Questions tagged [battery]

In electricity, a battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.

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51 views

AlphaBot, which type of 18650

The AlphaBot uses batteries 18650. But does anyone know if it should be the ones with the button top or the flat top? Heres a button top: https://www.amazon.com/AllForBest-Protected-Panasonic-18650-...
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22 views

How to make more efficient reading of GPIO

My (python) program (on Raspberry Pi zero W) turns on/off a GPIO pin (connected to a relay module) depending on the RSSI signal of my phone (connected via bluetooth) and the status of one more GPIO ...
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32 views

How to correctly implement voltage and current monitoring from a solar panel?

Good day Given: Solar panel (with a maximum output current of 2100 mA and an output power of 25 W; Output voltage - 5 V). These parameters are stated on the seller’s website and may differ from ...
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65 views

Rpi GPIO Push Button Circuit Grounding Problem

I have a little project where I power my Raspberry Pi Zero using a 12v Battery, via a small 12v to 5v regulator I bought from eBay. I am going to connect a push button to the Pi as in the following ...
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107 views

how do I automatically power off the raspberry pi and cut power every night and then power it back on each day?

Background I'm a student working on research project to develop a remote wireless sensor network of data loggers. Each data logger (aka node) is going to be retrofitted to a bird feeder that reads ...
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70 views

Can I use Rpi 3.3V power pin (pin number 1, not GPIO signal pin) to power a 5mW green laser pointer originally powered by AAA x 2 = 3V bateries?

Let's say I have a device powered by 2 AAA batteries in series (1,5v x 2 = 3v and 625 mAh). Is it possible to replace the 2xAAA battery with the 3,3v Raspberry PI GPIO output? Or the 0,3v may be an ...
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1answer
49 views

Does a battery pack exists which does not need the microUsb power connection? [closed]

I'm building a small robotic car, which obviously needs battery power for it and the RPi. I've no problem with the battery pack for the car since it fits neatly into the chassis, but the RPi microUsb ...
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47 views

RaspberryPi is not provided with enough power

Im trying to learn robotics with raspberrypi but im having a problem. I have 6 AA batteries that are connected to a LM2596S adjustable voltage regulator module, Which then is connected to the ...
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37 views

Are there any battery backup options that work with a PoE powered Pi?

Looking to have a Pi (4) that is powered over PoE - are there any battery backup options (i.e. hats) that can be stacked with the PoE hat & supply power if/when the PoE fails (and then re-charge ...
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85 views

Battery Usage Pi Zero W for video stream

I am trying to do live video streaming from the rasberry pi, meaning the camera is recording a video and then transmitting the live video over wifi. What is the smallest battery I can use to power ...
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1answer
34 views

Most recommended power-supply option from dual-port Powerbank

I have a Raspberry Pi 3 model B [1]. It's powered by a DC adapter that outputs 5.1V and 2.5A. Although I consider ocassional manual reboots, I'm planning to use a Powerbank as some kind of UPS, after ...
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39 views

How to connect components of an RC (and rPi) car to the battery safely?

I am building an RC car from scratch. I have a 6v motor with an appropriate mdb, a 5v hobby servo, a raspberry pi zero w, and an 2200mAh 11.1v 50 C battery. I will upgrade the motor to a higher ...
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134 views

Raspberry Pi UPS with LiPo Battery

I have been working on a battery back up for my raspberry. The idea is classic: connect power bank to wall outlet and raspberry to power bank output. It works well with only battery power. But when ...
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1answer
47 views

LiPo Voltage Drops

I am experiencing voltage drops with the following setup and I hope someone with mad electronics skills can explain my mistake to me: Raspberry Pi 3 Model B TFP401 Display Driver 7.0 Inch TFT Display ...
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2answers
2k views

Car Powered Raspberry Pi: Safe Shutdown and Power On

Apologies if this is a duplicate, but I can't seem to find a suitable solution. I need to power a Raspberry Pi in a car, and for obvious reasons need to shutdown gracefully, however, I need it to ...
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1answer
56 views

Raspberry PI Portable USB Charger [duplicate]

I bought a $5 usb charger that I am using to power my Raspberry Pi. The charger works decently but I am noticing that every once in while the raspberry pi will reboot. I have read that some chargers ...
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154 views

