All Questions
0
votes
0answers
4 views
Need some help with wireless tx/rx project
I am very new to this. I am trying to assist my son with a science fair project. The idea is to control a "dummy head" on basically a pan/tilt gimbal. We were able to make a headtracking unit with the ...
0
votes
0answers
7 views
Should the Adafruit MotorShield be used with the PeeWee Runt Rover?
I know this may be a beginner question but here goes.
I recently bought the PeeWee Runt Rover which comes with two DC gear-motors built in, Here's all the info I have on them.
I also bought the ...
0
votes
0answers
8 views
Random Blink leds
How can I make leds blink randomly?
I found a piece of code, but it is not working for me.
Probably something other then setPixel, but I don't know what
I am using Fast.Led library
with Arduino Nano
...
0
votes
1answer
9 views
Do I need capacitors for these LEDs?
I have 5 of these NeoPixel LED's.
For these particular LED's, they recommend "use of a 0.1 μF capacitor between + and ground".
Here's what I've got:
The blue's are 100 μF and the little brown ...
0
votes
1answer
10 views
How to get a button state change within a for loop?
I have a for loop inside my void loop() that triggers a piezo.
What I want to happen is when I press a button, it breaks the loop of the piezo, but right now, it's as if it isn't detecting the button ...
0
votes
0answers
9 views
Turning all leds on (FAST.LED)
In Fast.Led lib for arduino there is a code to turn off all leds
FastLED.clear ();
Is there also a shortcut to turn all leds ON, and with a specific color
0
votes
1answer
8 views
Code problem w/ Uno+GPS+GPRS?
I've got an Arduino Uno, SIM900 GPRS, and the Adafruit Breakout GPS.
What I am trying to do is set up GPS tracker with a connection to Ubidots to take the data(lat,long) from the GPS and send it using ...
0
votes
1answer
8 views
Can I hook up two micros to one GPS module?
I've worked with a few different GPS modules. Most of them seem to just pump out data and not really interact with the micro controller.
I have a quadcopter (Cheerson CX 20 Big Sky) It has a gps ...
0
votes
2answers
23 views
The importance of pi DC current
I am thinking about buying Arduino or Raspberry Pi. I generally know Arduino advantages (fast start-up, low consumption, ADC converters) and disadvantages (low memory, low connectivity, hard ...
0
votes
0answers
8 views
LED and LCD game? [on hold]
I am making a game where four different colored LEDs are flashing randomly, and when the green LED lights up, the user presses a button. If the user pushes the button when the LED is green, I want my ...
0
votes
0answers
5 views
Connecting mac to Adafruit Feather 32u4 Bluefruit LE over serial
The Adafruit board connects fine over usb serial, and fine over bluetooth to a mobile app, but it will not connect to mac serial monitor over bluetooth. Is there any way to use the Adafruit's ...
1
vote
2answers
19 views
How do I correctly use enum within a class?
I am trying to set the status of an object from a private enum and I'm not sure how to get the private member to the public version in the constructor, and I'm pretty sure I should not be using byte ...
0
votes
0answers
16 views
Hardware network-infrastructure for a fully-arduino-based home-automation project
As already mentioned in another question, I'm spending LOT of time planning the home-automation system for my new house (currently still in the "still building" phase).
Even if started only as a ...
0
votes
1answer
23 views
Using #define and multiple classes
I am using the FastLED library in my program and the basic usage is that the following lines go at the top of the main sketch:
#include <FastLED.h>
#define NUM_LEDS 60
#define DATA_PIN 6
You ...
0
votes
0answers
22 views
is it possible to interface two cameras with a single arduino board
I want to develop a project which has two cameras that can be controlled by Arduino,a range finder to get the distance of the objects that are captured by these cameras and the measured distance ...
1
vote
1answer
15 views
What are ideal delay times between commands for RF24 lib
Am working on a WiFi based irrigation system that utilises the RF24 lib for comms.
Have got prototype of remote sensor up and running which has a standby current of 0.036mA and transmits data every ...
