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Questions tagged [power]

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

2
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0answers
99 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 ...
2
votes
0answers
159 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 ...
2
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0answers
990 views

Power servo with external power using a hacked USB cable

I want to use a servo motor and control it by an Arduino Duemilanove (or a Leonardo). It seems to work fine when I connect it directly to Arduino's VCC, GND and an PWM pin. But I am a bit worried if ...
1
vote
0answers
16 views

Having trouble with motor shield running off external power source

I apologize if I don't immediately give important info, I'm very new to arduino's/circuity of any kind. I'll try to include as much info as possible. Some preface: I'm currently working on a project ...
1
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0answers
167 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 ...
1
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0answers
27 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 ...
1
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0answers
32 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 ...
1
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0answers
42 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 ...
1
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0answers
179 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", ...
1
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0answers
48 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. ...
1
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0answers
37 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 ...
1
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0answers
154 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 ...
1
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0answers
285 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. . ...
1
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0answers
156 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 ...
1
vote
0answers
110 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 ...
1
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0answers
84 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 ...
1
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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 ...
1
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0answers
306 views

What pins to use to externally power an Arduino Fio (without battery)

I need to power an enclosed Arduino Fio project with 12V. The intention is not to attach a battery because there is no need as this is a fixed installation with a 12V DC available (for a pair of ...
1
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0answers
118 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
1
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0answers
85 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 ...
1
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0answers
442 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 ...
1
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0answers
69 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 ...
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0answers
224 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 ...
1
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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 ...
1
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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....
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0answers
96 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 ...
1
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0answers
127 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 ...
1
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0answers
120 views

Arduino Firmata Disconnecting Randomly

I am currently using an Arduino Mega 2560 with a Windows 8 laptop. On the Arduino I have uploaded the StandardFirmata code with only one modification. The samplingInterval was changed from 19 to 99 ...
1
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0answers
418 views

Why can't I use Jeelib Sleepy on the Teensy 2 along with Serial

I have been using the Jeelib Sleepy functionality for several years now to achieve low power states on the Arduino ATmega328/1280/2560 boards, specifically the LoseSomeTime functionality. I want to ...
0
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0answers
6 views

How to filter the power supply for an Arduino in a vehicle (car, motorcycle)?

I want to use an Arduino (maybe Nano, maybe MEGA) in my motorcycle (a new KTM with lots of electronics). I checked my test circuit (with the MEGA) and it uses about 100mA (with 5V connected to the 5V ...
0
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0answers
24 views

Arduino Due Atmel IC heats up

When i tried powering the board the Atmel IC heats up and led goes of after a second .the board does not get detected on my IDE software . 1) I have tried out finding the issues with the board and ...
0
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0answers
18 views

Arduino powering to control sensors

I would like to know if it's possible to power up arduino by VIN pin (say 9v) and use 5v output pin to connect to a sensor. Many thanks
0
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0answers
39 views

Is successively toggling power on and off bad for microcontrollers

Does successively turning power on and off damage an Arduino or Adafruit Audio FX Sound Board in long or short term? I build a "fairy phone" out of an old rotary phone, an Arduino Pro Mini 3v3/8Mhz, ...
0
votes
0answers
16 views

Will this power supply work with a MG-996R Servo?

I'm trying to power a tower MG-996R servo with this universal AC power adapter for an arduino uno project. The adapter can output: 3V/4.5V/5V/6V/7.5V/9V/12V.Output current:1.2A, also has a USB port:5V ...
0
votes
0answers
18 views

Teensy 2.0 “device descriptor failed” with I²C sck+sda cable connected

I'm currently making a split keyboard, using a Teensy 2.0. I decided to make my two halves communicate over I²C, connected through a 4-cable audio cable. For that I got the following jacks: I used ...
0
votes
0answers
30 views

Differing behaviour from Arduino Nano when plugged into laptop vs power source

Well here's a weird one. I'm monitoring a mic on an analog pin of an Arduino Nano and using the variation in voltage to control and LED. When plugged in to my Laptop (USB 3, 500ma available, the ...
0
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0answers
92 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
0answers
277 views

Trying to use NodeMCU ESP-12e, a 5v relay AND a solenoid lock on same 12v power wall-wart

Noob here, so be gentle. Using a 12v-5/3.3v power board, NodeMCU powers relay fine, 100% of the time. Add in the solenoid by soldering a line from the wall wart into the COM spot on the relay, and ...
0
votes
0answers
98 views

Arduino shuts off randomly (Temperature?)

I've got an Arduino Uno running in a case, with a Fona 808 shield from Adafruit on top. It's used as a location tracker; it'll get the current GPS location three times a second, then send the average ...
0
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0answers
2k views

WEMOS D1 MINI NodeMCU, how to correctly powering it?

I'm developing a simple project using a WEMOS D1 MINI NodeMCU to drive an rgb LED strip so I managed to use a 12V power source to drive the current to the 12V pin of the led strip, a STEP DOWN ...
0
votes
0answers
259 views

Serial communication between two microcontrollers w/ separate power supplies

Fair warning: I'm an electronics n00b. I'm trying to get an Arduino Uno R3 to send data over 9600 baud serial to a Wemos D1 Mini Pro. What worked (mostly): Powering (5V) Arduino off a 4 AA barrel ...
0
votes
0answers
489 views

Power supplied by WeMos D1 R2

I've tried to measure power supply from a WeMos D1 R2 to devices connected to it (sensors, relays, servos) but could not reach a limit where the microcontroller stops working in order to know its ...
0
votes
0answers
641 views

Using a 12V DC adapter to power Arduino nano, 12v Solenoid and an Hygrometer

First of all I am very novice in electronics so bare with me. I am trying to make a self watering system using arduino nano, first I tried the fly fish hygrometer module with the 5V power of the ...
0
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0answers
87 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 ...
0
votes
0answers
282 views

Arduino external 5V power supply

I'm designing a shield for the Arduino Uno with some sensors that require +5V, +3V3 and +3V Vdd. I want to power everything with a single DC adapter so I have a voltage regulator that converts the DC ...
0
votes
0answers
601 views

cannot get low power with Adafruit Trinket

I want to get as low power use during sleep as possible with an Adafruit Trinket. Based on results presented on various places in the internet (blogs etc), I expect to be able to go down to 50 - 100 ...
0
votes
0answers
113 views

Nano clone failure, how to prevent it from happening again?

I'd made an LED driver, and fed both the LEDs and nano clone from 12V. The 12V switched power supply is of dubious quality. The nano itself read a pot, and wrote PWM values on three pins. It has run ...
0
votes
0answers
25 views

How do I use this motor shield?

I am stuck with this motor shield. All I have is the shield. No documentation available online, nothing. I need to run two motors off this thing and I only have a few hours to figure out how this ...
0
votes
0answers
68 views

Voltage via 9V adapter and MIDI

I want (eventually) to power my Arduino using MIDI inputs/output with a 9V adapter like this: adapter MIDI also offer power but this seems quite unreliable (like 3V, 5V or uncertain, or none at all ...
0
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0answers
109 views

Connecting a sensor to the 5V pin shorts Arduino Nano

I bought an ultrasonic distance sensor seen here: http://arduinobasics.blogspot.co.uk/2012/11/arduinobasics-hc-sr04-ultrasonic-sensor.html?m=1. As per the wiring diagram I connect it to the ground and ...