How best to power a motor hat asking for 6-12V for just two DC motors

I purchased a Waveshare Motor Hat because it has the nice Pi Zero size, extra long headers, and already has headers and blocks soldered, all for less than $13. https://www.waveshare.com/motor-driver-...
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85 views

Power Raspberry Pi using GPIO Pins and a 10A supply with 7805

I am currently working on a project where i have micro-controller,stepper drivers etc all powered through a single 12v 10a power supply. I was planning to use the same supply to power the raspberry pi ...
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380 views

Powering Raspberry Pi and Arduino

I'm curious about powering Arduino Uno, Raspberry pi 3 b+ and motor driver L298n. I've got 11.1V / 2200 maH li-po battery. Firstly connected battery to motor driver, then feeded arduino from 5V out ...
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459 views

Car battery life with raspberry pi 3 model B

=> Raspberry pi 3 model B powered with car battery I have two questions : 1- How can I calculate car battery life ? 2- Is their negative impact for the start-up of the vehicle when I use his ...
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1answer
70 views

Running Raspberry pi 3b+ on lithium ion 36wh/7.4v question

I have built a little medical assistive device using the raspberry pi 3, I wanted to attach it to a backpack and test it in real life situations. I don't have much money to purchase much things but I ...
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336 views

Is it safe to use this battery with the Raspberry Pi Zero?

I have two questions actually: 1) is it safe to use this battery and these wires with the raspberry pi zero? 2) if yes, where do i solder the highlighted (red square) ends to the zero board?
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100 views

How to implement properly the iot garbage management using sensors and esp8266 to mobile application

My question: I don't know how to connect ULTRASONIC SENSOR(hc-sr04) which is for getting the fill level of garbage and DHT11 for temperature and humidity to connect both in a ESP8266 to mobile ...
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62 views

How to extend battery life on custom pi laptop

So I'm trying to make a pi laptop based on this project with a few differences: I use this display instead of this Technically, I'm using 18650 cells, but at a slightly reduced capacity No Arduinos ...
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2answers
366 views

Raspberry Pi DC Motor Not Working

So, I am attempting to control a DC motor using a RPi Model 2B. I am using a l293d motor driver to try to control the motor and a 4 AA battery holder. The diagram is supposed to look like this ...
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618 views

L298N Not working with 4 x AA Batteries

I have a 6V motor attached to a HiLetgo Module L298N Dual H Bridge and controlled via two Raspberry Pi 3B GPIO pins (current just using HIGH & LOW). If I use a 5V power supply from my Raspberry ...
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1answer
245 views

Slim distro for media server with least battery consumption [closed]

I want to create a portable media server using Raspberry Pi Zero W running on LiPo battery. Steps will include installing minidlna, dhcp server, hostapd. I have fair knowledge of these things and can ...
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2answers
65 views

Determine with a circuit whether the Raspberry is off

I am building a RC car with a Raspberry Pi 3, and I would like to power the Raspberry with a battery. However, when the Raspberry is off, I would like to switch from the battery powering the Raspberry,...
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1answer
62 views

Is it safe to wear a Raspberry Pi with a battery module? [closed]

I want to take a Raspberry Pi with me as wearable device so I have to attach a battery on it. The problem is that I fear the battery would explode some day thus destroy my body , just like Galaxy ...
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1answer
64 views

Which is the most energy efficient language to develop an apllication for Raspberry Pi?

I have a Raspberry Pi that runs under a power bank (battery) of 10.000 mAh. I want to develop and application which does non-blocking IO from the USB port and sends data over network to accumulation ...
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472 views

Sense HAT - Power Consumption

What is the average power consumption of the official Sense HAT (w/o LEDs)? More specifically: I'm interested in the power consumption when logging the data from the gyroscope, accelerometer and ...
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1answer
403 views

Battery level monitoring circuits [duplicate]

I want to use a USB power bank for powering my RPi3B but I need to display how much charge is left. What is a good set up of measuring the battery level of the power bank?
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1answer
1k views

Battery level of USB power bank [duplicate]

I plan to use a USB power bank to power my Raspberry Pi 3 Model B, but I need to know the battery level/percentage. There is the battery icon and percentage in the top right corner. Does this ...
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287 views

Using Raspberry Pi Zero W connected to LM7805 or dc buck converter from UPS LEAD acid battery

Planning to build battery backup for raspberry pi zero w that last for days from 12v lead acid PC ups battery. Parts PC UPS, https://www.youtube.com/watch?v=-Ur-D37-juo LM7805, https://www.ebay.in/...
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97 views

Powering Motor Driver from the Pi?

