All Questions
0
votes
1answer
10 views
Blink question with breadboard & LED
I tried a basic Blink example and I found a strange case where :
Works
Does not work
Can someone explain me what is happening ?
0
votes
1answer
14 views
Arduino Uno and Raspberry Pi USB Serial Communication
I am trying to get Arduino Uno with Raspberry Pi to communicate with each other. I want the python script to write a message and for my Arduino to read it. This was working before, but I came back a ...
0
votes
0answers
5 views
Converting three axis magnetometer to Degrees
I do not know if here is the best place to post this question.
I have a 9-DOF sensor (MPU 9150) and I want to use its magnetometer to retrieve the rotation angle, from 0 to 359. However, its library ...
0
votes
1answer
15 views
Are INTx pins the only ones eligible for Software Serial?
As opposed to PCINT (Atmel's Pin Change INTerrupt, INTx is arduino-compatible interupt) In other words, does Software Serial use atmel's pin change or arduino falling interrupt?
0
votes
1answer
26 views
From Arduino to a miniaturized circuit
I have a project made with Arduino, and I want to replace it by a miniaturized circuit with just a microcontroller. Is there any tutorial that can guide me in doing this? Any reference is wellcome. ...
0
votes
1answer
25 views
Message received with 1 character less
I have the following situation:
One Arduino Uno with a 433mhz transmitter wired to the laptop to have serial communication. Another Arduino Uno with a 9V battery wired with a 433mhz receiver and an ...
3
votes
1answer
18 views
What does the bootloader do?
As far as I understand it checks for a valid serial connection (new program incoming) and then either writes it to flash or starts executing the existing program.
Can't the 32u4 or EDBG fill the role ...
1
vote
0answers
10 views
SPI Interface between Arduino UNO and EVK1100
I'm using Arduino Uno board as master and AVR32UC3A0512 as slave. I've written code for arduino using SPI.h library, and Atmel Studio 6.2 using spi.h. I'm sending data from arduino to atmel i.e from ...
0
votes
2answers
40 views
How to convert frequency into db
I have made an Arduino circuit which outputs in terms of frequency(hz) and I need output in terms of db as well
So is there any formula which can I apply to convert frequency hertz to db or is there ...
0
votes
1answer
28 views
The 3.3 volts of the USB To TTL
I'm using ESP with USB to serial converter (D-SUN) is it possible to use the 3.3 volts of the USB instead of the Arduino Uno?
0
votes
0answers
11 views
Send stepper to position and back AccelStepper
At the moment I am working on a code that should send a plateau to a certain position and back. The plateau is being moved by the stepper, in my case a Nema 17 with a Polulu DRV8825 driver. Everything ...
0
votes
1answer
13 views
Sublime Text Compilation Issue
I've tried searching for this issue but came up empty. Due to the desire to use a better IDE, I installed Sublime Text 3 and Stino. I have installed the Stino package and now have the Arduino menu ...
0
votes
1answer
11 views
Reading Analog values of bluetooth module HC 05
I am working on a project which requires signal strength of a bluetooth TX and RX. what i assume is that in bluetooth module like hc05, there is an antenna receiver which reads the analog signal and ...
0
votes
1answer
4 views
Printing Serial Readings for 2+ Parallax Ping Sensors
trying print values for two sensors, one works the other is 0, any tips on how i can use more than one?
const int pingPin = 10;
const int pingPinz = 11;
unsigned int duration1, duration2, inches1, ...
0
votes
0answers
9 views
Read serial data from XV11 sensor
I am trying to read data from an XV-11 sensor using the description of the format found here https://xv11hacking.wikispaces.com/LIDAR+Sensor. This is the code I am currently using to communicate with ...
0
votes
0answers
18 views
Can one arduino module control full functional robot?
Is really to create full functional human-robot with only one brain-module arduino? Of course, there will be other additional modules as sensors and controllers. I need to know what are real ...
0
votes
1answer
9 views
TEA5767: Wire.endTransmission() hangs
I'm trying to get a TAE5767 (FM radio) to work. According to this instructable I'm trying it on a 5V-Olimexino 32u4 (Leonardo-compatible) with following code (Arduino 1.6.3):
#include <Wire.h>
...
1
vote
1answer
27 views
How to send unmodulated IR-Signal via cable?
