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Questions tagged [power]

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

0
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1answer
50 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 ...
1
vote
1answer
63 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
votes
1answer
78 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 ...
1
vote
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 ...
0
votes
0answers
13 views

Powering 2 servo motors [on hold]

I am new to electronics and can't figure out how to power 2 servos. I know that each one needs 5V and around 700mA. I guess I must use a 5V and 1.4 A power supply. Is that correct? What would ...
0
votes
2answers
992 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.
2
votes
1answer
42 views

From Exploring Arduino Text

I am working thru the Exploring Arduino text mostly with success up until chapter 4. I have most of the parts required but for Figure 4-3 I used the following: 100nF Capacitor, (In place of 1uF ...
6
votes
3answers
3k views

How to stop Arduino from drawing power through USB

I'm working on an embedded project, where I use arduinos as a "sensor shield" for RaspberryPi (I have model B). The problem is, that the RaspberryPi's USB port is not powerfull enough to drive WiFi ...
0
votes
1answer
203 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
votes
2answers
43 views

How can I discard power from a device I want to read from?

I want to read the data line from a device that normally interfaces with a controller. It has 3 pins, 3.3v power, gnd, and data. I don't need the power line since the Arduino will be USB powered and I ...
0
votes
1answer
16 views

H Bridge for microcontroller power management?

Is it fine to use L298 N Dual H Bridge Stepper Motor Driver Module to control power of other ICs in a multiple microcontroller setup? I intend to reduce power consumption in by powering communication ...
2
votes
4answers
2k views

Cannot power up Arduino Uno + Ethernet Shield with other than computer USB

I have successfully wrote a sketch for Ethernet Shield and Arduino. If I plug it into computer's USB, it works. But if I plug into any other power source, like USB power adapter from iPhone or ...
-1
votes
1answer
36 views

Power external daughter board from Arduino only powered by USB?

Been searching for an answer, but I see lots of talk about it, but not clear answers. Can somebody clarify this? If I power the Arduino only via USB, can I put a small daughter board? and power it ...
5
votes
5answers
3k views

Does a delay in a loop save energy?

I've noticed most example snippets always have a delay in the loop even if it's not needed for proper execution of the program. I can only assume this is added because people copy and paste without ...
0
votes
1answer
35 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 ...
2
votes
5answers
2k views

Why is Arduino resetting while driving motors?

I am driving motors for my line-follower project . The circuit schematic is given below The power source is a 11.1V 2200mAh 25C Lipo . Practically the cells give 11.5-12V. I used a switching buck ...
0
votes
1answer
221 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 ...
1
vote
3answers
53 views

Arduino Uno with 6x 5V solenoids + 9V battery - Not enough power?

I have 6 5V solenoids connected to an Arduino Uno, each of them with a TIP120 transistor, diode and resistor. Exactly like https://core-electronics.com.au/tutorials/solenoid-control-with-arduino.html ...
0
votes
1answer
25 views

Powering an Arduino directly from a motor driver (DRV8825) or external power source?

Hello people from StackExchange, I'm new to Arduino and driving stepper motors in general; please excuse me for my limited knowledge on the subject. I've been doing research for a few hours already, ...
1
vote
1answer
3k views

Deep sleep mode for the Uno without complicated circuits?

so I'm building something using an Uno that will run on batteries - so, I've watched a couple of these low power tutorials to lessen the energy consumption so the batteries can last longer, but they'...
0
votes
0answers
25 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 ...
1
vote
1answer
27 views

How do I supply either (1) dual voltage or (2) negative voltage? [closed]

Sorry in advance if this question already exists--I tried to search but my keyword knowledge is shaky. I have created a Colpitts oscillator on breadboard using AA batteries as the power supplies. I ...
0
votes
1answer
53 views

NodeMCU ESP32s can't get Vin to work?

Trying to power the board with a 9V battery through VIN. As the documentation says, it can take input voltage of 6-12 Volts, but when I connect the 9V battery, all it does is power the board on and ...
0
votes
2answers
36 views

Will a 12 VDC 1A Power Supply Adapter supply too much power and damage an Arduino Mega 2560?

The specs shown here: show that it has 54 digital pins with each outputting a DC current of 20mA which makes it 54 * 20 = 1080 mA Plus the DC current of the 3.3V Pin of 30mA we get a total of 1110mA....
0
votes
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
3
votes
3answers
26k views

Powering up LED strip - How many amps?

