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.
256 questions
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Arduino mega board 5v pin does not gives 5v when 7.5v is applied through external source
I gave 7.5v to the arduino mega board through battery. 5v pin in the board gives me the same voltage as input. Earlier it was working fine now it is giving problem.Please let me know the solution as ...
0
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1
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ESP8266 Wemos D1 Retrieving Wrong AP Mac Address
Using WiFi.BSSID and WiFi.BSSIDstr gives me some weird mac address.
the code is:
#include "ESP8266WiFi.h"
#include "ESP8266WiFiScan.h"
void setup() {
Serial.begin(115200);
//WiFi.mode(WIFI_STA);
...
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1
answer
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LEDs on Arduino WiFi Shield
I would like to know the purpose of the LEDs on top of the Arduino WiFi Shield: L9/Link/Error/Data (left in the picture). What do they indicate?
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1
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Arduino: Digitally Muti-Switch - What is the proper term for hardware?
I have recently purchased a RoboMower. Like most of the automated mowers these use electric-fence wiring to mark the borders of the property and keep a small charge on those wires so that the mower ...
- 103
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3
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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 ...
- 123
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How can Arduino know Wire.available() is true or false?
In this part of code
void readFrom(byte device, byte fromAddress, int num, byte result[]) {
Wire.beginTransmission(device);
Wire.write(fromAddress);
Wire.endTransmission();
Wire.requestFrom((...
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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?
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Do they make 2.54mm 2P Crimpable Micro JST Female connectors? [closed]
This may be a dumb question but I need some (preferably with wires already attached) and I'm unable to find any like this. Everything I find has male crimps and female surface mount. That doesn't work ...
- 103
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How can I connect a Fona to an Adafruit feather?
I have this adafruit-feather-huzzah-esp8266:
https://learn.adafruit.com/adafruit-feather-huzzah-esp8266/pinouts
and I want to connect a Fona board. But I am not certain which pins have the ...
- 902
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door protector using arduino uno and GSM sim800 module
Please check the arduino program given below and help me to find out error. The program is for following hardware. GSM 800 module Arduino Uno board Limit switch(2)
We place two limit switch at main ...
2
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1
answer
264
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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 ...
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1
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Simple reading and writing on Floppy Disk
I am trying to interface a 3.5" floppy drive (read and write data onto floppy disc). Since I need to write just few bit long number on it (16 is more than enough) I am thinking I could write it track-...
- 11
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1
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Qduino Mini bricked?
So I have been experimenting with keyboard inputs and I think I may have accidentally put a loop in my code that never actually ends the keyboard input thus not allowing me to upload any sketches to ...
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How to detect pinout at run-time
Is it possible to query the pin-out and each pin's attributes at run-time with Arduino?
If not, can it be done at compile-time?
Finally, if not, how can I incorporate this kind of information into ...
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1
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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 ...
- 53
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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 ...
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Why is my arduino acting like a radio? And is there a way to abuse this?
I am playing around with an arduino and a cheap SDR dongle and I just noticed something strange!
When I play a tune on pin 13 with just a random piece of wire connected to the pin (Using the Melody ...
- 208
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1
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323
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Arduino motor shield
I'm making a soccer car with arduino. And I have this undocumented motor control shield. So I don't know how to program it. I've tried to code it as if it be an H bridge, but is not working. Someone ...
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521
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How to attach Arduino MKR1000 to a shield meant for Arduino UNO?
I have an Arduino MKR1000 and need to interface it to an Adafruit Music Maker shield, which has pinouts for an Arduino UNO.
Maybe I'll have to attach female headers, and then jumper pins over.
Which ...
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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 ...
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1
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Is Adafruit Arduino Feather M0 WiFi compatible with Adafruit Music Maker shield?
I want Arduino to receive MP3 by WiFi (from iPhone), and then send to Music Maker codec and amplifier.
I want to use Arduino IDE and library software from Adafruit for the Music Maker, so I need an ...
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1
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Water valve for food
I am working on a project, where i need to control the flow of a liquid made from food.
For example: making chicken curry, I will separate all the liquid from the meat, and run that tough a pipe, ...
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What are the Ramps pins on my Arduino mega?
I've been working on a 3D printer and I've come to the last step, which is wiring it all up.
The 3D printer I'm making works ONLY with the Arduino Mega. No Ramps. If I need to get Ramps later, I will,...
mitch
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139
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Computer to Arduino to hardware, controlling on / off state of hardware via user input on computer
First time coding for Arduino. I'm working on code to operate an electronic valve switch. We have a laptop connected to an Arduino Mega, and that Arduino is hooked up to the valve (hardware) on Pin 53....
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0
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Serial Request error
I am working on arduino Uno board.I am trying to send request Serially from out Side using docklight.I am sending COmmand is request send every 5S to 10S and get response.When i tested this code with ...
- 467