Questions tagged [electricity]

Use this tag to indicate the flow of electricity at higher voltage than that used in Arduinos themselves. Examples can include having an Arduino use a relay to switch the electricity for a 120 Volt device like a fan or a light.

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2answers
47 views

Arduino Micro & Thin polymer lithium batteries [closed]

Is this battery: Polymer Lithium-ion Battery Model Number: PGEB014461 https://www.powerstream.com/p/PGEB014461.pdf Producing enough energy to power the following Arduino-micro project: ...
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2answers
34 views

Whats the maximum external voltage/current i can apply through an Arduino Uno ? + a couple mini questions

i'm just starting out with electronics and Arduino's and was wondering about the extent of an Arduino's ability. Will i eventually be able to program and power very high voltage/current requiring ...
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1answer
35 views

Help with coding Arduino Nano to run fan through slide switch at specific intervals

I’m trying to use Arduino Nano to run my 5 V PC fan, which, I know it sounds crazy, it’ll be mounted on a piece of Tupperware that’ll control the airflow through it via the fan. However I have no ...
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1answer
24 views

Calculate burden resistor value of current transformer and measure ac current with arduino

I Want to measure AC current with current transformer but i dont know exact value of burden resistor or calculation formula...i want to measure current of borewell pump. company specified pump as 1....
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4answers
77 views

Weight Measurement System using arduino and load cell

I want to use a load cell (Capable of measuring up to 1 ton) connected to a arduino board. I am a beginner, my questions are as follows : 1. How to calculate the current generated by the load cell ? 2....
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1answer
85 views

Attiny85 route vcc though output pin

I'm still learning the basics so please bare with me if something seems unclear ;-) I want to hook up an Attiny85 to a WiFi module (esp8266) and 2 sensors. The VCC will be provided by a battery pack ...
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1answer
801 views

Electric meter pulse counting using LLC

I am trying to create an electric meter reading setup for Arduino, and I have been searching for it and almost every posts available is using LDR sensor. http://www.reuk.co.uk/wordpress/solar/...
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2answers
6k views

How to measure electrical conductivity using Arduino?

I want to measure TSS(Total soluble salt) in soil. I have found in some literature that, through measuring of electrical conductivity, it is much easier to measure TSS. So, I thought, If I can measure ...
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3answers
69 views

How to embed a 5V-range Arduino-based controller in a 12V-range DC circuit?

We have an installation that provides: a common line (C), which divides into two wires; an input line (I), which carries the signal from a button (between I and C there's normally 0V, and 12V when ...
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0answers
47 views

check if a fuse is good or bad in an ac circuit using arduino [closed]

I have a fuse in a ac circuit of which i want to check if the fuse is ok or not. I'm wishing to wire up two nodes of the fuse holder and determine the fuse status. I have a plan of notify user if the ...
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2answers
1k views

Can you use an input pin instead of ground in Arduino circuitry?

Beginner here: Would the circuit in the picture work or do input pins not absorb the energy as ground does? I know setting the pin as an input makes the direct 5V connection safe but maybe I'm ...
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2answers
73 views

Grounding for arduino, measuring phase controllled 240V

I would like to measure a phase controlled 240Vac waveform as a digital PWM input for an arduino. The signal would look something like this: My intent was to use a zener clipping circuit to limit the ...
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3answers
101 views

Powering on the PC

I located the two pins that are responsible for powering up the PC. They are connected to the Power On button and one pin has an output of 5 V while the other is the ground. So far so good, the ...
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1answer
62 views

Simple Ground circuit layout

I am making a circuit without using a PCB or perfboard and i am unsure if i am running the ground wire correctly. I usually prototype on a breadboard with the ground all joining on the far right, is ...
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2answers
225 views

Arduino Nano Circuit grounding

I am making an LED circuit for a Lobot (from star wars) costume headset that will not be on a PCB or stripboard. It will all be running inside the walls of the plastic shell I am making. Please see ...
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2answers
59 views

Easy bipolar motor control?

Is here some easy way to control bipolar motor without using any other external devices, drivers or shields? I have small motor from CD-ROM so I expect it's low voltage. By control I mean just ...
2
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1answer
261 views

Arduino connection to brainwave analyzing module

I want to connect a TGAM module (detecting brainwaves) to an Arduino Uno. I know little of electronics, can someone advise me? To which pin of the Arduino should I connect the TGAM? How to get the ...
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3answers
1k views

How to power my Arduino mini using wall socket?

I am trying to power my Arduino Mini (which is connected to IR receiver and a relay board). The idea is to hide the entire setup behind the electrical board including the power supply. I have hacked ...
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4answers
964 views

Pulldown resistors and multiple switches

Maybe this is a question for Electronics SE but I’m not a member there yet so hopefully someone will have an answer here. I did an experiment with having some push-to-make buttons connected to my Uno....
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3answers
416 views

How safe is it to use my body as part of a circuit?

