Questions tagged [power]

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

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1answer
17 views

Arduino ds3231to TM1638 problems,alarm clock project

Good morning, I am coding an alarm clock on arduino by using a DS3231 and a TM1638. The code works and the time updates in the serial monitor,although the time doesn't update on the tm1638. I'll ...
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1answer
32 views

Arduino Nano IoT Power Consumption

I am trying to reduce the power of my Arduino Nano IoT. I would like to run it using a battery over a longer time period. I thought this would be possible when putting it to sleep most of the time. ...
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0answers
55 views

Reading I2C data from SW6106 register

I am using the SW6106 powerbank IC as an I2C but no matter what I have tried I couldn't read something other than "FF". Datasheet for the IC. Timing diagram for reading data: Timing diagram for ...
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1answer
34 views

Determine if Arduino is rapidly pulsed on and off several times

Greetings fellow humans! I've set myself the task of ascertaining whether an Arduino has been rapidly power cycled to force it into a setup state, a feature common with many IoT devices. So I ...
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1answer
91 views

How to assign an interrupt to a button press with an ATtiny? (interrupt not fired with my code)

(Here is finally a solution). I'm using the following code on a ATtiny45 to assign an interrupt to a button press (pin #7, PB2, INT0). However the LED doesn't blink when the button is pressed, as if ...
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2answers
57 views

How to deep sleep ATtiny/ATmega (to run for years with batteries) but still detect a button press?

Question (TL;DR): what is the optimal method to deep sleep (to run an ATtiny45 or ATmega on batteries for 1+ year) but still be able to detect a button press? Is it possible to deep sleep until a ...
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1answer
91 views

Are my stepper motors being burnt out? What is the issue here?

I am building a mini-cnc laser engraver as shown in this intructable and this youtube video. I have built the circuit (minus the jst connector and two male pins at the top left of the board) and have ...
-1
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2answers
33 views

Can I use laptop USB port to power Nodemcu if every port used

I wonder if a laptop USB port is enough or I have to use an external power supply if the NodeMCU under heavy load. Here is my list of sensors and port used. 3.3V 3.3V D1 to D7 A0 GND Sensors: ...
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4answers
70 views

wake from powerDown to check sensor then put back to sleep

I am using an Arduino Pro Mini with various sensors. I am powering it with 2 3.7v 3400mA batteries which I recharge with a solar panel. I take a reading from the batteries and if the reading is ...
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1answer
31 views

Common button on two Arduinos and two computers

We have two computers giving two presentations that need to be triggered in sync. I know how to send the space button via Arduino, but I want to check it will be safe for the computers. If each ...
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2answers
170 views

12V but what Ampere?

So if my arduino will draw around 800mA @5V and the dc-dc buck converter around 266mA @5V plus solenoid 1.2A @12V, is it a good idea to get 12V 4A (48W) power supply? Since Filip Franik told me that ...
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3answers
64 views

Does a pulldown resistor use less battery power than a pullup resistor?

I am designing a circuit connected to a simple open-close sensor, like a switch. For ease of construction, the circuit with the sensor switch closes to ground, and uses a 1 MΩ pullup resistor to Vcc ...
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1answer
21 views

Arduino uno + 5 IR obstacle sensor

I have IR sensor with current draw 100ma i have to connect 5 of them is i can connect all 5 with arduino directly or i have to use external power suplly for them
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0answers
106 views

Arduino-Controlled LED Matrix issues

I am making a 20 x 15 LED matrix, and am having some super annoying problems. I was hoping you all could help me find some answers. It is very important to note that I am following BitLuni's video ...
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4answers
941 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 ...
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2answers
23 views

Push Button to Drive Power to Servo

I am currently doing a project for a class which uses a few other components such as an LCD, a servo, and such. I want to use a button which acts as a circuit breaker on the Vin of the servo in which ...
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0answers
76 views

STM32 (F103C8) could not wake up after sleep

#include <RTClock.h> #include <libmaple/pwr.h> #include <libmaple/scb.h> RTClock rtclock(RTCSEL_LSE); #define SCB_SCR_SLEEPDEEP 4 #define SCB_SCR_SLEEPONEXIT 2 #define ...
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1answer
34 views

Floating power supply for Arduino - Is it still connected to the USB ground?

