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Questions tagged [power]

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

0
votes
2answers
49 views

Wake up ESP8266 from deepSleep with a button

I have a button with two isolated tracks. I want to be able to wake up esp from deepSleep with this button, and also detect that it was clicked. So i can't connect it to reset, because esp won't work ...
0
votes
1answer
24 views

reduce power consumption for esp8266 in access point mode

esp8266 acting as a access point , question is how to reduce power consumption in this case? I don't think i can use sleep modes here in this case.
0
votes
0answers
16 views

Powering the adafruit motor shield externally

I have an adafruit motor shield v2.3 that needs to be powered externally without plugging it in the arduino UNO. For example, I program the shield with the UNO, plug it out and put it on a custom ...
0
votes
0answers
38 views

Ardunio Keypad Multiplier [closed]

I have an Arduino project which measures power and it has a price displayed. My problem is when I enter the per kilowatt value from the keypad in case 1, and when I go back to the case 1, the value is ...
0
votes
1answer
17 views

Interfacing 4 ESCs and an Arduino with a single LiPo battery

I have 4 BLDC motors, and 4 ESCs, one for each motor. But I have one LiPo battery from which I want to power one Arduino Mega and all the 4 ESCs. Can I remove the connectors from the ESCs and put them ...
0
votes
1answer
18 views

SIM808 return the same AT command

I am using atmega 2560 and SIM808. When I send an AT command to SIM808 it returns correctly. But sometimes I have seen that SIM808 returns the same AT command. Sometimes it occurs due to lack of power ...
0
votes
1answer
49 views

Battery voltage monitor right after deep sleep

i have my esp32 module in deep sleep and i use it with a couple of buttons using a wake up that detect the button pressed now i'd like to have a battery level to send to a server right before going ...
1
vote
1answer
26 views

Powering arduino and node mcu [closed]

I want to power up my Arduino and my Nodemcu via 12 V , 1 A power adapter (it's an AC to DC power Adapter). Recently I have two voltages regulators: a 5 V for nodemcu and 9 V for Arduino Uno. The ...
0
votes
1answer
35 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
0answers
18 views

USB OTG to arduino using another power source [duplicate]

First off: I know some similar questions have been asked, but I think my question has not been answered yet. I am working on a way to controll my LEDs via my Android phone, which works, by connecting ...
0
votes
2answers
39 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
62 views

Are these relays connected correctly?

I currently have limited electronics experience. I am planning to use mains power through relays for climate control, so considering the risk, I would like to check to see if these relays are ...
0
votes
1answer
29 views

Connecting 2 arduino on same ground

I'm working project which consist of 2 arduino running a 2 different sketch, However, can i make these 2 ic to run on same power +ve and same ground?
-3
votes
2answers
79 views

1-10 volt analog signal

I have an Arduino project where I am using an ESP8266 (Wemos D1 mini) powered via USB. I want/need to output an analog voltage from 0 to 10V. Goal: A solution that is pre-made (eg a shield or ...
0
votes
1answer
45 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 ...
0
votes
1answer
31 views

MAX232 chip fails to initialize properly with arduino

I have connected a MAX232 chip for RS232 communication with my Arduino. The chip input is connected to Arduino Tx and it is getting power from external 3.3 volt dc power source. My Arduino is also ...
5
votes
1answer
63 views

Converting a standard setup/loop sketch to a low power application?

Suppose I have a typical setup/loop style sketch, such as this one which turns on an LED when a button is pressed. How do I modify this so that it enters low power mode, awakes on the button press, ...
-1
votes
1answer
35 views

H bridge with transistors not enough power [closed]

I am making an autonomous car from an old RC car. For the steering I made my own H-bridge, consisting of 2 PNP and 2 NPN transistors. When I connect everything, the motor works fine. But it hasn't got ...
1
vote
1answer
42 views

Sending data over two independently powered arduinos

I have multiple arduinos that are each powered by a 12v battery through a 5v regulator. All arduinos share a common ground. Can I simply connect the digital output from one arduino into the digital ...
-2
votes
1answer
41 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&...
0
votes
2answers
44 views

Use 5V SD-Adapter on 3.3V System

I want to use a Catalex Micro SD Card Adapter in Combination with my Arduino MKR GSM 1400. The problem is, that the Arduino uses 3.3V to operate but the SD Adapter needs 5V (or at least 4.5V) to ...
0
votes
1answer
39 views

The need to use logic level converter

Why do we need level logic converter to have 5V or 3.3V? Because in Arduino Uno/Mega (don't know about other boards), they already provide 5V and 3.3V for us to use.
0
votes
1answer
343 views

Trying to power 100 Arduino's from single power line [closed]

I'm trying to power up to 100 Arduinos that will be spread across a 25m wall using a single power line. The idea is each Arduino will have a few a few buttons, leds & an oled screen and will all ...
1
vote
2answers
75 views

Connecting Arduino Arduino to MOSFET

I want to use my Arduino Nano to control a 12V peristaltic pump via a BDX33c N-Channel MOSFET. The pump has a maximum current draw of 1,4 A. The Arduino (via VIN) and the pump are powered by a 12V ...
0
votes
0answers
24 views

Need advice finish line sketch from Arduino to ATtiny85 and power consumption

I'm working on this sketch to work on ATtiny85. The hardware that I use is quite simple: 2 LED ( as output ) 2 IR receiver ( as input ) So I need 4 digital pins I/O to work and it should be work on ...
0
votes
1answer
34 views

Repair Arduino with too much voltage exposure

I have used the 5V pin instead of the Vcc pin to operate some sensors on the Arduino MKR GSM 1400. Altough the operating voltage is 3.3V.Because of that it doesn't work properly anymore, some analog ...
1
vote
2answers
51 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
38 views

Is SRAM erased when putting Arduino into sleep_mode_pwr_down?

