All Questions
0
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0answers
2 views
Is it possible to connect 2 ultra sonic sensors to 1 arduino?
I am currentyly using the arduino pro micro board and i want to connect 2 ultrasonic sensors to 1 board, whilst knowing which sensor is being triggered. The sensor i am using is a HC-SR04 Ultrasonic ...
-5
votes
0answers
5 views
Celui-ci est mis en place pour faire des
Celui-ci est mis en place pour faire des aspects de défense de la peau création et en sélectionnant une prise à ces conducteurs principaux, il gère ces avantages des options offrant. dermagen iq ...
-1
votes
0answers
4 views
http://menhealthreviews.org/biocore-muscle/
Biocore Muscle Comentarios (Influencia de Apoyo y cualquier tipo de engaño?)
Casi todas las novio espera a experimentar un cuerpo general rasgado. Puede ser, sin embargo, algún tipo de proceso ...
0
votes
1answer
10 views
Creating a library
I created a simple library for formatting text output on the serial monitor. It has thee functions, one that creates carriage returns, one that sets the number of spaces between characters and the ...
0
votes
0answers
5 views
Is this a proper implementation of FreeRTOS for Arduino?
I'm using the RGBLCDShield library and a few analog input signals and since it seems the interrupts are being used by the SPI interface of the LCD Shield, I decided to try it with FreeRTOS instead. I ...
0
votes
0answers
5 views
arduino leoanrdo based h keyboard
Guys hello i just want to configure my laptops keyboard buttons a,s,d,f,g,h and j. i wrote this code and it works for only a but i couldn't configure other buttons. code is:
include "Keyboard.h"
...
0
votes
0answers
5 views
sending room temp data from multiple esp8266's to Mega 2560 to control CH gas boiler
My existing Arduino Mega set up has been in use for about 4 years controlling my gas CH system & heat pump HW system using an Arduino mega & 13 'wired' DS18B20 sensors; 2 of these sensors ...
0
votes
0answers
5 views
ATSAMD21 sleep + watchdog?
Has anyone got sleep/standby + watchdog to work together on their Arduino Zero or Sparkfun SAMD mini?
I am able to get the WDT to reset the device, and am able to put it to sleep - but can't get the ...
1
vote
2answers
25 views
Works for 2-3 hrs, then LED blinks rapidly - Sleep Mode and Watchdog timer wakeup
I hope somebody can shed some light on this problem. I've researched the internet and forums and noticed that others have experienced similar problems.
This sketch runs fine for a couple of ...
0
votes
1answer
38 views
What happens if I draw too much current from ATMEGA IO pin?
I revisited an older device that I made and discovered, that I had an 8 Ohm speaker connected directly to ground and an IO pin of an Atmega328P. According to my calculation that means that the pin ...
0
votes
0answers
9 views
Matlab to Arduino data corruption
I am trying to read 4 ADCs and send the data over a serial port to matlab where it gets plotted in real time. I am using the new simblee modules and want to set up two of them - one a wireless remote ...
1
vote
0answers
18 views
AVR dude not working in javaFX
I am working on an Project in which i have to upload hex file from java to arduino uno i wrote the code in java its working but only when i call it in main method. But when i call it when button is ...
0
votes
2answers
15 views
Arduino I/O Shield relay won't switch
I have an Arduino Uno and the I/O Shield wired up and I'm trying to switch (i.e. engage) a relay on the I/O Shield, but nothing seems to be working.
I've identified the input pins correctly and am ...
0
votes
0answers
6 views
How to bootload a atmega328-pu using arduino uno?
I have some Atmega328-Pu micro-controllers without boot-loader program. Now I need to burn boot-loader to them all. I have two arduino uno boards having Atmega328 P-Pu micro-controllers on board. I ...
0
votes
1answer
28 views
How to 'label' module using electric techniques
I am in a project where it makes set of 'modules(set of separate circuits that will work as a sensor when connected to the board' that would be connected to Arduino Mega.
Currently, I'm planning to ...
1
vote
1answer
45 views
Can an arduino tell between being powered by USB or by the jack?
I have an arduino mega that will be communicating through serial to a pc. One of the things I want it to tell the pc is whether or not it is connected to a wall power to 12V converter (where there is ...
