0
votes
0answers
2 views
Arduino Wire.onReceive(handler)
its says in the description of the function:
Registers a function to be called when a slave device receives a transmission from a master.
So when does it exactly called? i guess its not been called ...
0
votes
1answer
13 views
SoftwareSerial with ESP8266
I am communicating with ESP8266 using SoftwareSerial of Arduino UNO. I can successfully send AT commands and get response when communicating through the terminal. But if i explicitly send particular ...
0
votes
0answers
6 views
Interfacing a Winbond W25Q32B with an Arduino Mega
I am trying to get a W25Q32B interfaced with a Mega. The problem is I don't know how to go about doing it. Can anyone guide me in the right direction. I want to read and write into the flash memory. ...
0
votes
0answers
4 views
PAN-3101 reads movements that does not exist
I have been tying to fix a problem with a PAN-3101 mouse sensor with an Arduino Uno. I can read data coming from it, but after I connect the Arduino to my PC (via USB only) the laser starts blinking ...
0
votes
0answers
7 views
NRF24L01+ can transmit but can´t receive
I have four NRF24L01+ modules. First works well as transmitter and receiver. Second and third work only as transmitters and they don´t work as receivers. Fourth doesn't work at all.
NRF24L01 is ...
1
vote
1answer
17 views
Arduino Uno and I2C
How does the arduino uno talk with i2c? i saw the circuit and it use analog input pins but as far as i know you cant use them as output. How does he send data over those pins?
1
vote
1answer
12 views
Problem with structs and pointers(?) - Mega with QueueArray
I'm writing a sketch to run on a Mega that builds up an array of timestamps (using the QueueArray library and DS3231 library). I'm having a problem where a struct I'm defining and then queueing is ...
0
votes
0answers
14 views
Integration of a camera with a robotic arm
For my project I should integrate a camera with a robotic arm that should be able to image processing and commanding to the arm to pick up a f specific thing, How can I do this project with arduino ...
0
votes
1answer
17 views
less expensive alternative arduino board to CMUcam4
Is there any similar (less expensive alternative) arduino board to CMUcam4?
CMUcam4:The CMUcam4 is a fully programmable embedded computer vision sensor. The main processor is the Parallax P8X32A ...
0
votes
0answers
7 views
fsroot size not changing after expanding to micro SD card
I followed the instructions on the YunDiskSpaceExpander and I can see that a partition has been created for the SD card but rootfs doesn't seem to have changed (when I run df -h the rootfs says it has ...
1
vote
1answer
15 views
Best way to make an Arduino switch 8 12V LED's
I'm trying to switch multiple 12V LED's with my arduino, based on the input of a (serial-in parallel-out) shift-register.
The 12V comes from a separate battery, so I can use 8 mosfets to get my 12V, ...
0
votes
1answer
19 views
Arduino uno + 12 relays
im using the basic relay and i want to active 12 like this. Each one need 50 milli amper but the arduino can supply only 300 milli amper. What can i do?
0
votes
1answer
20 views
LM35 at higher temperatures
I have a question concerning the LM35 sensor: if I'm not too concerned about accuracy (I don't mind having 2 or more degrees off), is it possible to use the LM35 sensor at higher temperatures than the ...
1
vote
1answer
32 views
How to Create a water screen with selenoid valf in arduino
I want to make a water screen. I will create character with solenoid valve. Sometimes sequential valve will pass to water, sometimes not pass.
And I will create some shape or character.
But I don't ...
0
votes
2answers
35 views
Trying to understand Arduino products
Background:
I am new to Arduino world, and I like to buy a board. I am a bit confused how Arduino products are being sold. Coming from Raspberry world, it seems that I don't know what actually ...
0
votes
0answers
12 views
Arduino motor shield vs Adafruit motor shield
What's the different between arduino motor shield and adafruit motor shield?
Can I use adafruit library on arduino motor shield?
0
votes
2answers
20 views
What is the difference between TFT and UTFT?
So I have googled this question till the 5th page of google's results. No luck
I understand what TFT stands for, that was easy to find. What I would like to know is what are the practical differences ...
0
votes
0answers
18 views
How to solve if esp8266 returns whatever is sent through arduino serial?
