Questions tagged [power]

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

113 questions with no upvoted or accepted answers
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37 views

PCA9685 - Hardware problem with diode?

I'm working on a project, where I need to run several high-torque servos. For that I bought come of these PCA9685 boards. I hooked everything up with my arduino and connected an external 5V - max 3A ...
3
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0answers
782 views

TRIAC Pulse driver for Spot Welder (help needed with programming)

I have designed and built a transformer driver board for my spot welder. It is powered from mains electricity (230 V) and consists of the following segments: triac drive and protection, zero cross ...
3
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0answers
78 views

Correctly Powering Lilypad Arduino

I am trying to correctly power a Lilypad Arduino that is attached with an HC-05, Lilypad temp sensor, and Amped pulse sensor. So far I have found that powering by plugging the Lilypad into my laptop ...
3
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0answers
198 views

Atmel SAM MCU (on Arduino Due) only boots after second power up

I am using an Arduino Due as a prototyping board for a microcontroller project. The due has the chip Atmel ATSAM3X8E, with an ARM Cortex-M3 core. I am programming the flash directly using Atmel Studio ...
3
votes
2answers
567 views

Bluetooth Communication Not Working with DC Power But Works With USB Power?

I am running a HM-10 Bluetooth Low Energy (BLE) module to transmit serial data (using SoftwareSerial) from an analog sensor onboard my Arduino Uno to a serial terminal app on my Android phone. When I ...
2
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0answers
45 views

Arduino compatible ESP32 and ESP8266 board power consumption at sleep state

I have data on smaller modules with ESP32 and ESP8266, but can't find anything reliable pertaining to the whole board power consumption (current) with 12V input and microcontroller at low power or ...
2
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0answers
52 views

Low Power, SD Card module and SCK

in order to minimise power consumption in a project using the Arduino Nano, I need to set pin D13 to HIGH after using it as SCK for transferring data to an SD card module (I use the SD.h module. I ...
2
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0answers
91 views

Help needed with driving multiple stepper motors on arduino UNO

I am brand new to Arduino but have good experience with Raspberry Pi's and Microchips. My problem is that I am having trouble driving many stepper motors at once. I am using the AccelStepper library(...
2
votes
1answer
84 views

How to separate a specific frequency signal from a summation of a few signals?

I want to calculate THD. SO how do I isolate the fundamental frequency from a signal with harmonics? I have a signal V which is a sum of V1, V2 and V3. V1=A1sin(w1t+phi1), V2=A2sin(w2t+phi2) and V3=...
2
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2answers
694 views

Connect 5V relay to ESP32 WROVER B board

I need to use a ESP32 WROVER B based MCU board with a standard (cheap) one-channel 5V relay (e.g. to switch on a mains-power appliance). Attempted removal of excess solder around the headers ...
2
votes
0answers
43 views

Low power USB C power supply

I am searching for a tiny board to that accepts an usb-c cable and outputs 5v. To my understanding, for the few hundred milliamps two 5k1 resistors on the board would suffice. PD is not needed. I ...
2
votes
1answer
195 views

Set control register to low in ds3231 rtc

I have been using ds3231 rtc module for keep tracking and make alarm along with backup battery. when I used it for first time it worked fine. but now it doesn't keep track my time when the power lose ...
2
votes
1answer
320 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 ...
2
votes
2answers
889 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 ...
2
votes
0answers
87 views

Turning on controller with button and turning off with a timeout

I am making a device controlled by an ESP 8266 and am wanting to save power by having it power down when not in use. The desired behavior is for a momentary button press or vibration sensor activation ...
2
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0answers
1k views

LED strip with 12v power connected to ESP32

I'm looking at controlling a ws2811 strip and I have seen mention that you should share the same ground between the strip and the controller, which does make sense. I do not currently have a proper ...
2
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0answers
39 views

Arduino Uno with data logging shield has a problem switching power sources

I have the basic Adafruit "Light & Temperature data logger Tutorial kit" made, and it works well when connected to a PC, but when I unplug the PC USB connection and hook it up to another power ...
2
votes
0answers
57 views

