Questions tagged [hardware]

The physical circuitry and other components of a machine or device. This is distinct from the program code running on a device, which may be called software or firmware.

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41
votes
5answers
43k views

Difference between Arduino.cc and Arduino.org

Recently I have noticed that there are two arduino sites, arduino.cc and arduino.org. They both have the Arduino logo and both sell what seems to be official Arduino boards. Also, arduino.org came ...
16
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4answers
4k views

Burning Arduinos one after another

I very accidentally caused a short-circuit to two completely different cheap (under 4$ each) Arduino Uno clones, rendering Windows sound alert for unplugged USB several times. This subsequently led ...
16
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1answer
8k views

How does serial communications work on the Arduino?

With reference to the Arduino Uno, Mega2560, Leonardo and similar boards: How does serial communications work? How fast is serial? How do I connect between a sender and receiver? Please note: This ...
14
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2answers
20k views

Controlling Floppy Disk Drive with Arduino

I am having problems controlling a 3.5" Floppy Disk Drive with an Arduino Uno. I have the floppy disk drive powered with a computer power supply that is switched on, and the Arduino powered by my ...
12
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5answers
4k views

Does an Arduino get worn out by too much command execution?

Excuse me if it is a silly question, but I couldn't find an answer. I've been wondering for a while whether an Arduino (or generally any other micro-controller) gets happy if the code is light and ...
11
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1answer
19k views

Difference between these two NodeMCU boards?

I recently received a NodeMCU (identical to the one shown in the first picture below) and originally, I was unable to connect it to my computer which eventually turned out to be driver issues; however,...
10
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1answer
2k views

What is the purpose of the I/O pin capacitor on the AVR microcontroller?

What is the purpose of the capacitor on the I/O pins on the ATmega328 (I imagine it's on other AVR microcontrollers as well)? Is it to reduce noise from other parts of the microcontroller?
9
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2answers
39k views

Re-use smartphone/tablets parts like a camera

For learning and hacking purposes, I plan to study and use parts from smartphones and tablets like Galaxy or iPhone. They are really efficient and pretty cheap... Did anybody do this before? If yes, ...
7
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5answers
2k views

When Raspberry Pi is preferred over Arduino

We are doing some projects in class. One of my friends is doing a weather and humidity station using raspberry Pi with a couple of sensors and LCD. I have a little experience in Arduino. So I asked ...
7
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2answers
434 views

Is there a way to make wiring a bare microprocessor to a shield easier?

I currently do most of my AVR work on breadboards, but the large variety of Arduino shields and code out there makes me wonder if I'm not beating my head against the wall sometimes, and looking up ...
6
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1answer
958 views

A good water flow meter to monitor home usage with Arduino

I'm searching for a good water flow meter to add to my home controller project with Arduino. I have been searching in several pages and I only found some devices that work for low flow. I need to ...
5
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4answers
221 views

Breadboard for kids

I am interested in teaching young kids how to build arduino projects. I was thinking that using a breadboard may be difficult for them, as the holes are all very close together. It is easy to put the ...
5
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2answers
13k views

Do I need to supply the 12V connection to an HDD

I'm working on trying to control a hard drive with an Arduino Uno, but I'm having trouble with the power supply. From what I know, both the Molex Mate-n-Lok and the new SATA connectors both have 2 ...
5
votes
1answer
321 views

What is causing my Uno to wake up?

NOTE: this code was working perfectly fine in another program. I have a simple piece of code that puts the Arduino to sleep. When it is finished and intergrated into my project, it will only wake the ...
5
votes
3answers
2k views

Can I use an ATmega328 alone without anything and what is the max voltage I can power the atmega328 with

Okay 2 questions. If I am to replace the Arduino with an ATmega328 programmed with a standard blink on pin 13, is this configuration correct, do I still need oscillators and whatnot? Second question ...
5
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2answers
986 views

Power on reset with arduino uno can never happen. Can this be fixed?

