All Questions
0
votes
1answer
14 views
Arduino nano getting powered through analog input?
I noticed something today. I am powering the Arduino Nano from a battery and a 5v step up converter. That works just fine and I'm getting a stable 5v output. I have a second cable coming out from the ...
0
votes
1answer
10 views
Connecting MicroSd Reader with arduino uno
I am working on a Project with
(a) Arduino Uno Clone (6 PWM Pins i.e, 3,5,6,9,10,11)
(b) 6 Servos
(c) MicroSD Reader Module
(d) Speaker
As We Know that MicroSD reader modules uses pins 10, 11, 12 of ...
0
votes
3answers
31 views
How to wire up 4-digit 7-segment display?
I have an Arduino Mega and the CL5642BH, a 4-digit 7-segment display. I found very helpful code here, but I don't understand how to wire it up on the breadboard.
The display has 12 pins: 6 on the top ...
0
votes
3answers
20 views
433MHz transmitter and receiver pair doesnt work
I have a pair of 433 MHz transmitter and receiver:
Transmitter is connected to Arduino pro mino, receiver to Arduino uno r3.
Output of receiver on serial looks like that(it doest change much):
...
0
votes
1answer
14 views
Using UART to Set RTC
I'm using an Adafruit NRF8001 Low Energy Bluetooth module and a Real Time Clock module with my Arduino board. I want to connect to the BLE module using UART to set the clock. I'll also be using UART ...
0
votes
0answers
20 views
How to make a make nice beep using a 3.3 V Arduino and a piezo disc of a 18 mm?
I was able to make only a very weak voice using Arduino + piezo disc !
Maybe I didn't use the right code?
Second , I what to understand how I can make frequency with the code?
So I could use high ...
0
votes
1answer
23 views
Serial communication with two devices
I have two devices connected to my Arduino using the SoftwareSerial library. However, it seems that they cannot communicate at the same time. I can only communiate with both by switching between which ...
0
votes
1answer
24 views
Controlling a sliding tray - beginners project
I have a small light metal platform about 30 cm square mounted on horizontal rails. It is well lubricated and slides easily from side to side. I would like to build a device to connect to the ...
0
votes
0answers
11 views
Use AS3935 with I2C?
Has someone experience with interfacing the AS3935 lightning sensor using I2C? I found a library but it only works with SPI as far as I can tell. I really don't want to give up 4 pins for SPI as I ...
0
votes
0answers
24 views
SIM800L + USB to TTL
I have:
Arduino UNO
SIM800L module
When I connect SIM800L TX pin to UNO RX, module send only 0x00. It turns out an endless loop with zeros.
Like this:
Module:
TXD -> UNO 3 PIN
RXD -> UNO 4 ...
3
votes
1answer
125 views
Low Power library messing up serial text
I noticed something unusual using the Low Power library today.
When printing text in the loop and using LowPower.powerDown(SLEEP_1S, ADC_OFF, BOD_OFF); to sleep for one second, all the text in the ...
0
votes
2answers
22 views
Increasing the numbers of I/O pins on arduino Uno
I want to make a game of tic tac toe using arduino, led and bouncy buttons . Hence I need 9 inputs and 9 outputs. But you see that arduino only has 13 I/O pins, So is there any way I can use the ...
1
vote
2answers
51 views
Use all pins As digital I/O
Increase the number of digital pins
There are many post that explain how to use more than just the standard pins on the various arduinos but none of them explain the limitations and the proplems ...
0
votes
0answers
16 views
Arduino Due DetachInterrupt not working as expected when 'nesting' interrupts
I am writing a small program on an Arduino Due to measure pulse counts from an optical encoder (1000 counts per revolution). The encoder itself outputs two channels phase shifted by 90 degrees. I want ...
0
votes
1answer
30 views
Arduino Serial.write sending more than 64 bytes
I am using an Arduino Due to collect a large amount of data from an encoder (about 1kb). Afterwards I need to send the collected data to a C# application I wrote over the serial port. I serialized ...
0
votes
0answers
7 views
Want to make an automatic cricket feeder with a TI launchpad. What's a good, reliable sensor to detect a cricket?
I'd like to make an automatic cricket feeder for my leopard gecko. My goal is essentially a box that I can load with crickets once a week or so, with a door that opens, waits for a certain number of ...
