Questions tagged [power]

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

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52 views

How to use a push button & transistor as a kickstarter for power supply?

My goal is to save energy, and I intend to do so by powering a chip with itself, and cut power whenever unnecessary. The best image I can have is of a startled monkey who jumps on the branch, screams ...
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70 views

DIY Arduino-powered 12V UPS suggestions | HELP NEEDED!

Firstly my wishes to whoever reading this piece of text, have a nice year and I hope that everyone is doing fine in this current pandemic and I think this is going to be a piece of the past very soon.....
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0answers
40 views

Power supply for servo motor [closed]

I try to built a snake robot. I used servo motors mg996r. Its Operating voltage is 4.8 V to 7.2 V and running current is 500 mA – 900mA. I used 4 servo motor. So I need a power supply that is 4*(900mA)...
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0answers
39 views

Define Arduino turn off state

I'm doing an Arduino-based project in which I want this feature: Whenever I cut the power or turn off the Arduino it should reset every pin, meaning that if I have a servo motor, and in some part of ...
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0answers
31 views

Extremely bad analog read on ESP32 while using 433MHz module

I'm currently trying to transmit data from one ESP32 to another with 433MHz modules. I also need to read some sensor readings from an Hall sensor. When the ESP32 that sends is not connected the values ...
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2answers
41 views

Connect 12V 38A battery to SIM800C GSM Module

I have a gsm module that is rated for 12V and 1A. And I also have a drone Battery that is 12V and 38A. Would it hurt the gsm module If I connect it to this high power Battery? I heard It's voltage ...
1
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1answer
39 views

How the light brightness stays constant when we increase the frequency of stroboscope

Well I am trying to make a Stroboscop. I found this code at blow: and tried. It works normally. But if I increase the RPM so decrease the "strobeDelay" time, the brightness of the LEDs goes ...
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0answers
58 views

Putting Pro-Micro into deep sleep

As similar to ESP32/ESP8266 that can put asleep for long periods of time, I'm looking for a way to put a Pro-Micro to sleep for more than 8 seconds ( no external interrupt , or RTC ), as used in ...
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1answer
35 views

Arduino boards are not working with powerbanks!

I have used many Arduino boards with adapters and other power supplies. While connecting with a powerbank for portable projects I have noticed that the power goes off after a couple of seconds and ...
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0answers
58 views

Can a 0.2V voltage drop (i.e. from 5.0V to 4.8V) cause Arduino to stop working?

I want to log wind speed, using adafruit anemometers (https://www.adafruit.com/product/1733) at three different levels. For this, I have connected an Arduino UNO with an SD logger shield (Shield ...
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1answer
55 views

Datasheet of arduino power jack

Can we find out about the parts that the arduino uses? I want to make a shield, and i bought the same power jacks. And i thought that there would be two pins, one for power, one for GND. However, it ...
3
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1answer
32 views

How to power board plus module with one battery pack

I'm someone who's very new to robotics and the physical side of computers (software guy) so apologies if this is a stupid question. I'm purchasing an Arduino Nano 33 IoT that I'll be using in ...
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1answer
61 views

Are the GND pins of an Arduino identical to GND of its power supply?

What would happen if I connected a fan as shown in the following picture: +12V is supplied by the power supply that also powers the Arduino. GND, however, is connected to a GND pin of the Arduino ...
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1answer
29 views

Will plugging in a 12v power supply in the wrong polarity to a CNC SHIELD fry my circuit or damage my power supply?

I'm currently in the process of making a DIY pen plotter using an Arduino CNC Shield and GRBL Code. Right now I'm connecting the power supply to the shield. I got a standard 12v supply and I cut off ...
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1answer
45 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=...
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1answer
34 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 ...
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2answers
53 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 ...
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1answer
49 views

NodeMCU ESP8266 Ver 0.1 not powering on with VIN

I'm trying to power on my NodeMCU ESP8266 Ver 0.1 (thats what is written in board), via VIN and Ground with my phone charger. I'm 100% sure that the USB charger is working, providing 5V, and that the ...
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1answer
51 views

Uno doesn’t get enough power from 5v barrel connector. Why?

I’m using a 5v 20a power supply run through a barrel connector into an Arduino Uno to control an LED strip. When only the barrel is connected, the green light on the Uno comes on but the yellow light ...
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2answers
52 views

Dimming this ~30V led with PWM, what do I need?

I have a street lamp with a led and simple driver in it, I don't know the exact led voltage but the driver (image attached) says 27-36V DC output, MODEL: 50W. Is there a part I could place between ...
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1answer
35 views

Multiple external power sources and one Arduino

really noob question.. I am thinking of using a 12v power source and a 5v power source as an external power supply for my 5v relay (and some other stuff that I might add up to my project that will ...
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1answer
22 views

DIY CNC Machine Power Requirements

I want to make a CNC machine that uses 5 NEMA 17 rated for 2A and a RAMPS 1.4 to control it all. I have a power supply that can deliver 1.5A at 12V. Is it enough? I am worried that when all 5 motors ...
2
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1answer
56 views

Can I power the arduino UNO through the 5V pin while I use USB cable to collect data?

I understand that if the Arduino is powered by Jack or Vin when the USB cable is connected, the internal circuitry would inderdict the USB powering. But what if I power the arduino througn 5V pin ...
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1answer
32 views

Power supply for DIY Arduino CNC Router

I am making a CNC router from a dremel and 3-5 NEMA 17 steppers. I am really confused on how I can power all those motors. I am using a RAMPS 1.4 with Arduino Mega. I have a 2.4A USB power supply. Is ...
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0answers
27 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 ...
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1answer
61 views

Can I use and external power supply and USB at the same time on my Arduino?

