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Questions tagged [battery]

A battery is an electrical power source which is often portable.

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32 views

Arduino Uno powered by 9v battery gives ticking noises (Otto Robot)

I built an Otto robot based on an Arduino Nano board and powered it with a 9 V block battery and everything worked as intended. I'm currently recreating the project with a group of kids, but we only ...
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1answer
53 views

Creation of multiple power cells to be controlled by Arduino [closed]

I'm fairly new to the Arduino world, but have a history of good working knowledge of computers and software (I'm a software engineer), but I've only had the opportunity so far to create a few simple ...
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2answers
32 views

What is 1.8 to 5.5 VDC?

I'd like to buy a standalone capacitive touch sensor to create interactive art. It says it is powered by 1.8 to 5.5 VDC. I am new to arduinos - what type of battery can I buy to power this sensor? ...
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0answers
17 views

Spider bot not working : Motor jitter and power consumptions

So I am working on making a spiderbot, however after assembling the entire design I have realised that the servos jitter too much and the connections keep getting lose as I am using jumper wires and a ...
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1answer
41 views

Can batteries be damaged? [closed]

I have some questions when it comes to draining batteries with low power projects. I have been making a few low power projects with Arduino Pro Minis running on batteries. Some run on single non-...
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0answers
48 views

Using Attiny85 with rechargeable Li-Po battery pack?

I have an attiny that I would like to integrate into a project. I was originally going to use the Adafruit Trinket, but the attiny is enough for my task. I would like to be able to recharge the ...
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0answers
28 views

Correct Thermistor readings on battery-powered Arduino Pro Mini?

How to read proper value of thermistor on battery-powered Arduino Pro Mini 8Mhz/3.3V? Do I need some "reference" voltage? The value changes when voltage changes, like: battery voltage drop ...
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0answers
43 views

What battery to use for Attiny85 and 433 Mhz transmitter

I am building a simple remote control using an Attiny85 and a 433 MHz RF transmitter. I know that the Attiny85 can work at voltages from 2.7-5.5 V, so I thought I can use something like a CR2032 ...
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3answers
46 views

backup battery for FeatherWing DS3231, RTC

I am working with slightly modified example code for the Adafruit FeatherWing DS3231 RTC (real time clock) board. The DS3231 chip itself is from Maxim. Since the cell is described as a "backup battery"...
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1answer
66 views

IoT gabage monitoring system with my own Android application [closed]

I'm developing a device system in our campus - my aim is to provide three IoT smart garbage containers that will get the fill level (to determine the space of garbage inside and to inform the garbage ...
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1answer
77 views

Arduino YUN Rev. 2 power supply

I want to connect my YUN Rev. 2 to 7.4V. I read that the older version only provides exactly 5 V at the Vin Pin. Is the Rev. 2 similar to it? I read that the power supply should be improved, but what ...
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1answer
39 views

How can I calculate remaining battery life time with arduino [closed]

I want to display a 3.7V battery's remaining life time on LCD screen using arduino. Like a laptop does. 1h 23m remaining or others. Do I need any kind of module to measure the thing? Can anyone tell ...
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2answers
42 views

Choosing a proper power source for for basic RC car with 4 motors [closed]

Help me to choose a power source for the below project: 4x DC Motors (3V~6V DC each with ~170mA), 1x Micro Servo Motor (4.8V~6V), 1x Ultrasonic sensor 1x Bluetooth sensor It is basically an RC car. ...
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1answer
50 views

Are any Arduino boards especially suited for low-power operation?

The Arduino project has done an excellent job in providing a portable software interface to a number of different hardware systems. Are there any Arduino-compatible systems which are especially ...
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1answer
44 views

How to power an arduino nano [closed]

I am trying to power an Arduino nano connected to an LCD screen. I want it to work without connecting it to a computer. Please let me know if the connections aren't clear in the photos. I have a 5&...
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0answers
33 views

How can I power MKR1000 and 25 NeoPixels 24hrs or longer?

I have an arduino MKR1000 which I would like to run off battery power for a few days with 1-3 dimly lit NeoPixels active. Every day for an hour there will be 10 NeoPixels active. Brightness for both ...
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2answers
57 views

How should you predict the battery size required for a project?