I am newbie here and am working on kind of WiFi-controlled Vehicle (Car or maybe Hovercraft later). My ESP8266 repeats the commands I use. For example, AT gives AT, AT+GWR gives AT+GWR, dabdabik gives ...
0
votes
0answers
24 views
Programming Arduino Uno
So I am working with an Arduino Uno to make my RC Car move. The thing is I am understanding how to call the pins to make the RC Car perform a function like moving forward or backward. The thing is it ...
0
votes
0answers
23 views
D*Lite in Arduino using Andy Brown STL
I'm having problems to implement a D*Lite in Arduino, I need to make a priority queue, when I make it in a compiler, it works, but it doesn't in Arduino.
Here is my code:
#include <iterator>
...
1
vote
3answers
19 views
Multiple shift registers, 16 bit numbers
Currently working on understanding shift registers and traing to display binary number from 65535 to 0 on a 16 LED's. Below you can see schematics I am using.
The code I am using is
int latchPin ...
0
votes
0answers
11 views
Integration of Mobile camera using Arduino UNO
I need some help,I want to to add a wireless camera on to my robotic car,and I don't want to buy the wireless camera rather I want to integrate my Android mobile camera with Arduino Uno only,so can ...
2
votes
0answers
24 views
Trouble with sleep mode and interrupts
Context
I am building a small battery powered counting device. As with many other projects like this, saving power is critical. I am therefore trying to utilise the sleep mode wherever possible. This ...
0
votes
0answers
14 views
Is there any way to import libcoap into Arduino project?
I am currently playing with libcoap (https://libcoap.net) client-server architecture. I need directions importing libcoap into Arduino project. Or any other way to implement CoAP (constrained ...
1
vote
3answers
35 views
Why can't I use an optocoupler to drive an AC circuit using the arduino digital pins?
So, when I searched for ways to drive AC circuits from Arduino, everyone suggested relays with a transistor switching circuit to channel an external 5V. I was wondering what would happen if I used an ...
0
votes
1answer
20 views
Multiple sensor connection help
How would you connect multiple HC-SRO4 ultrasonic sensors to one arduino uno? As of now, I have a bunch of jumper cables, 3 u.s sensors, and one arduino uno board. How would one hook up 3 sensors? A ...
0
votes
0answers
10 views
Getting Phone Number in GSM Shield with a library
I'm using a GSM Shield from e-Gizmo and also I use a Arduino Uno clone from e-Gizmo. Additionally, I use a library for the GSM Shield by Marco Martinez in GSMLib website.
This do work well in ...
1
vote
1answer
19 views
Using digital weighing scales with INA125p
Complete electronics beginner here. I'm attempting to build a weighing scale with an Arduino.
I'm attempting to follow this tutorial, with the shield that they use.
I've arranged my load cells on ...
0
votes
2answers
40 views
What is the best Arduino board for a Quadcopter with camera and Wifi?
I need to design a Quadcopter that contains a camera , ultrasonic sensors and Wifi connection to broadcast images in order to do image processing on a computer
1
vote
0answers
13 views
Split arduino run mode depending on active USB connection
Ok, so i have a unit that i want to add information to the EEPROM, using the USB port, such as SSID for wifi shields.
Then i want to disconnect the USB cable, plugin a battery and then it should run ...
0
votes
1answer
19 views
Does Arduino.cc sell the Ethernet Shield?
I can't find more information on the Ethernet Shield. Arduino.cc has docs about it but where do I buy it? Is Arduino.org the sole provider? I've read about the political schism between the two ...
-1
votes
0answers
25 views
Esp8266 web server not working
I have been trying to setup a server with esp8266 but results are always negative. I followed all the instruction of this page ...
1
vote
3answers
25 views
SD Card fails to initialize
I know this question has be asked before on this site. However it was never really answered. I have an Arduino Uno, I am trying to get it to read a 2GB SDHC Micro SD Card. The problem is, the SD card ...
-1
votes
0answers
20 views
Convert Arduino Code to Atmega SFR Code
What steps do I follow to convert the Arduino code to Atmega SFR code? I need to use DDRx, PORTx, PINx
Code sample follows:
#define CLK_FF_PIN 13
#define D_FF_PIN 12
#define ...
