Use this tag to refer to the volume of electricity traveling through any given wire at any given time. It is measured in amps.
5
votes
1answer
51 views
Methods to prevent Accelerometer values changing from current spikes
I've connected an Arduino Uno to a MAX7219 IC, which is connected to only one standard 8x8 LED matrix, and an ADXL355 3-axis accelerometer. I use the matrix initially, and turn on all LEDs, while ...
1
vote
1answer
40 views
Formula for current through shift register
Hi
I am programmer that just started learning electronics and Arduino. I built this simple circuit on Autodesk Circuits earlier. Originally I used 220 ohm resistors. Then when I ran the simulation ...
-1
votes
1answer
70 views
Will 5V 2A current input to the power port kill my Arduino? [duplicate]
I want to power my Arduino with a mobile charger, the out put is 5V 2A, will it kill my Arduino? And what's the max input current as power source?
0
votes
0answers
39 views
Detecting presence of current with ACS712 (not getting the value of the current)
I need to detect the presence of current in a circuit by using hall effect.
In fact, my exact need is need is a digital (HIGH or LOW) signal for a multiplexer input.
The common hall effect current ...
2
votes
1answer
59 views
What's Leonardo 5V pin current limit?
I'd like to know how much current can supply the 5V pin and the 3.3V pin on an Arduino Leonardo board. I've been lead not to trust the specs on Arduino's website. And, as an added question, can the 5V ...
4
votes
2answers
38 views
Arduino Uno VIN 2A
Trying to get started with the Arduino, so I'm trying to do something kinda simple. I'm following this tutorial: Build Your Own Dynamic Ambient Lighting For A Media Center
However, I'm still confused ...
0
votes
1answer
100 views
How do you use an Arduino to control a 4 - 20 mA transmitter?
I am using an Arduino Mega to control the speed of an AC pump. This can be done by connecting to the variable frequency drive. Here is a link of the relevant datasheet, pages 66 and 67 relate to what ...
0
votes
1answer
91 views
ACS712 Not working correctly with Arduino
So I have the basic setup ready with one relay that is controlling a 200W bulb. The Phase of this bulb is passed through a current sensor acs712. While running a simple analog read example sketch, I ...
0
votes
0answers
93 views
How to connect a WCS 2750 current sensor to arduino?
I am using a WCS 2750 sensor to sense the current of a 3 phase motor. But the sensor output seems to have DC offset of 2.5V. It would we really great if someone could guide me on this. Thanks in ...
1
vote
1answer
151 views
Understanding flow of current with pull-up and pull-down circuits
I am new to all of this and was trying to figure out what was happening with pull-up/pull-down circuits. I think I understand what happens when the board handles the pull-up/pull-down but I wanted to ...
0
votes
1answer
53 views
how to interface WCS2750 with aurdrino to make an automatic feeder for a masala chakki (MILL)?
it senses the current and rotates the shaft of a auger dispenser (like used in a cat feeder) using a servo motor to make it fully automatic and efficient.
and turn off the motor when there is no load ...
0
votes
0answers
32 views
High Voltage/ High Current Problem?
I am planning on building a pump and will be using a High Torque Nema 23 CNC Stepper Motor 3.5A 3Nm(425oz.in) 23HS45-3504S. Because of the voltage difference I will need to use a driver which I have ...
0
votes
1answer
45 views
Peristaltic Pump Project
I am designing a peristaltic pump and need some advice for parts. I am using an Arduino Leonardo and also have an UNO and am planning on adding a temperature and pH sensor as well. I have two ...
1
vote
1answer
154 views
Is it safe to power the Uno with 18v?
So I'm aware the Arduino Uno can take 6-20 volts, with a recommended voltage of 7-12. But I have an unregulated 12v power adapter, which puts out about 18v with no load.
Most of the time the Arduino ...
0
votes
1answer
58 views
What happens if I draw too much current from ATMEGA IO pin?
I revisited an older device that I made and discovered, that I had an 8 Ohm speaker connected directly to ground and an IO pin of an Atmega328P. According to my calculation that means that the pin ...
1
vote
2answers
176 views
How to convert voltage to current from ACS712-20A?
I've been used the ACS712-20A to measure the current flow. Actually I used LIFA program (LabVIEW interface for Arduino).
I used this equation:
current = ((analog read)-2.5 )/ 0.1
But I am still not ...
