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Questions tagged [battery]

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

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1answer
29 views

Help with coding Arduino Nano to run fan through slide switch at specific intervals

I’m trying to use Arduino Nano to run my 5 V PC fan, which, I know it sounds crazy, it’ll be mounted on a piece of Tupperware that’ll control the airflow through it via the fan. However I have no ...
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0answers
3 views

Servo arduino using eneloop [migrated]

Say if i use 5x eneloop AA batteries to run 6x MG996R servo, will it be good enough since im afraid for the motor if it will burn out. I already read the spec sheet what im afraid is the stall current
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3answers
35 views

Powering arduino with battery

I haven't tried so don't know if it works or not. So I got a 6v battery AA, is it possible to run my arduino uno which already got a code in it if I plug + pin to vin and - to GND? Without its USB?
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1answer
45 views

Serial communication stops when powered with batteries?

Circuit explanation- Arduino Uno connected to multiple sensors and to 16 x 2 LCD. Uno's TX pin to ESP-01 RX pin. Uno has been programmed to read values from sensors and display them on LCD along ...
-1
votes
2answers
64 views

Powering Uno with 9v battery makes it “freak out”

I encountered an odd problem with my Uno, it works completely fine through USB on the PC or when powered by a power bank, but as soon as I connect it on a 9v battery it just freaks out. I have a relay ...
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3answers
53 views

Arduino Uno with 6x 5V solenoids + 9V battery - Not enough power?

I have 6 5V solenoids connected to an Arduino Uno, each of them with a TIP120 transistor, diode and resistor. Exactly like https://core-electronics.com.au/tutorials/solenoid-control-with-arduino.html ...
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votes
1answer
58 views

Can a Lithium Polymer battery charging circuit on Arduino boards also charge Lithium Lion batteries? [closed]

I have a project that the form factor of 18650 batteries works well for. The board I'm using is a esp32 based board with built in battery charging: https://www.amazon.com/gp/product/B072HBW53G/ref=...
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1answer
53 views

NodeMCU ESP32s can't get Vin to work?

Trying to power the board with a 9V battery through VIN. As the documentation says, it can take input voltage of 6-12 Volts, but when I connect the 9V battery, all it does is power the board on and ...
1
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0answers
42 views

Measuring battery voltage [closed]

I am trying to use this way to measure my battery voltage at least approximately, but I am getting weird results. I am running breadboard atmega328p with internal 8 MHz and powering it from a LiPo ...
0
votes
1answer
42 views

Replace 6 pin on/off switch on Power Bank with 3pin or 2pin?

I'm looking to finish up my project in a box and i'm using a battery bank to power the Leonardo micro pro and other components. The bank has a little on/off which on it which has 6 pins underneath. ...
-1
votes
2answers
51 views

How to calculate battery usage of my arduino project? [closed]

I want to measure power consumption and calculate the mAH value to know how much time would my battery can run the circuit. I only got a multimeter and DC power supply.(Im not sure if this is enough ...
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votes
2answers
28 views

Error compiling a sketch to class/library conversion

I'm trying to take a sketch and turn it into a class for a library I'm making, but I'm getting compile issues. This is not a duplicate as suggested. as i explain in the comment and my answer. Thank ...
0
votes
1answer
50 views

Trying to power multiple servos at once using a Arduino Mega

Recently I have been trying to do a project for my end of year project, it involved making a humanoid arm. I am still a newbie at these things, I usually have my friend do the wiring, but since he ...
0
votes
2answers
221 views

How do I choose a battery to power my Arduino Nano project?

I was wondering if anyone would be willing to teach me how to logically choose/calculate which battery I should/can use to power my Arduino nano project (so I don't have to keep it connected to my ...
3
votes
1answer
417 views

Why does using ESP8266 in deep sleep mode still drain the battery quickly?

I've made a "weather station" using the ESP8622. To save battery I'm using sleep mode but still the battery is drained after a couple of days. According to this post it should last at least a year. I ...
1
vote
1answer
61 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 ...
1
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2answers
51 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? ...
1
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1answer
45 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-...
0
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3answers
91 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"...
0
votes
1answer
70 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 ...
0
votes
1answer
250 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 ...
0
votes
1answer
148 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
82 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. ...
0
votes
1answer
55 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 ...
-2
votes
1answer
92 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&...
1
vote
0answers
45 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 ...
1
vote
2answers
73 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 ...
0
votes
1answer
181 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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votes
3answers
76 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 ...
0
votes
1answer
63 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 ...
1
vote
1answer
706 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
137 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 ...
0
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1answer
447 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
531 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 ...
1
vote
1answer
134 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
46 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 ...
1
vote
2answers
121 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
630 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 ...
0
votes
1answer
170 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 ...
1
vote
1answer
127 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 ...
2
votes
1answer
813 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 ...
1
vote
2answers
310 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?
1
vote
1answer
392 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 ...
0
votes
1answer
78 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 ...
0
votes
1answer
354 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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votes
1answer
146 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 ...
0
votes
1answer
911 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 ...
0
votes
1answer
23 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 ...
0
votes
3answers
105 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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votes
1answer
266 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?