0
votes
1answer
17 views
I2C_Anything String / Char Array issues
I've been working with the lovely I2C_Anything.h (thanks to the great work and support from Nick over at http://www.gammon.com.au/forum/?id=10896&reply=9#reply9).. All working great, I was using ...
2
votes
1answer
126 views
Keyboard.print() skips keys
I'm playing with the Arduino Leonardo Keyboard.print() command, but I'm facing a annoying problem:
When I print a double quote, it will not appear and also will make to disappear the next character ...
0
votes
0answers
10 views
Arduino Pro Mini+ MPU 9150 BreakoutBoard gives unreadable symbols on Serial Monitor via Bluetooth Mate?
I am trying to read motion fusion data from MPU-9150 breakout board via bluetooth. I have set the baud rate to 38400 on the sketch uploaded on the Arduino Pro Mini.
When I am connect via USB the ...
1
vote
0answers
33 views
Arduino UNO “MEM CHECK FAIL” error
Just followed a tutorial on how to set up ESP8266 with my Arduino Uno R3. I have a serial connection and get a response of the arduino but im stuck now at chapter "first commands".
I have ...
0
votes
2answers
31 views
Shift register 1's and 0's array to 4 int's function not working
I'm not sure if i should post this here or on StackOverflow but I am coding for an LED cube controlled with 4 shift registers. I have a function in a .h file that is supposed to take an array of 1s ...
2
votes
0answers
13 views
Arduino Pro Mini lower BOD problem
I am planing to build a project where an arduino pro mini 3.3V runs on 2 aa batteries. The standard brown out detection shuts it down at about 2.7/2.8V where it could run on lower voltages too.
So I ...
1
vote
1answer
26 views
Help choosing an ESC for a 500W/60V motor
I have a 3 phase (3 wires) unicycle motor - 500W, 60V and a battery 50 - 60V (if I understand correctly - 16 cells x 3.7 V), 2.9 Ah.
I want to control this motor with Arduino PWM pin.
I understand, ...
-1
votes
0answers
14 views
Infrared sensor I2C communication (MLX90614)
I have been working on integrating an IR sensor to my arduino, and for the most part it has worked well, but I am getting intermittent errors.
Here is the datasheet for the sensor.
First I would ...
0
votes
3answers
28 views
Can I place bootloader directly onto Atmega2560 and have USB?
I am working on a prototype device which I am now on my 2nd board iteration and moving away from it being a shield and wired to an arduino mega2560 board.
I have used the freely available Arduino ...
0
votes
1answer
18 views
Arduino WIFI compiler error
Just bought an ESP8266 module to try it using my arduino uno R3. I have connected my WIFI module correctly, anyways evenb if i disconnect it, the error occur.
While trying to upload the WIFI (connect ...
0
votes
1answer
31 views
Powering Arduino with 110v and controlling relay
I've found a lot of tutorials about how to use an Arduino to control power supplies to lamps and things like that using a relay. However, I also need to power the Arduino with the same power that is ...
1
vote
4answers
33 views
Suggest some highly sensitive temperature sensor
Currently I am using DHT11 in my project, but its not very sensitive, it is quite slow in detecting temperature changes.
What sensor could I use that will be more sensitive?
0
votes
2answers
29 views
LED cube and 200 mA limitation
I'm new to electronics and have been getting rather into my Arduino. But I don't just like following an instructable to do something. I like to know the math behind it and how it works inside. Now ...
0
votes
0answers
37 views
Electromagnetic levitation
I'm a newbie to arduino and I'm attempting a project involving an electromagnet oscillating quickly causing a magnetic object to float in mid air.
I'd like to know basically if this is possible using ...
2
votes
1answer
20 views
Passing a static array to a function
I have a functon that creates a instance of KeyReport and I want to fill statically the KeyReport.keys array. I'm new in the Arduino world so I'll put a example to explain it better:
void ...
0
votes
0answers
20 views
Code for password-activated LED via Bluetooth serial
I have this pretty simple task to light up an LED for 3 seconds when I send the right password from my Android phone to the Arduino via Bluetooth. I am using an HC-05 Bluetooth Module. My LED is ...