I am using an Arduino nano along with an ESP8266. The nano is connected to an OLED display and a keypad. The ESP8266 uploads the data entered from the keypad onto a server. I wish to make the device ...
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1answer
47 views

Can adjustable constant current/voltage source be made with Arduino?

I would like to create a 18650 battery automatic management system that can handle and restore used up cells using solar panels for power. To do that I need to create adjustable constant current ...
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3answers
38 views

nrf24l01 fried when supplying 6.5V to VIN?

I have two Arduino Unos (One clone, one genuine) and I'm trying to make a remote and a base station. Got everything working flawlessly, (Using RF24 library) and the last piece of the wiring was to get ...
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1answer
45 views

Power management circuit

i'd like to have a esp-01 powered on and controlled with a push button only. so imagine the device is off, the user press the momentary push button. in the setup the esp8266 turn on a mosfet or ...
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1answer
480 views

Read both battery voltage and analog sensor value with NodeMCU ESP8266

I have a soil sensor that reports value once every 5 minutes, deepsleep in between. Is there a way to also report battery voltage (with ESP.getVcc())? To get the battery voltage reading to work I ...
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0answers
101 views

Arduino Pro Mini stopped working / broken

I need help, currently I am working in final project about portable monitoring system. I am using Arduino Pro Mini 5V/16MHz as microcontroller and a Li-Po battery to power it up through XL6019 boost ...
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1answer
207 views

Will Nodemcu support 4AAA

Will Nodemcu support 4AAA batteries which is 6v approx, or should i go with 3AAA batteries which is 4.5V approx. And one more question , is it ok to use AA instead of AAA ?
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1answer
256 views

Running a HC-SR501 PIR Sensor constantly using battery

I am not sure if this is the correct forum since I tend to use the ESP8266 standalone and not together with the arduino nano. However, here is what I am planning. I have a HC-SR501 PIR sensor, which ...
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1answer
73 views

LiPo + charge/boost circuit vs pre-built “power bank” - contrasting portable power sources [closed]

Portable 5V power for my projects - I was about to get the necessary parts to wire up an OEM LiPo battery (3.7V battery, boost circuit, charging circuit) when I took a peak at pre-built "power banks". ...
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0answers
45 views

Turn off battery charging and use battery to run arduino

I have a project that is configurable, so it is sleeping most of the time but in specified intervals wakes up, do some measurements and turn on a small water pump for a few seconds. My aim is to ...
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2answers
67 views

How to use a DC buck converter to regulate Uno R3 input voltage?

I have had a rough time trying to understand why this isn't working correctly. Quick background: I set up a system to pop open car doors using touch sensors. I heard that powering the Arduino Uno R3 ...
2
votes
1answer
410 views

Use external power - nodemcu 0.9

I'd like to deploy my project so I'm looking for a way to power the nodemcu. I'd like to know if there's a way to power it with a 9V battery without any other external circuit. Until now I've found ...
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1answer
94 views

Most compact way to power 5V Arduino boards?

So I have quite a few ideas for wearable devices using Arduino boards (mainly the Nano and the Micro clones). With that in mind, I want to determine what the best way to power an Arduino is, with ...
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1answer
92 views

Powering an Arduino Uno using 2 (or as few as possible) AAA batteries

[Background] I'm constructing a water bottle rocket which is going to use apogee detection and a mechanism for the parachute release. Connected to the Uno will be an accelerometer and a servo, now ...
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1answer
314 views

Two batteries sharing ground?

I need to power my arduino and 2 DC motors requiring 6V each, I want to power the DC motors with a 6V battery through the vM pin on an h-bridge and use a 9V battery to power the Arduino itself. On my ...
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2answers
146 views

Motor does not move with 4 batteries [closed]

I mada a 4wd car with ultrasonic sensors and servo. I use 4 AA 1.5 volt batteries for power. But the motor does not move. What is the problem?
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1answer
241 views

Can't power HC-05(5v) with Arduino Pro mini (3.3v)?