I am trying to power my Arduino Mega 2560 from a benchtop power supply. I plan to essentially feed in a 9V supply directly on the Vin pin and connect the GND pin to the floating ground pin on the ...
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1answer
95 views

Feeding microcontroller and linear actuators (motors) with the same power supply

I have already made a diagram using a motor controller. I want to use only one power supply to feed arduino and motors. I want to use MDD10 dual motor driver. The details of the actuators each one is:...
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1answer
33 views

Can I power Raspberry Pi 3 via 3V3 and GND pin? [closed]

Can I power my Pi 3 using the 3v3 pin (pin 1) and GND pin (pin 6)? Also, if I want to protect the board from power surges can I just put a fuse between my power supply and the 3v3 pin? Thanks in ...
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1answer
19 views

Circuit with a tip120 works with a Led but, don't with a vibrator motor

I have 2 Arduino Nano's. One with RF transmitter and the other with an RF receiver of 433 MHz and both have two 3v vibration motors. I want one Arduino to send a string to the other Arduino to let him ...
0
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1answer
34 views

Running many devices on 5V pin. How to provide external power

I'm using my Arduino DUE 5V pin to power a lot of sensors and I'm worried about the drop in current. I'm powering the board using the USB port. Is this the correct way or is there a different way of ...
0
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1answer
82 views

Arduino Smoothing does not work as expected

I using the standard example of smoothing: /* Smoothing Reads repeatedly from an analog input, calculating a running average and printing it to the computer. Keeps ten readings in an array and ...
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0answers
30 views

HC-SRO4 always returns zero no matter what I do?

Wondering if it's the sensor or the code? can anyone help? I've used the code here /* HC-SR04 Ultrasonic Sensor with LCD dispaly HC-SR04 Ultrasonic Sensor VCC to Arduino 5V GND to Arduino GND ...
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1answer
142 views

Power supply affecting sensor readings ESP8266 and JSN-SR04T-2.0

I have an ESP8266 Wemos D1R2 Board with a JSN-SR04T-2.0 ultrasonic range finder and everything works perfectly when I have the device connected to my computer USB or via a 12V battery into the onboard ...
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1answer
2k views

ESP8266 light sleep - can't wake up

I am attempting to implement a light sleep mode on an esp8266 (feather huzzah) which, when a button is pressed, wakes the system up so that it can continue its normal task. I cobbled together some ...
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0answers
32 views

LowPower.idle isn't waiting

I am trying to have my Arduino wait in a low power idle state given by the LowPower library made by rocketscream on an Uno. However, when I try to have it wait for 8 seconds, it seems to not pause at ...
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2answers
432 views

WS2812B LED Stripe going crazy with Arduino and External Power Supply

I have a simple connection here: A WS2812B 5m 300 leds strip 5V; A Power Supply MS-150-5 150W 5V; Arduino with a simple code to blink 10 first leds; TEST: If I connect my power supply to my LED ...
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3answers
62 views

Powering SIM800L

With peak consumption at 2A, the SIM800L needs much more current than can be supplied by an Arduino or NodeMCU. What is the best strategy to power this module, considering that you have access to a ...
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3answers
68 views

Arduino Uno not working after Short-circuit

While wiring up my new Arduino Uno R3, I accidentally shorted the 5V pin and the GND pin (for less than a sec). It was powered by a 12V 500mAh power supply through the Arduino DC power jack. . The ON, ...
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3answers
133 views

Connecting arduino ground with battery powered remote control ground

I soldered a cable to the button of a remote control and I want to simulate that button press by setting the pin to input mode and back to output (LOW) again. For this to work I connected the ground ...
0
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1answer
110 views

Arduino Micro not providing regulated power

I have an arduino micro that works fine off USB. I need to power it from an external 12V power supply. When I connect the 12V supply to the adjacent VIN and GND pins, the arduino will not power up. ...
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2answers
237 views

Powering Arduino Uno and Ardumoto Motor Driver Shield

I need to power an Ardumoto Shield to drive two 12V DC motors. I was planning to connect a 12V battery to the Max 18V input on the Ardumoto and a 9V battery to the barrel jack input of the Arduino Uno....
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1answer
659 views

Powering Multiple Servos From One Battery- What is my circuit missing?

