Arduino Stack Exchange
Arduino Stack Exchange

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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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 out with the Arduino Zero board first. What is the…
NULL
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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 is intended as a reference question.
Nick Gammon
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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, during my initial panic, I found that there…
Tom
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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 to a problem with uploading code and not blinking…
Edenia
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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 computer's USB. I have cut apart the ribbon of a…
jeffctown
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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 it does not have to execute too much operations.…
ahmadx87
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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?
lemontwist
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9
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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, can anybody tell me what kind of connector is this…
Charaf
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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 port to pin mappings both wastes time and slows me…
Ignacio Vazquez-Abrams
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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 her, why doesn't she do it using an Arduino? She…
Meenie Leis
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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 pins in the wrong hole. Are there any breadboards…
Alex K
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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 three they did not list. Capacitor? -- Looks to be a…
PGT
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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 grounds, a 5V and a 12V power in. I'm wondering what…
MicroTransactionsMatterToo
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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 control the water usage in my home and I thought to…
Juan Antonio
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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 is, what is the max voltage I can power the…
suckms
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