I want my Arduino to drive a LED strip. The LED strip in particular is the 3528 non-waterproof type. To power this up, I need a 12V power supply. My LED strip is going to be 5 meters. Now my ...
0
votes
1answer
37 views

Will this buck converter power my arduino? [closed]

I'm thinking of using something like this: https://www.amazon.ca/Dolity-Converter-Isolated-Switching-Transformer/dp/B07CSZ1174?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duc12-20&linkCode=xm2&...
1
vote
1answer
35 views

Can you use an Arduino to control the output current and voltage of a DC/DC converter?

I am using an arduino to create a device that outputs a specific current and voltage. I was wondering if there are any devices out there such as dc/dc buck boost converters that can be controlled by ...
-1
votes
2answers
68 views

let Arduino limit it's own input power

My current project will be sitting next to a 12VDC power line. It seems a waste no to tap it to power into the Arduino board too. Now I read everywhere that with 12V input quite a lot power gets ...
1
vote
0answers
27 views

3 phase 3 wire/3 phase 4 wire [closed]

I am looking for a circuit where I would be able to use a common circuit for 3 phase 3 wire and 3 phase 4 wire. Is there any conversion IC available? I have attached image for reference used in some ...
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 ...
0
votes
1answer
47 views

How to properly run 4 DC motors with an Arduino?

I am working on a project where I have 4 DC motors that is controlled by 2 L293D motor drivers. 2 of the motors act as the wheels of the robot, and the other 2 act as a mop. The Arduino board is ...
0
votes
2answers
127 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
votes
2answers
44 views

Powering L298N drivers from mains power supply [closed]

I am powering 2 stepper motors with an L298N driver each (from a 9V 2A external power supply powered from the mains: https://www.amazon.co.uk/BERLS-Power-Adapter-Elegoo-Connectors/dp/B07GSM6YLX/ref=...
1
vote
1answer
45 views

How to subtract the current analog value from previous one [closed]

I pretty new to the Arduino. I am working on project that find the power by reading your
0
votes
3answers
66 views

Arduino max power supply limit

What is the maximum current that can be supplied to an Arduino Mega board before frying/breaking? Basically i have several components connected to my board which draw a total current of 1.6A (which i ...
0
votes
0answers
40 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
1answer
57 views

Using Sleep AND LowPower.h

I am trying to set up the low power module for an instance case, I have installed the low power library but when I am using the line LowPower.powerDown (SlEEP_5S, ADC_OFF, BOD_OFF) ; It is ...
0
votes
1answer
42 views

Replace 6 pin on/off switch on Power Bank with 3pin or 2pin?

I'm looking to finish up my project in a box and i'm using a battery bank to power the Leonardo micro pro and other components. The bank has a little on/off which on it which has 6 pins underneath. ...
1
vote
1answer
87 views

Powering a Tiny Arduino Project

I'm trying to build a tiny project. After I program the board, to power the dev board - how can I power it to run the code? Question: I was curious as to how I would be able to power the ATtiny85 ...
-2
votes
2answers
94 views

Recommendations for 24V to 5V AC/DC converter [closed]

I'm working on an ESP8266 thermostat that should be powered by the 24V AC from the furnace. I'm looking for a converter to 5V DC that would be small enough to fit in a smaller enclosure and not ...
2
votes
1answer
41 views

Mega 2560 pin output power and control question

I am trying to determine the total pin power requirements for my Mega 2560 project; it will connect to 3 1m Neopixel strips and 5 RGB laser fiberoptic lights, and control them via PWM. Each strip and ...
2
votes
0answers
106 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 ...
0
votes
1answer
58 views

Arduino Power project question?

I saw a project on the Internet (the one in the photo), and I wonder, would it be a problem for me to connect the Vin and GND of the Arduino to the same place where the Servo Motors are being powered? ...
-1
votes
1answer
100 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?
-2
votes
2answers
297 views

Understanding how to power objects with a relay (featherwing, feather huzzah)

I am trying to learn how to control a relay to power various household objects. I bought a power relay shield for an adafruit feather huzzah, and I have just set up the arduino blink sketch to provide ...
0
votes
2answers
61 views

Arduino Micro draws too much power from iPhone. How can I change that?

I'm building a USB keyboard that has two buttons - space and enter. The plan is to use this USB keyboard (with an Apple Lightning connector to USB) with the built in iOS switch control. I bought the ...
0
votes
3answers
850 views

Power a Raspberry Pi 3 from an Arduino Uno

I would like to power my Raspberry Pi 3B using an Arduino Uno. I have been able to do this by connecting the 5v on the Arduino to the 5 V on the Pi and connecting the GND to GND, and the Pi ...
0
votes
1answer
25 views

How to drive N channel gate correctly from Adafruit Feather pinout?

I am learning how to create a soft latch power switch, using an N channel mosfet. Currently, I have this: simulate this circuit – Schematic created using CircuitLab The idea is (so far) that ...