0
votes
1answer
11 views
Power motor with Uno
I am trying to power a small peristaltic pump using an UNO R3. I have it powered using usb, and I tried running the blink program to see if I could power it using digital write, and extended the delay ...
0
votes
2answers
22 views
Sending a text message through a arduino wifi shield
I am using an Arduino uno and need to send text messages and email messages from the device based on certain events occurring. I have the logic figured out of when to send the text message or email ...
0
votes
2answers
29 views
What is VREF pin?
Was searching for some help on connecting Flir camera w/ Lepton board to arduino and found this thread
for power you can reroute the 3-5V to the VREF pin, then you have a nice clean solution.
You ...
0
votes
0answers
16 views
Using Sprintf() to left pad a string?
I've been at this all day, and I just can't seem to wrap my mind around how to use sprintf() to set a width for my string so that my characters are right justified.
What I'm trying to do is scooch ...
0
votes
0answers
13 views
Arduino IDE “Tools > Serial Port” grayed out (Ubuntu)
I know this has been asked before, but no one's solutions I've seen have worked so far. I just got started with Arduino and downloaded Arduino IDE from the Software Center. When trying to to set up my ...
0
votes
1answer
13 views
RS485 Multimaster Communication with collision avoidance
I'd like to know if there is an easy way to implement communication between multiple arduinos that avoids collisions using the RS485 module.
My setup would have multiple masters that send messages ...
0
votes
1answer
11 views
Moisture sensor data will not output data to Serial Monitor?
I am making a Soil Analysis system with an Arduino Uno, but I have run into a problem and was wondering if /r/learnprogramming could help!
The moisture sensor section of my code will not output the ...
0
votes
0answers
13 views
Embedxcode can't find my header files
I recently started using Embedxcode and tried to run a script which requires the adafruit neopixel library. However when I build it, Xcode can't find it. I have followed the Embedxcode installation ...
0
votes
1answer
17 views
Camera switch with ov7670 to output standard A/V signal - composite
I've got 3 OV7670 cameras and would like to create a switch that outputs one of the cameras video as standard A/V out (I'm not sure the correct naming).
I found docs explaining how to use the cameras ...
0
votes
1answer
20 views
Can't upload sketch to arduino Uno board
I'm trying to upload a simple sketch to my Uno board but get this error message: avrdude: stk500_recv(): programmer is not responding (full error message at the end).
I have other Uno boards who work ...
0
votes
0answers
16 views
Arduino unable to send data: TCP error
I am trying to send data colelcted from Sensors to our Server.
Protocol: TCP
Modes: Wifi (ESP8266) or GPRS (SIM 900A)
Help needed: I am able to get a IP address in both devices, it always fails with ...
0
votes
2answers
20 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 ...
0
votes
1answer
27 views
Problem with programming an Attiny85. Error message - avrdude: Yikes! Invalid device signature
I'm trying to program an Attiny85 chip using an arduino uno as an ISP following this two turtorials-
http://www.instructables.com/id/Program-an-ATtiny-with-Arduino/ &
...
0
votes
1answer
12 views
COM+ and COM- to RX and TX
I want to connect a Hokuyo scanning range finder to an ARDUINO MEGA,
the outputs are labeled like this:
COM+;
COM-;
Input;
Output;
DC12/24;
GND;
I want to read its serial output with Arduino, please ...
0
votes
0answers
17 views
Arduino to Arduino I2C audio signal
I would like to convert audio to digital and then send it over I2C to another Arduino that would convert that digital signal back to normal audio. (PWM - No amp)
Would that be even possible?
Would ...
0
votes
3answers
45 views
can homemade arduino be powered up with battery?
I am new to arduino. It is costly for me to buy an arduino uno board. Therefore I am going to make a arduino with breadboard at my home. I also want to make my arduino portable. Arduino uno boards can ...
0
votes
2answers
36 views
Interrupt numbering
I'm using an Arduino Mega and four of its interrupts. Each interrupt is only used to start/stop a timer, depending if it's rising or falling, so effectively runs the same function. Does anyone know if ...
0
votes
1answer
35 views
Why is timer0 the fastest timer in the arduino?
In the documentation, it shows that the higher frequency that can be reached with an Arduino UNO for and 8bits PWM is using timer0 with the pre-scaler set at 1. That gives a Fs of 62500 Hz, but ...