0
votes
3answers
27 views
What makes a board “Arduino Compatible”?
There are all sorts of Arduino and Arduino-compatible boards out there. They come in all form factors and they come with all sorts of different I/O. They even come with memory specs and different ...
2
votes
2answers
44 views
Wirelessly communicate between two Arduinos without router
I want to "connect" two Arduinos, without using wires. The range is ~0.2 miles (300 meters). Using Google, I saw too many options.
The idea is to build something like a beacon, so the bandwidth can ...
2
votes
2answers
69 views
Using C# Program to Interpret Keystrokes
I am in the process of developing an Arduino application that can read keystrokes from a PS/2 keyboard. I was wondering if it would be possible to upload a C# program onto the Arduino to interpret the ...
0
votes
0answers
4 views
RedBearLab Wifi Mini
I am trying to make a program using 'Energia' and RedBearLab Wifi Mini v1.0 and everytime I upload a program, even with the 'Blink' example, it resets my board and I need to manually click the RESET ...
4
votes
4answers
257 views
Arduino Uno not able to handle 2-dimensional array
Now the code I'm writing in Arduino (Using Arduino) uses multiple 2-dimensional arrays. Now when I print some thing using the Serial Monitor it prints it correctly but when I declare and initialize ...
0
votes
3answers
28 views
Can I use micros() to analyze TX23 anemometer signal?
I'm very new to Arduino, and I'm trying to read data from a LaCrosse TX23 V02(X) anemometer. It's supposed to behave like this ...
0
votes
1answer
12 views
Tried to fix ports on Mac OS X Yosemite. Now nothing works
I was having an issue very similar to this one:
Arduino compatible's serial port not showing Mac OSX
Basically I have a clone (VISduino) and it's made with a different USB chip so it needed a ...
-1
votes
0answers
32 views
Crack The Arduino Code [on hold]
Please analyze the following code and tell me what does pixels[0][0] or pixel[x][x] has,,,i couldn't crack this ,,,, and can we send HIGH or LOW to array directly without DigitalWrite() cos that ...
1
vote
0answers
22 views
How can Arduino Mega2560+Wifi Shield 2.0 (seeedstudio) receive data from database in xampp server on my pc
I'm trying to connect my Arduino Mega via wi-fi to my xampp server.
My main objective is get a value at my database and store it on a variable in Arduino code. With this new variable I'll be able to ...
0
votes
1answer
27 views
Usage of SPI inside an ISR
I learned, that SPI-code uses interrupts. So is it true then, that I can't use SPI related code inside an ISR?
Background: I want to capture one or more revolution speeds with an MCP23S17. I rewired ...
0
votes
0answers
15 views
Parsing UDP text from a Command using UDP
I want to send a parameter from my computer (i.e using hercules software) using UDP protocol to my Arduino with ethernet shield to turn 2 LED on and off (each of them).
The command i'm using is :
$A,B
...
0
votes
1answer
13 views
Arduino can't write MPU6050 data to SD card
I hope my MPU6050 sensor can write data to my SD card, it compiled OK, but to open the serial monitor I got error message:
Initializing I2C devices...
Testing device connections...
MPU6050 ...
1
vote
1answer
27 views
Can wifi shield connect to local network without internet?
I have an Arduino Uno and a Texas Instruments CC3000 WiFi shield. I need to connect the Arduino to a local network which has no Internet access so that it can send information to a computer also ...
1
vote
2answers
41 views
Run a part of code upon call
Lets say I have something that sends a command to the Arduino (for example, a PC sending through serial, Ethernet, etc). I want the Arduino to "check" what command it is and run a specific function ...
0
votes
1answer
16 views
I can upload via USB but not FTDI
I have a Adafruit Pro Trinket. I'm having issues getting GPS and and SD card working together. The trinket can be connected via USB but there is no serial connection do debugging my program is hard.
...
0
votes
2answers
48 views
How to power an Arduino Uno with 3 1.5V batteries?
I have an Arduino Uno (a SainSmart model, actually). I intend to power it with three 1.5V batteries. I measured them and they yield 4.67V in total. The Arduino requires 5V.
The question is, if the ...
0
votes
0answers
12 views
How can I add additional boards to Eclipse with the Arduino add-on with only a URL, not a zip file
I want to add the following boards:
https://redbearlab.github.io/arduino/package_redbearlab_index.json
Which I can add in the Arduino IDE by going to File -> Preferences -> Additional Boards Manager ...
