 views

NodeMCU Power Draw and charging Circuitry

I am planning to build a small wireless keyboard, around 5 buttons and 1 rotary encoder, that will connect via WiFi to my Spotify account. For this project, I was looking at the Node MCU for the board....
0
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0answers
22 views

Feather will not work if GPS is attached

I have a feather huzzah, and a feather GPS shield. The feather will not accept program code while the GPS is plugged in. I have determined this is some sort of power issue. I have a battery connected ...
0
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1answer
28 views

Vin pin vs USB vs Barrel connector: Wemos D1 R2

@Majenko says in the leading (19 Upvote) answer here not to use VIN and USB socket at the same time. You must never ever connect VIN to a power source and connect the USB socket. That can destroy ...
2
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1answer
5k views

Power save Sleep Mode Arduino

I'm trying to use this example link source: #include <avr/sleep.h> /* Sleep Demo Serial * ----------------- * Example code to demonstrate the sleep functions in an Arduino. * * use a ...
1
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2answers
2k views

Arduino nano getting powered through analog input?

I noticed something today. I am powering the Arduino Nano from a battery and a 5v step up converter. That works just fine and I'm getting a stable 5v output. I have a second cable coming out from the ...
0
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2answers
47 views

Arduino Turn Signals

Could I use an Arduino to power run the following lights? Here I have a project in mind, and although I am new to electronics, I am a computer programmer (C, C++, C#, Java) by profession so the coding ...
0
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1answer
64 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 ...
0
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1answer
32 views

Inductive spikes upset Interrupts

I am using an Arduino Uno to create a kinetic sculpture with magnets and electromagnets (EMs). I have a setup with two externally debounced buttons using resistors,capacitor and CMOS 4584 hex inverter....
0
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1answer
3k views

ESP8266 light sleep - can't wake up

I am attempting to implement a light sleep mode on an esp8266 (feather huzzah) which, when a button is pressed, wakes the system up so that it can continue its normal task. I cobbled together some ...
-1
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2answers
681 views

WS2812B LED Stripe going crazy with Arduino and External Power Supply

I have a simple connection here: A WS2812B 5m 300 leds strip 5V; A Power Supply MS-150-5 150W 5V; Arduino with a simple code to blink 10 first leds; TEST: If I connect my power supply to my LED ...

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