Solenoid flyback, relayboard switch

I want to open a solenoid valve with an arduino, and have set up the following circuit The plan is to add solenoids to every relay on the board. I am wondering if this circuit is any useful, or if ...
2
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0answers
384 views

Arduino Fails to Read Thermocouple on External Power

I'm having what I believe to be a power issue with an Arduino project. I've tried 3 different power supplies (all separately): My computer via USB B A 5V USB "outlet" via USB B A 5V USB "outlet", ...
2
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0answers
62 views

Different behavior when Arduino Micro powered by laptop USB vs portable charger USB

I'm working on a project that uses an LM35 temperature sensor to control a few LEDs. Above 97 degrees, one LED should switch on. Below 95 degrees, it should switch off and the other should switch on. ...
2
votes
0answers
59 views

LEDs interfering with analog sound detection

My project is a sound reactive LED display on an Arduino Nano. There are 112 WS2811s in series connected to 5v, Gnd and D5 via 220ohm resistor. I have a Keyes style sound detection module that has an ...
2
votes
0answers
171 views

Arduino Due, program not there after power off

When i program my arduino Due after a RESET, my program is still there. However, when i power off my Due and then turn it back on, no program is there! There is no persistence in the program and i ...
2
votes
0answers
353 views

which Arduino UNO ethernet shield supports power over ethernet?

I ordered for this ethernet shield for my UNO as shown on the amazon website listing I was thinking to add power over ethernet module to take advantage of shield that supports adding POE module. . ...
2
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0answers
199 views

ATMega328 not able to fully switch coreless motor on

I'm having trouble regarding motor control in a project I'm working on. It uses an ATMega328 DIP package on a PCB. The motors I'm using are small coreless motors and I'm trying to control them using ...
2
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0answers
146 views

Arduino code not starting at beginning after poweroff

I created a few Arduino-XBee temperature sensor nodes that send data to another XBee node.js server. I'm running into a few issues trying to write a function to initiate a handshake and receive an ...
2
votes
0answers
99 views

How to get power for a nexus 7 while reading serial data from an arduino over usb?

Does anyone know how to simultaneously power a Nexus 7 tablet while simultaneously reading serial data from an arduino over USB? I have had quite some trouble with this and have attempted multiple ...
2
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0answers
2k views

Sim800L HTTP post request stop working after a while

I am desperate to get my SIM800L module (http://www.ebay.co.uk/itm/SIM800L-GPRS-GSM-Module-Board-Quadband-QUAD-BAND-Antenna-for-MCU-Arduino-/321992759287) sending POST requests for a long period of ...
2
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0answers
144 views

What is the Arduino Nano maximum wattage?

Hello, I am currently working on a DIY project and I would like to know the Maximum Wattage of a Arduino Nano with a ATmega328 processor. If anyone know what it is it would be a great help. Ricky
2
votes
0answers
105 views

Hot regulator 7.7V Vin @ 135mA

Sorry folks, I understand this question has been asked quite few times, but I wasn't able to find a definitive answer: my Mega 2560 R3 is powered by 7.7V from Vin, and runs at a steady 135mA (in ...
2
votes
0answers
484 views

Pro Mini 3.3v + Neopixel not working when disconnected from USB

I'm doing a project using an Arduino pro mini 3.3v and Adafruit's Neopixel. I've flashed an example (strand example) from the Adafruit Neopixel's library sketch into the Arduino using the FTDI Basic ...
2
votes
0answers
77 views

gpio input read 0, but voltage is 3V3

I'm using GPIO api and configure it as input pull down. It reads value 0. However, when I use power meter, and connect this gpio and ground, it shows 3.3V. Is it normal or maybe some other peripheral ...
2
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0answers
314 views

Arduino ProMini green led flashing and unable to reset

so I'm using a promini running on solar power. For some reason, after sometime it gets stuck with the green led flashing and only by cutting power can I reset the promini. Even the reset button doesnt ...
2
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0answers
2k views

Controlling multiple LED strips with arduino

I want to control several (undecided) cut strips of these led lights:here. I want to be able to turn the LEDs on and off from the arduino, but I know that the voltage is too high to work with with ...
2
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0answers
1k views

Driving stepper motors adafruit motor shield v2

I got an Arduino Uno Rev3 and Adafruits Motor Shield V2. I also got two RepRap stepper motors: Frame size 42 x 42mm - NEMA 17 1.8 degree step angle Length 47mm Holding torque 44 N.cm (4.4kg.cm, 62oz....
2
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0answers
117 views

Can I use the SVG headers on the SainSmart Uno to drive servos?