Question In the interest of reducing power consumption, I am putting the Arduino into sleep mode between taking sensor readings. However, the data from readings are stored in arrays, and must not be ...
2
votes
1answer
40 views

How can I make a power button for my project powered by a USB powerbank? [closed]

I've solved the battery power supply issue for my Arduino project by simply connecting a USB powerbank. However, I just realised that I can't come up with a good way to add an on/off button! There ...
0
votes
0answers
39 views

Seemingly free floating and too high voltages

I have connected a moisture sensor, a usual LDR, a BH1750 and 4 DS18B20 sensors to my Adruino MKR GSM 1400. A few days ago everything worked fine when mounting it to a breadboard. But now for some ...
0
votes
0answers
33 views

Keep battery pack awake and run motor every 6 hrs

My circuit is a Nano that runs a watchdog timer code to keep it asleep and wake it every 6 hours to run a small dc motor for 5 minutes and then go back to sleep. The watchdog timer code works great ...
0
votes
1answer
36 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 ...
1
vote
1answer
39 views

Safely powering a relay from same source as attiny/arduino?

My project involves using ATTINY to control a 5v relay (specifically JZC-11F and will be ground triggered) in an automotive setting. I keep seeing the warnings of powering a relay from the same ...
0
votes
1answer
43 views

Help me determine the power consumption/rating of the circuit below? [closed]

Please help me determine the circuit's power consumption from the battery and help me outline the steps to calculate?
0
votes
1answer
42 views

Cannot use radio transmitter after switching to LowPower library

My Arduino Mini board has DHT22 temperature sensor and 433MHz radio transmitter modules. I'm using DHT and RCswitch libraries to make use of them. Code looks like this: void setup() { tempSwitch....
1
vote
2answers
46 views

How to produce multiple DC voltages for a single project

So the title pretty much says it all, but for an example, I have an arduino board, 5-12 V, an LED bank 18 V, and an ultrasonic mister 24 V. I know some brute force methods to power ...
1
vote
4answers
75 views

Turn off power to a moisture sensor except when reading values

I have an Arduino Uno and a moisture sensor (looks like a YL-69 clone) submerged in water. I need to read the sensor's (analog) value every 3 min or so. The problem is: the sensor is always powered by ...
0
votes
1answer
29 views

Use lowpower-libary and still use serial connection and other things

I managed to get the LowPower libary working on my Arduino Micro. This code works perfectly: #include <LowPower.h> void setup() { // initialize digital pin LED_BUILTIN as an output. ...
1
vote
1answer
65 views

DHT11 Sensor : Stand-by or Shut down?

I have an ATmega328P monitoring room temperature and humidity. It is enough for me to monitor every 8 seconds. In these 8 seconds, I am putting my Atmega to sleep. Now , I want to know : Does ...
0
votes
0answers
8 views

Arduino micro standby issues

I wanted to set my arduino to standby, by using the lowpower.h libary (https://github.com/rocketscream/Low-Power). Using this code to suspend it for 8 seconds: LowPower.powerDown(SLEEP_8S, ADC_OFF, ...
4
votes
4answers
98 views

Send out a short signal every 10 seconds to an arduino

In order to reduce power consumption, I want to resume my Arduino from standby mode every 10 seconds. For this a hardware interrupt is necessary. Is there such a device that can create a quick ...
0
votes
1answer
40 views

Accidentally shorted 5V to GND on Arduino Nano, can I reuse the ATmega328p?

I've shorted 5V to GND and the Arduino Nano (CH340 clone) stopped working (power LED light is dimming). The board had a burning smell, and I also checked if other Arduini on the same USB port worked ...
1
vote
2answers
51 views

Do I need to power off the Arduino board before doing something?

Is it safe to build a circuit while the Arduino board is powered? Should I power the board only when I have to upload the program?
0
votes
1answer
36 views

Do I need an external power supply for the SG90 micro servo?

I have a Uno R3 and although I can add an external power supply for the SG90 micro servo it would make the project more complicated. Can I power the servo using the 5v pin of the Uno R3? I measured ...
1
vote
1answer
53 views

Power RFID module using GPIO

I am building an ESP8266 device that uses RFID but need to conserve battery power. The ESP is a Wemos D1 Mini and the RFID module is a RC522 (still waiting for it to arrive), which needs 3.3 V. ...
0
votes
0answers
41 views

Is this a good way of making a low power attiny? Unpower instead of sleeping

I am making a low power rf remote that just has 3 buttons and sends rf signals accordingly. I've been trying to make pin interrupts work when it's in deep sleep but it's a huge hassle. And then I ...
0
votes
1answer
21 views

How to connect both MicroSD module and MPU9235 power in an arduino

I'm really new at electronics and wiring, so please be kind. Coding is my stuff, but I'm trying to learn something here. I'm working with a project to store the movements of a skateboard through a ...
0
votes
2answers
34 views

Schematic interpretation, where to put resister?

I'm new to schematics, trying to figure out where to put a resistor (no instructions other than the schematic) I'm told I need: 10K variable Resistor x 1, 4.7K Resistor x 1, 100 Resistor x 1 But I ...
-2
votes
2answers
71 views

Connecting Arduino to a Peltier Module [duplicate]

I am trying to make a cooler using Peltier Modules, the Peltier Modules and the fans switch on when the Temperature sensor attached to the circuit reads above a certain threshold. But I know that ...
0
votes
2answers
51 views

How can I power a servo and Arduino from the same power supply?

I have an ESP8266 NodeMCU which I'm using for an automatic blinds project. The NodeMCU struggles to power the servo on its own, so at the moment I am using a 5 V supply for the servo and a USB ...