0
votes
0answers
19 views
Trying to get a dimmer switch to correspond to a servo
so, I have an arduino uno and I am trying to get a dimmer to control a servo. I am a beginner and am looking for sample code to learn from. Basically if i turn the dimmer 15 degrees, the servo will ...
0
votes
1answer
13 views
Looking for a wireless soil moisture sensor
I am new to arduino and have a basic question. I want to build a sprinkler controller system for my lawn which would detect moisture in the lawn soil and automatically starts the sprinkler controller ...
0
votes
1answer
17 views
Adafruit GPS module with SoftwareSerial affecting servo signals
I'm having a bit of an odd problem here. I'm programming a self-built quadcopter using an Arduino Uno for control. One of the sensor's that I'm using is Adafruit's GPS breakout. The motors are ...
0
votes
0answers
29 views
LED color for outdoor project
I am creating an arduino project that will display the value of a sensor in an LED array. Because the device is to be deployed outdoors, I wonder if there is a better color for the LEDs to be visible ...
0
votes
2answers
23 views
teensy as a keybooard throws error as keyboard input
I have a program (bash script) I wrote that is for stop motion animation. The script works perfectly, when I use any given keyboard on my laptop, and it works on other computers, as well. So i wanted ...
0
votes
1answer
29 views
How to use Arduino as RC Receiver
I want to use Arduino as my RC receiver. I will generate PPM signal from Arduino. Then I will send generated signal to my OpenPilot CC3D. I fetched following image from OpenPilot GCS. The diagram ...
-1
votes
0answers
17 views
Arduino quadcopter
I'm new with the quadcopter and fpv things . I built a system that runs with 2x nrf24l01 2.4Ghz radio modules,arduino. All the controllers are homemade including transmitter and receiver. I want to ...
-3
votes
1answer
45 views
Cannot use two arduino's
I have one Arduino Mega and another Uno. I need to use both of them, but it looks like they interrupt each other.
I think its a serial conflict. At the Mega one its connected a robot arm (DOBOT), ...
0
votes
2answers
16 views
How to connect phone's camera to an Arduino?
I would like to ask how to connect my phone's camera to an Arduino. Just like it is done in this this video. Does anyone familiar with this application they are using?
1
vote
0answers
27 views
Slice byte-stream into bit pieces
I receive byte data from a RS232 device with "Serial.read();". Now I need to slice this down in bit-pieces:
value1: 15bits
value2: 7bits
value3: 9bits
value4: 12bits
and so on
Data from the stream ...
0
votes
0answers
8 views
Using Adafruit GFX Font with Goldelox Serial Library on 4D System's uOLED-96-G2
It took me awhile to get this work with Arduino, but I am trying to figure out how to make the Goldelox Serial Library which I have working, take a custom font from the Adafruit_GFX library and use ...
-1
votes
2answers
103 views
Ughh… My Arduino Code ain't workin'… And i just couldn't see any problems… Any thoughts?
There's Latest Update!
So i'm workin' on a counter just for fun. How it works is when you press BUTTON1 the LED Lights up red, the buzzer beeps and the variable "counter" adds one to itself; ...
1
vote
0answers
20 views
ESP8266 not responding with CP2102 [migrated]
I connected my esp8266 with USB to TTL CP2102 as follows:
USB to TTL ESP
----------------------------------------------------
RX TX
TX RX(10K ohm resistor in between ...
0
votes
1answer
39 views
Problems With Fading Through Neopixel Colors
I have a 20x20 matrix of neopixel LED's. I have a certain set of LED's on in different places at different times. Each one is set to mainColor. Right now mainColor is just set to strip.Color(r, g, b) ...
4
votes
2answers
53 views
How is a 41KB char array filling up 256KB of program memory?
I have an array of 41,400 elements of type char, which I am trying to put in program memory on a Mega2560. It should have 256KB of flash memory, but when I try to compile my sketch, it says the size ...
0
votes
1answer
16 views
Where could I find the “Serial.find()” source code?
As written in the title, could you tell me where to find the source code of the function "Serial.find()"?
I haven' t installed the Arduino IDE, so I'm glad if you could me link a web resource, or if ...