Can I use the Arduino with an External wall-wart and the USB at the same time? I need to power more LEDs, and the USB on my computer can only supply so much. But, I didn't want to destroy my ...
2
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0answers
34 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
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1answer
36 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 ...
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0answers
40 views

INT0_vect is slow?

I want to wake up my AtTiny45, but it looks like it needs a few nudges sometimes. I have a pull down button connected to INT0. I made sure INT0 wakes up when the button is pressed, and as soon as the ...
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1answer
21 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 ...
8
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3answers
227 views

Measuring li-ion that arduino is running from

I am using a 5v Arduino pro mini (with regulator and power led removed). I have been reading how to accurately measure Li-ion batteries when powering from the same battery you are trying to measure ...
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0answers
47 views

Arduino Uno cant be powered by VIN pin

Im trying to power an Arduino Uno from a pack of 8 AA batteries (so 12V) and it just doesn't turn on. When I connect the barrel jack, it works! Any idea why the VIN doesn't work? Thank you in advance.
2
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2answers
52 views

How can I increase the torque or speed of the stepper motor with Arduino

I run 28BYJ-48 12 Volt Motor with ULN 2003 Driver using Arduino UNO. I am also using external 12 volt power outside. I aim for the syringe pump to move back and forth with the rotation of the motor. I'...
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2answers
41 views

TPIC6B595 Output Unable to Allow Supplied Power to 7-segment Display

We have an Arduino Nano connected to 4 small (0.5") common-anode 7-segment displays and 2 large (3") common-anode 7-segment displays. We are trying to multiplex the displays. The larger one ...
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0answers
38 views

Arduino IDE on Attiny45: What kind of power does a chip need?

I have this little AtTiny45 which I'm loading a program with Arduino as ISP. My goal to use this chip along with a op amp, a piezo buzzer and a press button, and have it automatically sleep between ...
1
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1answer
64 views

How to fix HC05 burning even after while using voltage regulator?

I'm using two circuits for my wireless head mouse project, one of them is a transmitter circuit with Arduino Pro Micro, HC05 Bluetooth module, Elechouse Voice Recognition Module V3.1, GY-521 module ...
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0answers
54 views

Use Arduino Uno as 5V Power Source for Sensors Connected to ESP32 Microcontrollers

I am using an ESP32 WROVER B based microcontroller, which has 3.3V and 5V outputs. Due to poor soldering of the header and attempted removal of the solder (permanently damaged PCB etching electrical ...
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1answer
32 views

L293D motor shield

I have the L293D motor shield on top of my Arduino UNO. The L293D has a servo attached of 5 volt and a motor of 12 volt there is an external power supply. If I remove the jumper of the board and power ...
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0answers
37 views

Esp32 heating slowly

I made a small little IoT device to control my light chains from my phone, I'm using a MOSFET to turn the power on or off, using an esp32 connected to the MOSFET, both esp32 and light chain is ...
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0answers
22 views

GSM900A module is not connecting to the network

My GSM900A module is not connecting to the network. IT continuously blinks(1 sec). The power was given by the Arduino Uno board. Then I tried connecting an external battery(4.2V , 4200mAH). But it ...
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0answers
39 views

Arduino EMF doesn’t work!

https://youtu.be/y1Bke3750WE I’ve been trying to make an Arduino emf because no brand makes a commercial one like a board/module. I’ve tried connecting ones that work (circuits from store bought ...
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1answer
41 views

How to calculating requirements of power supply for a project

I am starting with electronics and been working with Arduino for some time now. I did some basic LED and servo motor project and was hoping to jump into making an obstacle-avoidance car. I used 4 AA ...
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0answers
28 views

Powering up small motor board without motor [closed]

Looking to supply power to the middle rings of this board on the back. It takes 3v to power it up. I’ve tried soldering but it’s for a motor so I’m not sure if it can stay permanently. Is there any ...
1
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1answer
48 views

Grounding Arduino UNO with external voltage source

I was experimenting with external power supplies and noticed that the only way the Arduino can communicate with an externally powered sensor (through SPI) is when the GND pin under power AND the GND ...
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0answers
25 views

I have three load cells can I sum all the three into Arduino to be one output? If yes how?

I am doing stand thrust and I have three load cells to measure the force. I would like to know if I can sum them to gather into the Arduino or I should use a junction box.
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1answer
27 views

Can you power the ESP8266E-12 with any of the 3.3V pins?

If I want to operate the NodeMCU on the 3.3V input with 2.5V to 3.6V; can I use any of the 3.3V pins to do so?
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0answers
21 views

Issue with different ways of powering

I have a project to make where I have to read tags out of 5 RFID Readers and when every tag is in correct reader to open a relay. The schematic is the same with Annaane's with the difference I have 5 ...
0
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1answer
68 views

Arduino MKR GSM 1400: Can I tell from code if the power has tripped

Is there a way to tell if an Arduino MKR GSM 1400 has lost power and has to rely on the connected battery? Ideally, I'd like to do this without adding additional circuitry. Alternatively, can I ...
3
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1answer
363 views

Arduino nano 33 ble vs ble sense. Power consumption, etc

After working with an Arduino Uno at work, I am looking to buy myself a board for some projects/experiments at home. The nano size seems like a great option, especially the one without soldered ...
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0answers
33 views

What component do I need (power)

I want to power my board using a 9v battery. I also want to power a component in my circuit from the same power source (9v battery) but ONLY when my board sends a signal (say from D1 pin). What ...

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