I need to generate en (extended) NEC signal. I have connected an Arduino with a display-device via an IR cable.
Arduino --> IR-cable --> IR-input of display device
IR-cable:
One plug is ...
0
votes
2answers
22 views
MPPT using preassembled 'adjustable' buck/boost IC
This is more of a thought experiment, as I don't know if I'll have the time to work on it.
Items:
Arduino
Homebrew MPPT controller from Instructables
LM2596 Adjustable Buck Regulator
Idea:
...
0
votes
1answer
32 views
Wire over 1ft does not work with sensors SRF02
Im using an SRf02 ultrasonic sensor, and I need to make the wires long to elevate the sensor. They turn on and blink and are able to transmit a signal, yet they are not able to receive a signal. What ...
1
vote
2answers
48 views
Send AT commands to esp8266 from Arduino Uno via a SoftwareSerial port
GOAL
From Arduino UNO, send AT commands to esp8266 via a SoftwareSerial port and receive results.
CURRENT STATUS
I either send AT commands and get nothing back (wiring scheme 1) or I send AT ...
0
votes
2answers
34 views
FastLED fade WS2812B
Learning how to program with Arduino, but the learning curve is out of my league.
I have this
#include <FastLED.h>
#define NUM_LEDS 4
#define DATA_PIN 3
CRGB ...
0
votes
0answers
21 views
How to read all avaiable data from a Serial stream and then stop
I am trying to read data from the Serial port in my Arduino, store it in a buffer and when all the data has been read stop reading and then start using the data (the talkMIDI() function). The Arduino ...
0
votes
1answer
23 views
What is the correct way to wire a piezzo buzzer with a potentiometer and a button?
I'm working on a morse transmitter (kind-a), this how it looks like now:
It's working, but is it correct? My piezo buzzer is 3-24V. I use the potentiometer as a volume control. The button is for ...
1
vote
1answer
27 views
Where is the Aref pin for Attitny88
I would like to use the external analog refence voltage in an Attiny88 project I am working on that will be powered with batteries.
However, the datasheet for this processor does not show an Aref ...
3
votes
2answers
34 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 ...
-2
votes
1answer
33 views
Why won't processing not communicate with Arduino uno?
I downloaded the Processing language and ran the "Hello World" program to test it. The message appears in the Serial console but not on the Processing console. It prints "null" only. I am using the ...
-1
votes
0answers
25 views
one of the arduino ethernet gets freezes when multiple ethernet tries to connect to the server
i am using 6 arduino ethernet for making a cleaning robot. Following is my sketch of code which goes in all the ethernet.
#include <SPI.h>
#include <Ethernet.h>
#include ...
1
vote
2answers
48 views
Taking off the chip from Arduino
I just uploaded a sketch of a song to my Arduino and it works well. Could I just take the chip out and hook up speakers to it and a power source to play the song? and just get another chip and put it ...
3
votes
2answers
53 views
What is the minimum wattage of resistors for Arduino Uno?
I'd like to buy new resistors for my Arduino Uno. There are 0.25W, 0.4W, 0.6W, 1W, 2W, 3W, 5W, 10W resistors in the shop. What is the most suitable for Arduino Uno?
1
vote
2answers
123 views
Multithreading with Arduino
Well i've just started learning the concept of Multi-threading with C++ and immediately a bunch of questions came to mind about the possibility of using Multi-threading with Micro controller as a ...
0
votes
1answer
18 views
connecting RTC DS1307 to ethernet shield
What is the easiest way to mount DS1307 to ethernet shield?
I tried to do this:
https://learn.adafruit.com/ds1307-real-time-clock-breakout-board-kit/wiring-it-up
but my program just freezes when I ...
1
vote
0answers
15 views
Using a Hot Wheels Radar Gun with FreqPeriod library
I want to make a clone of those radar enforcement signs that look like this:
I bought a Hot Wheels Radar gun that can send an analog signal to determine speed. See this thread: ...
1
vote
0answers
18 views
IR sensor readings at different voltages
I am currently working on a photo-transistor like this:
...
0
votes
2answers
29 views
I would like to retrieve data from a MySQL database using PHP using HTTP requests, on my Arduino
Please help me find a way to do it.