I am working with a Sainsmart Uno with SVG header pins. This header is really convenient for hooking a servo to directly, so I have two servos connected to it on D9 and D10 and a 9v battery supplying ...
2
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0answers
152 views

Olimexino (32u4): power down

I want to power down my Olimexino as much as possible and only wakeup on a pin-change interrupt. I removed the 3.3V/5V jumper (so the processor does not get power) and 3µA were displayed, so the ...
2
votes
1answer
200 views

Arduino due erase button and power switching

Last days I have been investigatin schematics of arduino due board. The purpose of proper understanding of schematics in crucial for me, beacuse I indend to build myself my own board with some minor ...
1
vote
0answers
21 views

Arduino UNO and PCA9685 - Problem with external power supply

I am totally desperate and hope you can help me. I've been building a project for a while where I have to control several servos. For this I bought some MG996R servos and a PCA9685 16-Channel Servo ...
1
vote
0answers
33 views

Arduino and PCA9685 - Suddenly stopped working

I'm using an Arduino Uno and a PCA9685 board to run 4 servos (of type MG996R). For that, I set up the following connections: SCL -> SCL SDA -> SDA Ground -> GT VCC -> 3.3V As the servos ...
1
vote
0answers
51 views

Servos "jump to fixed position" at startup when powered by external power supply only, but not by board

My question is about something that is happening ONLY when I use external power supply. When I use the power from the Arduino Mega directly, there is no problem. However, I need to use an external ...
1
vote
0answers
67 views

Power Arduino MKR GSM 1400 via VIN

I am working on a project with Arduino MKR 1400 GSM and I would like to power the arduino board using an external power source (https://www.reichelt.de/raspberry-pi-netzteil-5-1-v-3-0-a-usb-type-c-eu-...
1
vote
0answers
40 views

Arduino UPS without reset

I’m trying to figure out how to make arduino UPS (when the power goes down it should not reset the arduino). Or preferably buy something that will do that for me. I found this, but Im not sure of it ...
1
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0answers
69 views

USB and LM7805 both to power Arduino

I have high current usage For my circuit as you can see below (link): I like to power Arduino when it is not connected to PC by USB Connection, So I want to add one external power supply and connect ...
1
vote
0answers
53 views

How to use 5v and 12v addressable led strip together

Hi guys I’m new to this forum and also not much experience about led lights question already asked but didn’t get any detailed answer I want to know can I provide working data signal to 2 different 5v ...
1
vote
0answers
21 views

DC Motor Shuddering

I am testing my BTS7960 Module with my UNO for bi-directional rotation of DC Motor. I am using a small DC motor as a test (like the one here) and I am powering the UNO via USB cable. The problem is ...
1
vote
0answers
46 views

L298N Motor Driver not working

I am using a L298N motor driver to connect a motor with NodeMCU. But i did a few tests since a few tests while learning how to control it now when i connect it the motor doesn't even work. Then i ...
1
vote
0answers
167 views

Power down NRF24 to conserve battery life using MOSFET

I'm using a Pro-Micro to send messages using NRF24 module from a remote location, using batteries (later on, will be recharged using solar panel). To conserve power, Pro-Micro wakes up every 30 ...
1
vote
1answer
53 views

switching power sources

I have a small project I am working on that accepts power from either a 5v DC power source or a USB power source. Now, I know that both of the power sources are effectively 5v. I have measured the ...
1
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0answers
82 views

Sim800L not working

I have been trying to set up the SIM800L. The LED is not blinking... I am using the LM2596 to convert from 5V to 4.3V (I did try with 3.7 <= Vout <=4.3 V) to power the module. With a 5V/2A power ...
1
vote
1answer
40 views

Servos jitter when powered by power module

I need 48 sg90 servos to move to a specific position each minute. Now I am using two arduino mega boards to power everything through 6 bread boards but it seems I need more power because some servos ...