0
votes
1answer
34 views
What would the total current requirements be for these items?
I'm using 5 of those 8mm NeoPixels + a 5V Trinket.
I'm trying to get a rough estimate of the current requirements that would have, assuming all 5 NeoPixels were running at full brightness "white" (...
-1
votes
3answers
106 views
Low current in a motor used in a line following robot
I'm trying to make a line following robot for my students, the problem is that I have not done any calculations (I don't know how).
The motor can't move the robot unless I connect it directly to the ...
0
votes
1answer
61 views
Measure current and consumption
I'm trying to measure kWh with an Arduino that I have connected to a ESP8266 that communicates this value to a web server I have. And I've been trying to find the best and easiest way to go about this....
0
votes
0answers
46 views
Is it possible to sense 220V AC current using a reed switch?
I have a light switch in the room and also a relay connected to Arduino (Multi-way switching). I can turn on and off the light from both places. But there is a problem - the Arduino doesn't know about ...
1
vote
1answer
41 views
How to reduce current from a AC TO DC power supply for arduino use
I have a AC to DC converter that was originally used for recharging the PSP, I stripped the 2 wires of the output and was wanting to use it for my arduino instead of using a 9V battery, it's output is ...
-1
votes
1answer
62 views
What is a current consumption of arduino nano [closed]
What is a current consumtion in normal state and idle of Arduino Nano on 5V without using leds and suppling power by pins?
-1
votes
3answers
38 views
Is that correct that input and output pins are not supposed to have current through them?
Are input and output pins not supposed to have current through them and only either apply voltage or "measure" it?
0
votes
2answers
43 views
What minimal resistance should be between an input and output pin not to burn Arduino?
So, I'd like to put a button between input and output pins to read when button is pressed. What minimal resistance should I add to the scheme not to burn Arduino when the button is pressed? Does this ...
0
votes
1answer
43 views
How to use unregulated VIN voltage?
I have recently bought an Arduino Mega, and I am powering it with a USB charging port, 5V at 1A. I need to use the 1A with a transistor, since the Arduino itself can only supply a maximum of 20mA ...
0
votes
3answers
64 views
Max current through an Arduino Mega?
How much current can I put through the pins of an Arduino Mega at the same time?
The situation: I am building a 7x7x7 LED cube, and my plan was to multiplex in 7 layers of 49 pins, lighting each ...
1
vote
3answers
83 views
The importance of I/O pin DC current
I am thinking about buying Arduino or Raspberry Pi. I generally know Arduino advantages (fast start-up, low consumption, ADC converters) and disadvantages (low memory, low connectivity, hard ...
0
votes
1answer
38 views
Issues on Arduino, LiPO battery and two mottors setup
My main objective with this project was to control these two DC motors with an Arduino Nano (it is not a UNO), powered by a 3-Cell 750mAh LiPO battery (both the motors as the Arduino itself). So, I ...
0
votes
1answer
46 views
Sizing relays for audio circuit?
Non-technical person here, so please be gentle. I moved into a place that has ceiling speakers in each room (I tried, but they don't come apart, aren't marked other than manufacturer, and that is a ...
0
votes
0answers
20 views
Insufficient current through Adafruit Motor Shield [duplicate]
I am currently using the Adafruit Motor Shield in conjunction with an Arduino Motor Shield to control two 7.2V DC Motors. The DC Motors are being powered by a 7.2V, 3000 mAh Nimh battery. When the two ...
1
vote
2answers
32 views
Driver shield providing 24+ pins at 100mA (for Mega 2560)
Do any shields (or similar boards) exist to let the Mega 2560 (or Due) output a full 100mA per pin on at least 24 pins, in a digital on/off fashion? I know there is a motor shield, but it looks to ...
2
votes
1answer
181 views
“tamper” circuit of a reed switch: can I connect the two wires to an INPUT and an OUTPUT pin?
While working for the automation side of my new house, I'm currently in the process of installing several reed switches on top of external doors and windows.
Even if this could be used as a "...
4
votes
2answers
282 views
Arduino potentiometer example: what limits the current?
I have a question regarding potentiometer example:
https://www.arduino.cc/en/Tutorial/AnalogReadSerial
If I turn the potentiometer to the marginal position and have 5V at A0 (and almost zero ...
0
votes
1answer
204 views
Will this AC-DC converter chip really work with arduino?