I have looked at the following for sending data Arduino to MySql
But can't seem to find visa-versa.
1
vote
1answer
38 views
What does the 'arduino' avrdude programmer do?
The command line that my toolchain (CLion + PlatformIO) uses to program my Arduino (Uno) includes includes
avrdude ... -c arduino ...
but the documentation for this programmer simply reads
-c ...
0
votes
1answer
32 views
i'd like to make rc car and remote controller via bluetooth(HC06)
At first, I tried to make whole code for rc car and remote controller, but i realized that it's difficult for me since i have few ideas about C++. So, I changed a few things like turning on the LEDs ...
0
votes
1answer
31 views
Supply arduino through Vin pin with a battery
is it dangerous for arduino the below circuit because GND pin is common with -12V battery pole?
is it dangerous for lots of 5v circuit to be grounded on -12v battery pole?
in case i don't connect GND ...
0
votes
0answers
22 views
Arduino (or Breadboarduino) as I2C slave
I have a somewhat complex setup in which a number of sensors are queried, their results processed and then displayed. For various reasons, I don't want all of this to happen on a single 'duino. So I ...
0
votes
1answer
18 views
2 way RF with Virtual Wire / 315 / 433 MHz
I am trying to figure out how to get 2 Arduinos to talk back and forth from one another using cheap simple RF modules. I have a total of 4 RF modules (2 receiver and 2 transmitter) and 2 Arduinos. I ...
0
votes
0answers
11 views
Create a datalogger system that is able to record voice conversation from a line telephone and record the voice conversation to a pc
I would like to connect my Arduino Uno to a telephone line and a PC in order to answer a call, record a sequence of DTMF tones, generate a DTMF tone in response,record the conversation taking place ...
0
votes
2answers
27 views
Where can I get a high-quality ADC (audio digitizer) for Arduino?
Is there a high-quality (32 bit/96,000 kps) digitizer for Arduino?
Does anybody know where I can find the best options for this?
Thanks.
0
votes
0answers
56 views
How to setup a MPU 6050, L293D (H-Bridge) and 2 DC-motors to run together
Im wondering how im going to connect the L293D (H-bridge) and an MPU 6050.
Im using an Arduino UNO, 2 dc motors, MPU6050 and an L293D.
This is what i think i need to do. But im not sure if i want to ...
0
votes
2answers
20 views
Can you connect ACS712 sensor to digital input of Arduino?
I have a home automation project and am looking to use multiple current sensors (ACS712) for multiple appliances. I just need to know whether current is present or not instead of the current value. Is ...
0
votes
1answer
11 views
MG2639 & Arduino Uno not GPS-ing?
is there any way I can run an MG2639 GPS Cellular Shield (the one SparkFun makes) on an Arduino Uno for GPS tracking purposes? It seems whether I use New or AltSoftSerial, the unit just can’t read ...
1
vote
1answer
27 views
minIMU 9 and Arduino reading Gyro angle
I'm using minIMU-9 https://www.pololu.com/product/1268 and I want to read pitch, roll and yaw angles. I applied this library https://github.com/pololu/minimu-9-ahrs-arduino but there is a slope when ...
0
votes
0answers
14 views
Is hc-sr04 fast enough to make decisions on moving robot (4 jhonson motors 300 rpm)?
I am working on a project in which i have made a robot powered by 4 Johnson DC motors (300 rpm) and controlled by Arduino UNO R3. Now in my project I'd used ultrasonic sensor (hc - sr04) for detecting ...
0
votes
1answer
10 views
Script stops functioning after calling irsend() function in irlibrary!
I have the following script which checks if the user has pressed the numbers "770" or "769" continuously in the remote. The script works fine and displays all numbers. When I press the buttons "770" ...
1
vote
4answers
63 views
Low power + Logging motion detection
Scenario: I would like to monitor my closet's door as I highly suspect a family member is opening and using my items without permission. To respect privacy and also because my closet is nowhere near a ...
0
votes
1answer
18 views
glediator + PL9823 (WS2812B) + teensy = fail?
here is what I got:
teensy++ 2.0 with code below
Glediator configured for Glediator_Protocol/Single_Pixels/HL_TL/RGB/B_1000000
led matrix with the PL9823 leds (80 of them)
I first off have to set ...
