Questions tagged [current]
Use this tag to refer to the volume of electricity traveling through any given wire at any given time. It is measured in amps.
194 questions
-1 votes
1 answer
761 views
How to power 2 MG996R towerpro servo
I am a beginner and tried powering MG996R Tower Pro (180 deg Metal Gear) Servo from Arduino UNO and ended up hibernating the host PC. I want to power 2 such motors (in parallel configuration) for lets ...
1 vote
1 answer
297 views
Microcontroller freezes when triggering the gate of an N-channel MOSFET
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 ...
- 191
0 votes
1 answer
328 views
What is the max output rating of the pins on the Arduino Mega?
I have conflicting information on the max output rating for the Arduino Mega. Some say 200 mA and others say 800 mA like the Uno board. I am running 8 model railroad signal devices that have (3) 3mm ...
- 17
1 vote
1 answer
833 views
How much maximum current do the Arduino Wemos D1 (R1 & R2) consume?
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 ...
- 252
2 votes
0 answers
159 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
1 vote
0 answers
42 views
Poor Contact and Low Current Issues with Microswitches in Arduino USB Game Controller
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 ...
- 11
-1 votes
1 answer
102 views
Arduino battery capacity selection based on the current measurements
I'm sorry for this stupid question... I'm not an electronic/electric expert.. In order to select the battery capacity as well as the solar panel I'm measuring the Arduino current consumption. So, I ...
- 101
1 vote
0 answers
389 views
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
0 votes
1 answer
504 views
Driving higher loads with PWM
My Arduino Pro Micro can source 500mA from 3.3V VCC, when it is USB powered. The chip itself, is rated for 200mA, though, and its output pins for 20mA recommended, 40mA max. I am looking to have 3 PWM ...
- 219
0 votes
2 answers
5k views
How do I find out the maximum current through VIN on a NodeMCU board?
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 ...
- 115
2 votes
1 answer
131 views
Pull more than 250 mA from powerbank-powered Teensy 3.6
I'm using a powerbank speced 5V at 2.4A to power my Teensy 3.6 via the USB port. However, Teensy recommends to not pull more than 250 mA from its 3.3V pin. Is there any way I can pull more current, at ...
- 163
1 vote
0 answers
786 views
PZEM-004T can't read current
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....
- 56
0 votes
1 answer
1k views
Safe to power LED strip via ESP32 GPIO
I want to rewire a battery powered LED strip (as shown in the picture below) to power via an ESP32's GPIO pin. I have a ESP32 NodeMCU Development Board, powered via USB. The LED strip has specified 3,...
- 105
1 vote
1 answer
172 views
LEDs not lighting up even though current is flowing through them, problem with ground?
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 ...
user77534
0 votes
1 answer
75 views
Is it possible to use the same power source for the arduino and a high current
I've need to control some leds which draw 300mA with an arduino (actually an atmega) and after some searching I think the following is the circuit I need, but I'm not really sure if the power source ...
- 9