When an Arduino Uno is powered on, the USB chip's DTR output pin may (is, in fact) low for a while. This means that the capacitor C5 is connected from the 328p reset pin to ground. Thus, when power ...
5
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1answer
156 views

USB cable connector

The arduino has a USB port which can connect to a computer. The cable used to make this connection has a standard USB connector at one end (that connects to the computer) and a "larger" connector on ...
4
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3answers
10k views

Help with parts identification from arduino starter kit from aliexpress

Ordered an arduino starter kit from aliexpress Link The parts list they provide (as a jpg on the order page) is vague and not very descriptive, I've gone through most of the parts and am down to ...
4
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2answers
4k views

How to increment and decrement an output voltage by using two buttons?

I'm trying to create a code using an Arduino Uno board to increment and decrement the output voltage of the Arduino Uno which is 5 volts and I need to step it up to 10 volts which I have done below. ...
4
votes
2answers
4k views

SIM800C developer board “SIM not inserted”

I bought this SIM800C development board (vendor unknow): I conected it to an Arduino and put a brand new SIM card in it. This is the model of SIM I'm using: Problem is, development board doesn't ...
4
votes
1answer
51 views

What controller should i use?

I'm working on a little DIY project in which I intend to make my own dataglove. Now I'm kinda stuck on choosing the right microcontroller. And since it can be quite costly, I thought to ask for some ...
4
votes
1answer
499 views

Difference in Arduino pin distance

I have an Arduino Uno rev 3. Today i tried to mount a breadboard as a shield for my Arduino on top of it. I plugged in the pin headers i bought and was surprised that the breadboard won't fit. As you ...
4
votes
1answer
467 views

Interrupt fires a random number of multiple times for one pulse

This is my first time posting on this forum. I have tried to format this question properly, but let me know if I need to correct anything. I searched to see if someone else had a similar problem, but ...
3
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1answer
5k views

Can both the 3.3V and 5V pins on the Arduino be used at once for power?

I'm supplying power to Arduino via PC USB.
3
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3answers
9k views

Sending IR (NEC)-Signals with Arduino

I have an Arduino Micro where I want to control a display with IR commands. So the Arduino should send the IR commands to the display. I have found a library "Arduino-IRremote", which I am using to ...
3
votes
1answer
836 views

What USB to UART chip provides highest data rates with Arduino boards?

Checking out online stores for a USB/TTL adapter, I came across a wide range of products, and I'm having a hard time selecting the one which would achieve the highest data rate. I was comparing ...
2
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3answers
1k views

Do Water sensors Rust?

I'm new to Arduino and still learning the basics. I tried reading water level by using this sensor I left it in the water for about 5 minutes then I noticed it changing color (some parts darker than ...
2
votes
4answers
184 views

Program Arduino then Remove Atmega?

Can I program an Arduino and then remove the micro-controller from it and use it on a breadboard without reprogramming the micro-controller again? My steps would be: create my Arduino code. I upload ...
2
votes
1answer
162 views

USB DEVICES WITH THE 32U4?

I have an Arduino Pro micro and I need to know if it is possible to use an USB device like a camera or things like that Since the processor is a 32U4. the USB Shield is for the Arduino Uno and I don't ...
2
votes
1answer
264 views

How can I switch a 1.5V buzzer with my Arduino?

I want to make my alarm clock “smart”. I'm very new to this stuff, that is, the hardware side. The programming shouldn't present too many problems. I’m currently experimenting with a simulator (http:/...
2
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2answers
920 views

ATMega328P-PU not working

I bought some material on the net to start working with Arduino. I didn't want to buy an Arduino, since it costs a bit too much IMHO, so I bought an ATMega328P-PU, and made an Arduino on a breadboard. ...
2
votes
3answers
124 views

Sensing horizontal tilt

I'm building a digital gear shift knob, which would display current gear (1-5, R) and based on readings from OBD-II change color when gear shifting is required, to save on fuel consumption. I need a ...
2
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2answers
136 views

'Basic electronics' resources [closed]

I've seen that there are many resources on programming basis for arduino for people that have some electronics basis or background. Are there similar resources on the opposite? Basics electronics for ...
2
votes
2answers
543 views

How to calculate the needed voltage and current to supply for Arduino

I have Arduino MEGA and I'm connecting to it 5 servomotors. { 3 TowerPro M995 Basic Information Modulation: Digital Torque: 4.8V: 130.5 oz-in (9.40 kg-cm) 6.0V: 152.8 oz-in (11.00 kg-cm) Speed:...
2
votes
1answer
179 views

Due : DMAC BTSIZE trimmed modulo 8192?

