Questions tagged [power]
This tag is for questions regarding powering and/or power consumption of Arduino systems.
110
questions with no upvoted or accepted answers
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answers
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Can I use regular pins (Example: D2, A3, etc...) as serial (RX, TX)?
Python/Arduino Beginner here...
I have a DFplayer I am trying to hook to my Arduino and I want to hook it up through the regular pins instead of the RX and TX pins, but I've not been able to find ...
- 41
3
votes
0
answers
514
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 ...
- 161
3
votes
0
answers
1k
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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 ...
- 31
3
votes
0
answers
91
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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 ...
- 31
3
votes
2
answers
702
views
Bluetooth communication not working with DC power but works with USB power?
I am running an 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 ...
- 151
3
votes
0
answers
207
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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 ...
GrixM
2
votes
0
answers
42
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Confusing language on arduino docs about powering via 3V3/5V pins
I'm reading about powering alternatives for the arduino board, and I have run across two confusing sentences in Section 5, powering via 3V3/5V pin. First, it says:
3V3 and 5V pins can also be used as ...
- 121
2
votes
0
answers
95
views
WiFiNINA Reseting Arduino Nano IoT 33 When Powered Externally
This is puzzling me: if I power my Arduino IoT 33 Board from USB, everything runs smoothly. Now, if I power it with 5V on Vin, the board resets as soon as I call WiFiNINA's WiFi.begin(ssid, pass).
Of ...
- 121
2
votes
0
answers
117
views
ESP8266-01S only coming back from DeepSleep every 2nd time
I'm using an ESP8266-01S for a battery-powered project. The ESP is in DeepSleep, a doorbell relay pulls RST to GND, bringing the ESP to life to do some stuff, before going back to DeepSleep.
My ...
- 151
2
votes
0
answers
127
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Power requirements of a 7 Segment Display on Uno vs Nano
As part of a Simhub Dash set up I have been trying to get a 8 Digit 7 segment display working on an Arduino Nano. As part of my fault finding process I have gone back to basics and am using the ...
- 121
2
votes
0
answers
60
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 ...
- 209
2
votes
0
answers
260
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 ...
- 49
2
votes
0
answers
808
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(...
- 163
2
votes
0
answers
51
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 ...
- 41
2
votes
0
answers
124
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 ...
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2
votes
0
answers
2k
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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 ...
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2
votes
0
answers
47
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 ...
- 21
2
votes
0
answers
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 ...
- 21
2
votes
0
answers
460
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", ...
- 21
2
votes
0
answers
68
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. ...
- 21
2
votes
0
answers
66
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 ...
- 193
2
votes
0
answers
187
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 ...
- 1,405
2
votes
0
answers
374
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.
.
...
- 575
2
votes
0
answers
216
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 ...
- 66
2
votes
0
answers
166
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 ...
- 131
2
votes
0
answers
105
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 ...
- 21
2
votes
0
answers
3k
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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
votes
0
answers
263
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
- 21
2
votes
0
answers
110
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 ...
- 121
2
votes
0
answers
492
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 ...
- 41
2
votes
0
answers
84
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 ...
- 21
2
votes
0
answers
365
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 ...
- 125
2
votes
0
answers
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 ...
- 21
2
votes
0
answers
1k
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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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2
votes
0
answers
130
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 ...
- 121
2
votes
0
answers
160
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 ...
- 566
2
votes
1
answer
545
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 ...
- 121
2
votes
1
answer
316
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 ...
- 21
1
vote
1
answer
106
views
RS485 message edit on the fly between EV charger and energy meter
I am trying to connect Feyree smart EV charger with Dynamic Load Balancing to DTSU666 smart meter via RS485.
Dynamic Load Balancing is a function of EV charger that lets you dynamically change charger ...
- 21
1
vote
2
answers
116
views
I'm planning on using 2 arduino boards for my project. Should I use 2 voltage regulators for project or use 1 for both?
For context, my first board would contain a motor circuit with an L298N motor driver while my second contains a controlled heating system that uses 2 relays with PTC heating elements, DHT11 sensor, ...
- 21
1
vote
0
answers
82
views
Running a 5V, 4pin pwm fan with Mega2560
I have a Mega2560 and would like to use it to power a single fan and display. The fan is a 5V fan that draws 260mA and I can't find power specs for this display. I can't find a clear answer for how ...
- 111
1
vote
0
answers
310
views
Arduino Nano 33 BLE power consumption optimization
I am working on building a sensor using Arduino Nano 33 BLE that will measure temperature using two thermistors and angle changes. The measured values will be transmitted over Bluetooth to a ...
1
vote
0
answers
169
views
How to lower the power consumption of this ESP32 during delay(500)?
The following code works. It does the following:
wake up when pin GPIO0 is connected to GND (the pulse duration is 400 milliseconds)
once every 10 wakings, I send the current index to a server with ...
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1
vote
0
answers
92
views
Arduino port not discovered with bootloader / Did I fry my board?
I have a Arduino Nano 33 BLE that I've been using for a while. I usually upload new programs to the board through USB with the board in a bootloader loop. The other day this stopped working. The board ...
- 111
1
vote
0
answers
614
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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
...
- 161
1
vote
0
answers
312
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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 ...
- 11
1
vote
0
answers
355
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 ...
- 119
1
vote
0
answers
395
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-...
- 31
1
vote
0
answers
99
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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 ...
- 315
1
vote
0
answers
478
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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 ...
- 201