I'm working on a robotics project right now and my limited DIYer knowledge of electrical circuits is failing me. I need to power 7 Rage Standard Metal Gear Servos (RGRS104-16-6vm) and 4 RadioShack ...
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1answer
203 views

I'm getting NaN for readings on my DHT22 sensor when using 3v3 pin, but not 5v pin

I have a DHT22 temperature sensor and DS1302 RTC module connected to the 3v3 pins on an Arduino Nano. Both the sensor and the RTC module are rated to work on either 3.3V or 5V, but the recommendation ...
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1answer
27 views

Powering Moisture sensor via arduino pin

Can someone help me. I have this sensor I just connected it to the 3V pin of my arduino only I read online that its better to connect it to a Arduinopin for power so you can put it off when not ...
0
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1answer
101 views

Problem with powering ublox NEO-6M GPS module

Firstly, I'd like to mention that I'm a beginner. This is the first time I've worked with a GPS module. The serial monitor is completely empty when I upload the following code to my circuit: #...
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0answers
27 views

Possible race condition using ADXL345, external interrupts and sleep

Setup: I have an Adafruit ADXL345 attached to an Adafruit feather 32u4, via I2C lines and an interrupt line. Goal: The microcontroller should be in a sleep condition when acceleration values are ...
0
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1answer
96 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 ...
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2answers
2k views

I fried the AMS1117 voltage regulator on my Arduino Clone, is this the cause?

I had the 12V DC power jack plugged-in all the time, and "to make things more exciting" I also plugged-in the "data" USB whenever I had a new sketch to upload. Is this combination a big no-no, or is ...
0
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1answer
122 views

Switch controlled power saving esp8266

I'm trying to build a door sensor with the esp8266. I want it to be battery powered and use deepSleep for power saving. I'm going to use a normally closed reed switch between D0 (GPIO16) and RST. I ...
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2answers
604 views

Arduino and USB power, what to choose

I am a beginner at Arduino. I want to power the Arduino through the USB cable that is usually plugged in the USB of the laptop, but plugged in the wall instead of the laptop. Here are my questions: ...
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1answer
3k views

Motor shield power from Arduino pro mini 5v RAW Pin 150mAh cannot run servo

linked to my old question, Pro Mini 5v with Adafruit motor shield v1 power sharing problems I figured out and use one 7.2v battery (6 AA cells), and link it with RAW pin to Pro mini and join its 5v ...
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2answers
2k views

Using a pushbutton to power Arduino on and off

I need help adding a pushbutton to provide power to an Arduino to save power, as I am using a battery and the same button to power it off. This is the circuit I wish to implement. Thanks.
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1answer
383 views

Can I power a Wemos D1 R2 via the VIN and GND pins?

Can I power a Wemos D1 R2 via the VIN and GND pins? If so, at what voltage?
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1answer
275 views

Wemos mini pro switch power from servo with mosfet bs170

I got a servo connected to a wemos/arduino with a capacitor(470uf). Before I didn`t use a cap. Now with the cap the device use to much power while sleeping(capacitor on the servo). I want to switch ...
0
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1answer
61 views

Problems / doubts on battery-powered Arduino Nano WiFi weather station I built

I've almost finished my first Arduino project and I'm realizing I might have gone a bit over my head - I'm a web programmer, I have a very basic electronics knowledge and started tinkering with ...
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1answer
43 views

How to power and switch on / off multiple boards at the same time?

I have many nodes. Each node consists of an MPU9250 and ESP32. Each node functions independently. They don't interact with each other. How can I power all of them at the same time, and switch them ...
0
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1answer
31 views

Any reason to acquire more watts than really needed?

Basic question (again): I have a LED-strip that requires 5V, and each LED (150 in total) requires about 60 milliamps. Calculating everything, I need 3 of these LED-strips (450 LED in total). This in ...
16
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4answers
70k views

What is the maximum power consumption of the Arduino Nano 3.0?

What is the maximum power consumption (in mW) of the Arduino Nano 3.0, when it is running in its default state (at 16MHz, no LEDs removed) and powered by an external regulated 5V supply so it bypasses ...