I am trying to use HC-05 (5V) with Arduino Pro Mini (3.3v) but I have had little success. I am using a coin cell to power the pro mini which powers it on and is working fine. But, my HC-05 doesn't ...
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1answer
55 views

Switch controlled power saving esp8266

I'm trying to build a door sensor with the esp8266. I want it to be battery powered and use deepSleep for power saving. I'm going to use a normally closed reed switch between D0 (GPIO16) and RST. I ...
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1answer
219 views

How to externally power HC-05 module with Arduino Pro Mini?

guys, I am new to arduino. I am trying to power my HC-05 (5v with regulator to 3.3v) from Arduino Pro Mini 3.3v but I can't get it to power on. There is a problem: The site I bought HC-05 from says ...
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1answer
98 views

Building an EEZYBOTARM MK1

My bot arm building is complete, I'm using it with Arduino and 2 joysticks with 4 servos ( mg90s), running with the 9v battery, but still, the servos could not lift the bot arm once it is going down ...
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1answer
585 views

What is a safe way to power arduino nano with 7.4V Lipo battery?

I'm trying to power Arduino Nano with 7.4V LiPo battery and use it to run 2 DC motor using L293D. I have figured out how power it with the connection just like in the figure below(the diagram uses Uno ...
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1answer
19 views

Pro Mini atmega168 voltage woes

I have a fistful of Pro Mini clones with atmega168 ICs. Oddly they have 16MHz crystals. When I feed it nominal 3.7V (really 4V, but it will spend most time around 3.7) via the RAW pin, I see 2.6V on ...
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3answers
98 views

Connecting arduino ground with battery powered remote control ground

I soldered a cable to the button of a remote control and I want to simulate that button press by setting the pin to input mode and back to output (LOW) again. For this to work I connected the ground ...
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1answer
215 views

Power Arduino Due and 6 servo motor with Battery [closed]

I would like to create a project contains 6 servo motors and Arduino Due board, but I have no idea how to operate should I use only a 9V battery only or in addition to 4 AAA battery?
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2answers
363 views

Measuring Lithium ion cell voltage used to power Arduino via a boost module

Can I measure lithium ion cell voltage with Arduino ADC which is used to power the same Arduino through a boost module (XL6009)? The output voltage of boost module is 9 volts.
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0answers
61 views

Spurious temp readings with DHT11

I have a very simple circuit and program to read the temperature and humidity from a DHT11 sensor and an Arduino Nano. When connected to the PC all works as expected but when I switch to a battery (...
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1answer
403 views

Vcc measurement with internal 1.1V reference fails on 3.3V powered Atmega328

Hello ! I need to monitor a battery plugged to an Atmega running on standalone mode. I use the "ATmega328 on a breadboard (8 MHz internal clock)" bootloader. More info here When the Atmega328 is ...
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1answer
536 views

Battery life with Nano v3

Easy secret knock detector to trigger anything with only an Arduino and a few cheap components First of all I need to state that I'm new to Arduino and electronics in general. My question is about a ...
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1answer
303 views

cheap long lasting options for battery?

I recently made a differential drive using Arduino UNO, two BO dual shaft 9v Motor and ld293d.To power Arduino, I am using a Hi-Watt 9 volt battery, to power the ld293d 5v pin (VCC1) I am using ...
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2answers
1k views

Arduino Nano and SIM800L on Battery Power

I'm very new to Arduino and everything related but I'm highly interested to learn more. However, I've run into a problem right in the beginning. I want to build some sort of portable emergency/...
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0answers
64 views

Feather MO: do I have enough power for my setup?

I am using the Feather MO Adalogger from Adafruit with the Ultimate GPS Feather hat to collect some GPS data: time stamp (millisec), speed (knots), and altitude (meters) for a model rocket. The GPS ...
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1answer
328 views

SparkFun ESP8266 find out when on battery power and when charging

For one of my projects I use the SparkFun ESP8266 board with an additional LiPo battery in cases power supply goes down. Now I would like to communicate the power loss - or the fact that the board is ...
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2answers
35 views

Does old/low charge battery affects internal clock?

Totally newbie in eletronics here, but could not find the answer for this one. When a battery is nearly-exhausted, it's voltage and or amperage dims, right? My question is if this kind of scenario (...
1
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1answer
44 views

Using Li-Poly battery to run UNO + Adafruit data logger

I want to power Arduino UNO+Adafruit data logger (https://www.adafruit.com/product/1141) with a 3.7V 2000mAh Li-Poly battery. I am providing an excitation voltage of 3V, through one of the digital ...