Im looking into getting the L9110S Motor Driver. I need to control 4 motors between 4.5v and 6v. The issue I am running into is how the motor driver is powered. It looks like most people power it ...
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1answer
194 views

Am I Correctly Calculating mAh for the Pi?

I am trying to figure out what size battery I will need to power my RPi and 2 components with it. I want to build a "tablet" of sorts, mainly because I don't want to spend $800 on a Wacom tablet when ...
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224 views

Using Raspberry Pi with Powerbank Accumulator

I wanted to power my Raspberry Pi 3B plus some sensors and an additional Huawei modem with a Powerbank. When turned on that's no problem, everything works fine. But I want to measure some enviromental ...
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1answer
35 views

Is it correct to say that we have few cm computers but we still need a bulky transformer? [closed]

In a past I planned an arduino project, on the microcontroller side. With the possibility to go idle and save batteries. But arduino is not a computer. The reduced size of things like raspberry pi ...
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1answer
63 views

Looking to piggyback a pi on top of an arduino robot. How to power it?

I recently bought and assembled this Arduino-based robot turtle kit, and it's fun but I find microcontroller code a bit limiting, and I'd like to stick a raspberry pi on top of it to provide some ...
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2answers
430 views

battery management

I designed a food dispenser using a rPi+touchscreen, a h-bridge L293DN and a Mercury stepper motor SM-42BYGO11 (from Sparkfun). The system works great except that I need to have it powered by a ...
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1answer
178 views

Trouble using Pi's GPIO pin PWM to control ESC powered by separate battery

Can I use my Raspberry Pi to provide the PWM controlling my ESC, but have the ESC powered by a separate battery? The ESC I'm using is "A1S 3A Blheli 1S Super Mini Brushless ESC". It's awesome. And it ...
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37 views

2 Raspberry Pis 1 Battery

I'm working on a project, here's the deal... I have 2 raspberry pis (3B, and a zero w) and 1 battery (3.7V LiIon 1200mAh). I bought a PowerBoost 1000 (A "DC/DC boost converter module can be powered by ...
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2answers
643 views

Running/charging batteries on the RPi3

I have a standalone RPi3 inside a case where I've designed room for a couple servos and a battery pack of some kind. The mini USB port is accessible thru the case wall, and I could also make the 4 ...
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2answers
968 views

Power Raspberry Pi using two 3.7v Lipo batteries

I was having trouble while booting up my Raspberry Pi powered by LiPo batteries. Ignore the components inside the blue circle I am just connecting the batteries, the darlington transistor and the ...
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1answer
124 views

Why does my Pi 3 Model B with HAT DAC run fine on a 4V Lithium battery?

Everything I have read about the Raspberry Pi 3, model B says that it will not run reliably on anything below 4.6vdc. I have a Pi 3 and I am running it at around 4V DC with a single 18650 lithium ...
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45 views

Choose a boot partition based on rtc contents

We ship units which have an expected life in the field of ten to twenty years. They include an RTC with a replaceable coin cell. Most of the time the machines will be powered on, so the RTC battery is ...
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178 views

Raspberry Pi Backup Battery Hat V1.2 battery level

My question is about Raspberry Pi Backup Battery Hat V1.2 specification. Is it possible to see somehow level of battery discharging (% of battery charge) by using the operation linux system like ...
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3answers
119 views

Will my Pi running on a battery be damaged as the battery dies?

So I know that providing a Pi with too little power can potentially cause physical damage to the circuitry (brownout). I don't 100% understand how or why this happens. I know that it seems a lot of ...
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4answers
3k views

Smallest battery that can run the raspberry pi zero w for a short amount of time

I have a raspberry pi zero w. What is the smallest (in terms of weight) that can run the pi? I am not concerned about how long it runs for; 5 mins would be adequate. What about with a camera attached? ...
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2answers
220 views

Lipo battery hat or attachment which supports seamless USB recharging

I just want to add UPS functionality to some of my flock of raspberry pis, and with an emphasis on portability. One of the ways to get this is with certain USB battery banks. I have one here that is ...