1
vote
2answers
35 views
Arduino Uno Rx/Tx + Arduino Serial
I was wondering if I can use the Rx and Tx Hardware on the Arduino Uno and also add another Rx/Tx pins using SoftwareSerial at the same time ? cause I need two to communicate with two motor ...
0
votes
3answers
29 views
counting pulses from encoder on interrupt 0 pin every 50 ms
I want to calculate the number of pulses coming from motor1 encoder pin2 (Int0) as input , and motor 2 encoder pin3 (Int1), I am working now for the first motor (just for the first motor ) so I set ...
1
vote
2answers
47 views
Arduino timers. How they work
Explain this line in simple words.
TCCR0B=TCCR0B&0b11111000|0x01;
As the variuos arduinos have different chips. They also have different timers and different pins which use them.
Lately i want ...
0
votes
1answer
39 views
Reversing a motor with arduino [on hold]
Hey all we are making a project, a car that autonomously navigates through a maze. We will be using a sonar module sensor to sense at a certain distance if the car is to the wall and make it reverse ...
0
votes
2answers
29 views
Buttons for LED strip only work when held down
I am trying to make a 24 button board that assigns different methods to each button. When a button is pressed, it should interrupt the method of the previous button and begin the new method. ...
0
votes
0answers
6 views
Anyone using ModBus RTU on Galileo gen 2?
I'm trying to communicate with some industrial hardware, on ModBusRTU, from my Intel Galileo Gen2 board. I use this board to convert UART to RS485 ...
0
votes
2answers
21 views
Multiple buttons activating different methods for an LED strip
I am trying to use different buttons to activate different methods for an LED strip. However, when one button is pressed after another has been pressed, I want it to interrupt the first buttons method ...
0
votes
2answers
31 views
Fast Python to arduino communications
I've been communicating with a teensy arduino over USB using pySerial--which has been simple, but slow. With simple write commands from Python and a corresponding read command on the teensy, I can ...
0
votes
0answers
10 views
Looking for a small servo, any recommendations?
I have been scouring the internet for a servo that can fit in a watch, and work with arduino. I can not find any. The ones that I do find are micro and a good size but the control horns(teeth) are on ...
0
votes
1answer
15 views
What minimum equipment is needed to program the Freematics Vehicle Data Logger?
I was looking for a GPS/OBD2 data logger that logs data to an SD card and eventually arrived at the Arduino powered Freematics Vehicle Data Logger. It's great that it's programmable, but I have no ...
0
votes
2answers
19 views
Sending joystick data via bluetooth
Joysticks usually have two outputs, one for the x-axis and one for the y-axis. Most of the bluetooth modules I have found only have one tx line.. Is there a way to set them up to use one bluetooth ...
-1
votes
1answer
21 views
Using L239D with a joystick
Im making a small, controllable toy car. Im using the L239D motor controller to drive 2 6V DC motors, which I intend to control with a joystick. Using the L239D state table (shown below), I can make ...
0
votes
1answer
67 views
Arduino Uno vs Arduino Micro Timers -> pins
Where to find the pins relative to timers of each individual Arduino Microcontroller.
As i like Arduino's i already have various of them. The one i mostly use is the uno and micro for now.. i'm ...
0
votes
3answers
48 views
Integrating an analog signal using Arduino Due
I have an 2 analog signal, and I want to calculate the difference between 2 signals (A0 and A1), then integrate an analog, but it doesn't work (I just started studying Arduino).
Please could you show ...
0
votes
1answer
30 views
Help Connecting Arduino Uno To Computer
I am A Newbie to Arduino
I have a Windows 7 PC. Last Time I bought an Arduino Uno Clone but after working for a day, it stopped detecting on the port. So I bought a new Clone Of different brand. Now ...
1
vote
1answer
44 views
Help with LCD's menu and seeing values continuously
I want to see the voltage data using void volt();, when I go to the "Item2SubItem3" within void menuChanged. Now I can only see the data at that time: how can I refresh the value every second?
void ...
1
vote
2answers
26 views
Is it correct to use pulseIn() in ISRs?
Since it is not right to use millis() in an ISR to calculate duration of the input, Is it correct to use pulseIn()?
