Questions tagged [power]

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

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24 views

How to calculating requirements of power supply for a project

I am starting with electronics and been working with Arduino for some time now. I did some basic LED and servo motor project and was hoping to jump into making an obstacle-avoidance car. I used 4 AA ...
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0answers
28 views

Powering up small motor board without motor [closed]

Looking to supply power to the middle rings of this board on the back. It takes 3v to power it up. I’ve tried soldering but it’s for a motor so I’m not sure if it can stay permanently. Is there any ...
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1answer
39 views

Grounding Arduino UNO with external voltage source

I was experimenting with external power supplies and noticed that the only way the Arduino can communicate with an externally powered sensor (through SPI) is when the GND pin under power AND the GND ...
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0answers
18 views

I have three load cells can I sum all the three into Arduino to be one output? If yes how?

I am doing stand thrust and I have three load cells to measure the force. I would like to know if I can sum them to gather into the Arduino or I should use a junction box.
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1answer
26 views

Can you power the ESP8266E-12 with any of the 3.3V pins?

If I want to operate the NodeMCU on the 3.3V input with 2.5V to 3.6V; can I use any of the 3.3V pins to do so?
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20 views

Issue with different ways of powering

I have a project to make where I have to read tags out of 5 RFID Readers and when every tag is in correct reader to open a relay. The schematic is the same with Annaane's with the difference I have 5 ...
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1answer
26 views

Arduino MKR GSM 1400: Can I tell from code if the power has tripped

Is there a way to tell if an Arduino MKR GSM 1400 has lost power and has to rely on the connected battery? Ideally, I'd like to do this without adding additional circuitry. Alternatively, can I ...
3
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1answer
45 views

Arduino nano 33 ble vs ble sense. Power consumption, etc

After working with an Arduino Uno at work, I am looking to buy myself a board for some projects/experiments at home. The nano size seems like a great option, especially the one without soldered ...
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0answers
33 views

What component do I need (power)

I want to power my board using a 9v battery. I also want to power a component in my circuit from the same power source (9v battery) but ONLY when my board sends a signal (say from D1 pin). What ...
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0answers
15 views

What's the pinout of the Gravity MOSFET power controller board?

I found https://wiki.dfrobot.com/Gravity__MOSFET_Power_Controller_SKU__DFR0457 this board for a non-Arduino project and it does not list the pinout of the JST-PH 2.0 header but it does show it ...
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1answer
67 views

How do powering arduino both barrel jack and lipo battery together?

I have arduino mega and Lipo batterry such this and Lipo battery charger 5V USB Boost. I am powering arduino normally from barrel Jack with an 9 Volt adaptor. But if there is power cut occur, I dont ...
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1answer
40 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
39 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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1answer
44 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 ...
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3answers
74 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
48 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
39 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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0answers
35 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
24 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
68 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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1answer
39 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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1answer
53 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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0answers
44 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 ...
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1answer
56 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
87 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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2answers
90 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 ...
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1answer
55 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 ...
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1answer
41 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 ...
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1answer
42 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 ...
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1answer
50 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 ...
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0answers
30 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....
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0answers
23 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 ...
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1answer
52 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 ...
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1answer
50 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 ...
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1answer
38 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....
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1answer
57 views

Is it possible to overload the digital pins for an Arduino?

I worked on an Arduino project for school that was a self-driving security robot that also acted as a smart home system. It was essentially a self-driving Roomba-like car that included several LED's(...
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1answer
50 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 ...
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1answer
98 views

Using RST pin as external power switch

I have Arduino Nano with powered over USB. I have the request for external (physical) slide switch acting as power on/off for Arduino even if USB is always connected. Looking at documentation and ...
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0answers
40 views

External vs arduino power supply for servo motors?

I recently created a project that involves the control of three SG90 servo motors. I started off by controlling this through the 5V output pin of the Arduino Uno, with the Arduino powered through the ...
0
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1answer
63 views

Problems running Arduino project off a 9V battery

I have been working on an Arduin Uno Rev2 project for a while now. I have been developing using my MacBook, downloading code through the USB jack running it, monitoring the serial output on my MacBook,...
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1answer
59 views

Rechargeable USB “AA” Batteries. Has anyone used them?

I have a cosplay project where I'm creating a "Megaman" aka Rockman type of arm cannon (it's actually based on DC's Cyborg). Anyhoo, I've been weighing options like using 3xAA alks or 4xAA nicd (or ...
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2answers
52 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 ...
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0answers
59 views

Saving Power :: Reducing Power Consumption

For Arduino Nano 33 IoT, I want to turn off everything except Bluetooth and Wireless since I don't use them. My question please: Can I switch off / deactivate the IMU sensors completely? If yes, How ...
2
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1answer
48 views

Servo motor troubles

The image is as clear as I can make it. Here are the basics of my problem. My program is meant to make 6 red LED lights in sequence fade in and out, toggle 5 white LED's on and off with a button, and ...
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2answers
68 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 ...
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2answers
67 views

Arduino “Phantom Powering”

I am using an Arduino Uno in my project. I recently found that if I disconnect the power from my Arduino (I am powering it by USB port, from a 5V regulator - 7805), then it remains under power from ...
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0answers
31 views

Motor driver shield l239D should be giving enough power but it doesn't

I am doing a line follower robot using motor driver shield l239D stacked with an Arduino uno to run 2 DC motors and two infrared sensors. I am supplying 12V to the motor driver shield trough three ...
0
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1answer
57 views

how do i know what battery(how much ampere and voltage) my circuit needs to work perfectly?

i really love to make a lot of things but i always have this problem that i don't know how can i determine what battery(with how much voltage and amp)my circuit must have to work perfectly! please ...
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1answer
42 views

Part identification [closed]

This may be a dumb question but i would like to know what this part is. Anyone who knows?
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2answers
179 views

sleep mode and watchdog at the same time

suppose a project with Arduino that we should save battery power, so we use sleep mode and also avoiding the Arduino of hanging and use watchdog timer. But the problem is here that when the Arduino ...

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