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Use this tag to refer to the volume of electricity traveling through any given wire at any given time. It is measured in amps.

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I am new with Arduino. For a personal project I have an Arduino uno that is connected to this IR Trasmitter: For arduino I have connected the +5V on VCC, GND PIN to IR transmitter GND and the PIN out ...
GiordiX's user avatar
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Disclaimer: I have asked questions about this project before but this is yet another issue I'm facing. What I really want to do: Build a battery powered device with 6 colored buttons. When you press ...
boop's user avatar
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I have been powering my WeMos D1 R1 and D1 R2 Arduinos (with ESP8266) using a simple USB cable connected to a standard charger whose rating is 3.1 amps. Is this sufficient to charge two such Arduino ...
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I have made a USB game controller using the Arduino Micro and Omron microswitches (VX-01-1A3) for the buttons. The switch is wired with one end connected to a digital pin and the other end connected ...
gon weigang's user avatar
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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 ...
pte's user avatar
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I read this answer https://arduino.stackexchange.com/a/51878 to a different, but related question. It seems like VIN on the NodeMCU is directly or via diode connected to the USB connector. Image ...
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I'm trying to measure the current, voltage, and power of AC load using Peacefair PZEM-004Tv3.0 module. For the serial communication of this module, I'm using SoftwareSerial Pins 2 and 3 on Arduino Uno....
Nebula Shade's user avatar
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I'm using a 74HC595N shift register to light up 8 LEDs but for some reason they won't turn on even though current is flowing through all of them. I provided an image of my circuit below, there is a ...
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I want to measure current using the MAX471 sensor that outputs voltage proportional to the current (1V/A according to the datasheet). To test the module, I connected a 330 ohm resistor to the sensor ...
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I have two ACS712 sensors, one rated for 5A, another—for 20A. I wanted to test how precise they are, and played with different devices (in my case, old PC fans). I copy-pasted the source code from ...
Arseni Mourzenko's user avatar
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I've been learning Arduino for a while, and for my next project I'm attempting to build a drone. When I tested the motors that I purchased before, they seemed to work fine using the PWM pins and I saw ...
john papp's user avatar
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I would like to a build a temperature sensing variable speed fan controller for my truck. Currently using a purchased 2 speed on/off relay based controller, but my fans are overloading the whole ...
WMIF's user avatar
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i want to use volte and current sensors (ZMPT101B and ACS712) on node MCU these sensors are analog but node mcu has on analog pin can i use digital D0 pin for voltage sensor?
mohamed mansour's user avatar
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My task is to find the amount of current a light bulb uses, with that motive I used ACS712 current sensor of 30A connected all the connections properly as shown in the circuit diagram below I tried ...
user70430's user avatar
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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 ...
adrianTNT's user avatar
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I have a WS2812b addressable RGB led ribbon that is 5m (150 RGB leds). I purchased a 5v 10amp power supply to power it; however, whenever I try to use it to power the LED strip the leds start flashing ...
Phillip Clontz's user avatar
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From what i see that 3.3Vpin provide 3.3V and 400mA. The fingerprint module i use is AS608. Connecting the fingerprint module power pin to 3.3V of the nodemcu. From the datasheet it only can handle 3....
i suck at programming's user avatar
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Even though this is already a well-debated topic, I couldn't find an extensive discussion about what really is drawing so much power in Arduino's board. Here is the preamble: I have an Arduino Mega ...
Tripola's user avatar
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I've got 12V / 400mA power supply for my Wemos D1 R1, and I'm using VIN output(I need 12V for led strip). I need to change this power supply because of color, and I can't find similiar with the same ...
mayerpaw's user avatar
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I've got 4x 12V 6a peltiers and some 3d printer mosfet controllers to drive them using PWM with my arduino. But I've found the mosfets need ~7V to switch on, so I'm now wanting to control them with ...
Oliver Walters's user avatar
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I'm rather new to Arduino. I've been performing some current consumption measurements lately, with a INA219 current sensor, on the blue LEDs from a starter kit. I plugged three LEDs, on pins 2, 3, ...
Thibault Beziers la fosse's user avatar
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I am trying to reproduce the side-channel power analysis attack described in this paper: https://pdfs.semanticscholar.org/7946/a8ee82658e2ffb017270331f220a55f5ace6.pdf for educational purposes. The ...
genghiskhan's user avatar
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I'm trying to figure out why my attiny85 (on a digistump developer board) draws around 3mA at 3V when setting up a pin as INPUT and connecting it straight to ground. The current is measured with a ...
schneida's user avatar
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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 ...
user463102's user avatar
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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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