On Arduino Due, I set-up DMA transfers using direct control of memory mapped hardware registers. There is a 16-bit BTSIZE field in CTRLA which indicates the number of (width sized) transfers. If I ...
2
votes
1answer
3k views

Read signal from USB mouse on an Arduino ?

I've got a project where I'd need to read my mouse's signal. My mouse is a G700S (so USB) and the thing was I don't really know how to do and even if it's feasible. I'm using an Arduino Micro and my ...
2
votes
2answers
2k views

Arduino selection for RTOS

I am brand new to Arduino and am having a difficult time understanding the "lay of the land". I'm looking for the beefiest, fastest, most compute-centric Arduino available to the market that will run ...
2
votes
1answer
123 views

What are the environmental requirements of an Arduino?

I'd like to use an Arduino Yún in a somewhat outdoor environment (in a metal box on a truck). I think I've seen that the temperature requirements of the Uno are -40 °C to +85 °C, but I can't find ...
2
votes
2answers
521 views

Powering Arduino from a shield

I'm designing a shield for Arduino which drives two stepper motors. They are small and require 5V but their max combined current is around 1A, way too much for the USB supply. Therefore I will have ...
2
votes
1answer
436 views

Lego / Meccano style blocks for 'serious' projects

What can be used like Lego or other construction sets, but is more serious and 'professional'? E.g. what comes with gears and screws and things like that, but is geared to serious modelling or more ...
2
votes
1answer
213 views

RC Car Hack Issue

I am trying to hack a cheap RC car as to be able to control it using my Arduino. I took apart the cars remote controller and found the pins that make it go forwards, backwards, left, and right. So I ...
2
votes
1answer
93 views

The Arduino robot tutorials describe a cord comming with the official robot, now I'm confused

I recently got the Arduino Robot and have been looking at the examples for the RobotLibrary. As I looked, I found something quite confusing (for me at least), a few of them describe connecting a ...
2
votes
1answer
2k views

control a jack/cylinder to open/close a window

I want to open the window to let the cat enter or go out, but the mecanism of the window may me think that the best way should be to use a jack/cylinder (I don't know what term is more appropriate in ...
2
votes
3answers
261 views

Can a motherboard be a simple circuit between arduino uno and a set of devices (ie: motors)

Reason for question: My son is working on a project to build a robot controlled by an arduino uno. This question is more about terminology than process, but since terms are very important at this ...
2
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2answers
19k views

avrdude: ser_open(): can't open device “\\.\COM3”? [closed]

My computer cannot detect my Arduino Uno anymore, Reset button- > L led light blinks and it turns on forever Arduino 1.6.5: Tools->Port (greyed out) I remembered that previously it wasn't like ...
2
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2answers
2k views

Stepper motor clock [closed]

I am currently using an Adafruit motor shield on my arduino uno for the first time. The idea is turning the stepper motor with basicly 1RPM. But i just cant do it. This is the first time working with ...
1
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3answers
171 views

What's in an Arduino?

I've been using an Arduino Uno Rev. 3 for a few projects and would like to switch to using a bare Atmega328 chip so I can keep everything on the same board. I've seen the Arduino on breadboard ...
1
vote
2answers
16k views

Arduino sending data over MAX485

I would like to introduce myself as a student from Czech Republic. I'm currently I'm working on a Meteostation project. I've got Arduino set up, with plenty of weather sensors, as well as WH1080 ...
1
vote
3answers
288 views

Is there an alternative to soldering to connect boards?

I know that shields are usually soldered to headers so they can be attached to the board with the Arduino. I have a tremor, which makes soldering impossible. Are there ways of connecting PCBs without ...
1
vote
3answers
7k views

My Arduino isn't showing up on my computer. What should I do?

You have your spangly new Arduino board, you've installed the software, and you plug it in. Nothing happens. Diagnosing problems may be a little tricky for the beginner, so what hoops should you go ...

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