I am looking for a compact solution to convert some 220V/20amp AC to something edible by our arduinos (like 5V/2amp DC). I would like to plug directly my arduino to the wall. I found many things like ...
2
votes
1answer
50 views
What is the Proper Voltage to supply an enough Current to the Arduino
I'm just confused about the supply that I should use in driving my arduino. Is it okay to use a 3.7V with a 1000mAh to supply it?
I will be using a Lilypad Arduino.
Your replies would be a big help ...
5
votes
1answer
501 views
ArduinoMEGA: 64 digital inputs cause random digitalRead values
I have 64 hall effect sensors (magnetic field sensors) (DRV5023AJQLPG) connected to an Arduino MEGA 2560. For that, I use 48 digital pins and 16 analog pins as digital input pins. The program in the ...
3
votes
1answer
60 views
What is the Maximum Current an Arduino can Supply?
I was wondering how much my Arduino I/O pin can output when it is set at Output and is at High.
I am using an Arduino Uno R3.
Thanks in Advanced.
0
votes
1answer
885 views
ACS712 sensor reading for AC current
I'm trying to track down a clearly/simply articulated piece of code to take a reading from the ACS712 current sensor (link to download PDF data sheet).
I understand that these sensors are noisy, and ...
1
vote
2answers
241 views
Arduino Power - DC adapter
I have a 12V 2.5 ampere Dc adapter.Can i use it to power arduino uno board?
It says on the arduino website that i can use 9-12V and upto 1 ampere. I am concerned with current limit here..
0
votes
1answer
699 views
Can I use 5V 1A Adapter to power Arduino UNO?
I have two Adapters, one is rated as Output 12V 500mA (used to power an old modem) and another one is rated as 5V 1A (old mobile phone charger).
My question is can use any of these to power my ...
1
vote
1answer
183 views
How can I power an Arduino in a 3-phase environment?
I am working on a project which uses an Arduino board. Currently I am testing my device using 2-phase power and it works fine. I want to use that device in agriculture fields where 3-phase power is ...
0
votes
1answer
303 views
How to measure relay current draw from Ardiuno
How does one measure the amount of current a relay is drawing from an Arduino?
Do I connect a multimeter in series with the digital pin to which the the relay 'IN1' is connected (in this case pin 7),...
1
vote
2answers
127 views
Circuit doesn't work when multimeter/current meter is attached
I'm working on a battery-powered data logger, using a bare Atmega 328. I'm using sleep between sensor readings, via the Narcoleptic library. Everything seems to work fine, until I connect my ...
0
votes
1answer
28 views
How much voltage/current do I need for multiple chips?
I have a Huzzah ESP826 Wifi breakout chip which requires 3.3V power voltage and peaks at 500mA of current, and an LED strip which requires 12V and 1A. How can I power both with one dc jack (I have a ...
0
votes
1answer
358 views
Powering multiple servos on external battery
I am working on a project with my school's 3D Printing Club where we are making a humanoid robot and I am attempting to wire the arm at the moment, and program the hands to translate text to sign ...
0
votes
1answer
52 views
how much current does Arduino Nano draw when only using 8 digital pins?
I want to connect an Arduino Nano to an Intel Minnowboard Max (it's like a Raspberry Pi). I know Arduino can draw up to 500 mA current through the USB connection. Since I already need the USB to ...
2
votes
2answers
89 views
Deviation of power consumption between datasheet and real world?
According to the Atmega328P-PU Datasheet (side: 589) the current consumption of the microcontroller should be around 9.5mA (at 16MHz and 5V).
But I measured 15mA. (Nick Gammon who did some pretty good ...
1
vote
1answer
210 views
ACS712 inacurrate reading. Wild jumping
I'm trying to use my 30A ACS712 on my OSD (it has ATMEGA16L).
But it is very unstable, 0 amps goes from 450 to 445, but that isn't that bad, but when I put 10A of current through it jumps from 440 ...
0
votes
1answer
562 views
How to connect this motor driver board to Arduino to drive bidirectional motor?
I am familiar with using PWM on Arduino and have done so with simple 3-pin interfaces: e.g. PWM, DIR (direction) and GND pins. Choose a direction with DIR, set speed with PWM in software (0 - 255), ...
2
votes
1answer
132 views
How to calculate voltage?
I want to check each cell voltage using arduino.
and how to calculate dc current using CT Sensor using Arduino?