I have two polystyrene balls wrapped in copper tape. When the balls touch, the tape completes a circuit from a digital pin on an Arduino inside one of the balls to an Arduino inside the other (both ...
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2answers
796 views

Making three led's blink at different times in Arduino

I have a breadboard connected to an Arduino Uno, 220k resistors connected to an led, of course it has a common ground and a pin connected to 5v. All pins are digital. Now, I want led 1 to turn on ...
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2answers
428 views

Split Power supply in voltage and gnd?

I am new to electronics and arduino in general. I need to split a power supply in gnd and voltage. Basically, the power supply has one single wire (with the voltage and the gnd passing through it i ...
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2answers
148 views

Proximity sensor without proximity sensor; is my hand magic, my competency crap, or my arduino fried?

here is a very simple circuit, with a LED between pin 2 and ground, and a loose wire in pin 8. Here is the sketch that was intended for use with a small 4-contact switch like these in every arduino ...
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5answers
8k views

LED fading effect using a push button

Guys please help me out in verifying my program for my project -- led fading effect using a push button. My project is simple, I want to start the LED fading effect (i.e., glowing and dimming one ...
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2answers
51 views

Opto Isolator question

I'm building a CANBUS network based on an arduino to go into an offroad racing truck. The vehicle has two separate battery systems, and I would like to monitor the voltage while still electrically ...
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2answers
45 views

Power converting - up or down?

Sorry if there is an obvious answer to this - I'm pretty new at Arduino and electronics. I've searched a bunch, but I think I'm too vague - and don't know what terms to look for. I have a pretty ...
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1answer
7k 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 ...
2
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4answers
11k views

Connect HX711 to a three wire load cell

I have the following load cells: I'm using the following HX711 amplifier Every guide i can find on the internet describes how to connect a load cell with four wires to the amplifier. How can i ...
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2answers
864 views

Powering arduino and 12V Fan from same supply

I have found a relatively small 12V switching power supply that I want to build into my device, using it to power both the Arduino Pro Mini and a couple of 12V cpu fans. Am I correct in assuming that ...
2
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1answer
343 views

Arduino as voltage monitor shorts to ground

I need to monitor voltages of several DC circuits in a generator's contact box. Whenever the generator has an alarm, a LED is lit in the box and voltage on the line drops to zero. I successfully get ...
3
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2answers
716 views

How to protect my arduino, while hotplugging its power supply and other related electronics

The unsolved: when I connect power and signal lines to my Arduino - while power is on - I potentially kill it. I have fried 2 so far. Situation: I have build an DMX-controlled lighting fixture, ...
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1answer
127 views

difference between output pin high and 5v pin

So this might be a total noob question (which admittedly I am) I have a Motor, if I connect it to GND and the 5V output it runs. Ok so far. But if I connect it to GND and a pin set to OUTPUT and HIGH ...
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2answers
235 views

Can I use relays with 10A125V~ for my 220V~ applications, safely?

I am using the TinkerKit Relay Module and recently they changed the relay mounted on the board from a white one with 10A250V~ to a black one with 10A125V~. In my country the voltage is 220V~. Can I ...
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1answer
4k views

Arduino output pin from 5V to 3.3V

I just have a question regarding Arduino output-pins and Voltage divider, because I am getting other results than what my calculations are giving me. I have measured the output-pin (from the Arduino) ...
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1answer
773 views

Why does arduino work on usb power?

The arduino website states that the operating voltage of an arduino is 7-12V. Why does the arduino work powered on just usb then? As usb only outputs 5V and 500ma. Is it preferable to say run the ...
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2answers
1k views

What sensor would detect the black stripe on an analog electricity meter?

I have an analog electricity meter (AEM) and I would like to track my usage of electricity. I've attempted to use the EE-SY310 photo sensor, but that's not sensitive enough it seems. I suspect the ...
6
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2answers
2k views

How to measure voltage with Arduino analog input

I'm totally new to Arduino and to electrodynamics in general. I'm wondering what happens if I connect my digital pin to an analog input on Arduino, and make digitalWrite and analogRead on the ...
5
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1answer
245 views

How can Arduino control with a servo with only one wire?

I was playing with getting my servos to be on dedicated power, separate form the Arduino entirely, but obviously controlled by the Arduino. I originally had the ground of the Arduino joined with the - ...
28
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14answers
44k views

Most compact method of powering Arduino from wall socket

There are a lot of methods to power an Arduino from a large range of voltages: USB cable from PC or from a phone charger or an USB hub step down converters step up converters switching power supply ...
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1answer
139 views

Circuit diagram interpretation and electrical flow

I'm new to Arduino and consequently, to circuits. I've been reading Arduino Robotics by Warren and this was a circuit present in the book. From what Warren has said, electricity in the circuit ...