0
votes
1answer
20 views
Power 4 leds with max7219 and LedControl.h
So this is my first arduino (or embedded for that matter) project. I am trying to power 4 leds with max7219. Max7219 seems easy to use, but for some reason after I upload the code, nothing happens. ...
1
vote
3answers
45 views
Options for communicating between Arduinos
I'm looking to communicate between ~5-10 Arduinos to send commands and data between them. By "Arduino" I mean the ATmega328 programmed using the Arduino programming framework.
Each of the devices ...
0
votes
1answer
28 views
Instantiating bounce library inside a class
I am trying to get my head around how to instantiate objects from existing libaries inside a class object. Specifically I am trying to get the bounce2.h debouncer working.
At the moment my code ...
0
votes
1answer
33 views
RFID detects the first card fine, but hangs on a second
I am writing a program that:
Reads string (one line) from com port
Waits for an RFID card to be present
Reads a block from the card
Here's the code (it uses this MFRC522 library, also the code is ...
1
vote
1answer
20 views
Uploading code to Arduino wirelessly
I have been working on a project watch which would work best if it is entirely sealed (to waterproof it). The watch may need future updates, but I will be unable to send code to it using a usb ...
0
votes
1answer
22 views
Running Steppers with servo
I'm doing a project which is automatic box carrier. It will hold a box from a location and move it next to it. Kind of cnc work. Locations are fixed it just has to run the orders. I want to send an ...
0
votes
0answers
24 views
Arduino PN2222 Transistor heating up a lot
I wanted to ask if this is normal and if this will damage my transistor. The transistor is connected to a dc motor and is being supplied 3.3v but when I use it, the transistor heats up and I am not ...
0
votes
0answers
25 views
Migrated - SNMP Get lag on Arduino Mega 2560 - hardware limitations or poor code?
I posted this question in the main Stack Overflow page 2 days ago, but found out this sub only later and decided I might be missing people who know the answer but visit mainly this page, that's why I ...
-1
votes
0answers
14 views
nRF24L01+ not working with 9V battery and Arduino Nano
My nRF24 module worked fine (transmission/reception) with an Arduino Nano when attached to the computer's USB cable. But when I power the nRF24 module with a 9V battery and connect it to the Arduino ...
0
votes
1answer
37 views
Controlling HDMI Switch via RS232/UART
Problem:
I have an HDMI switch that is controllable via RS232
Scenario 1:
Setup: PC connected to HDMI switch using USB -> serial adapter
Test: Opening PuTTY on COM port and sending command "sw ...
0
votes
0answers
17 views
Manually download bridge update software
My EasyVR Commander keeps showing me
"manually download bridge update software"
or
"cannot connect to the Arduino"
every time I try to connect and I have done everything I need to.
0
votes
1answer
27 views
Motor shield with 2 gear motors and one Infrared receiver
I think I have a problem with the power supply in the following circuit. I have an Arduino Uno, a motor shield (original Arduino) and a 5V Infrared receiver.
I want the robot to move forward if I ...
0
votes
1answer
18 views
Why perform bitwise operations here? (SPI FRAM read method)
See: https://github.com/arduino/Arduino/tree/master/hardware/arduino/avr/libraries/SPI/src
The following method reads and converts the input to 8 bit. I have several questions concerning its ...
0
votes
1answer
23 views
Compare the new sample in a high sampling rate datalogger
I am using sdFat library the analog bin logger example,
Github: SdFat/SdFat/examples/AnalogBinLogger/
The program is working fine and every thing but the thing is, this high speed datalogger uses ...
0
votes
2answers
30 views
Arduino and DC Motor control board
I've this PWM Module - 6V-90V 15A Pulse Width PWM DC Motor Speed Controller Switch which I use to control a peristaltic pump (ordinary DC motor), now I want to replace the potentiometer with an ...
1
vote
1answer
16 views
PC Cannot Access HC-06 Bluetooth COM Port
I have an HC-06 Bluetooth module connected to an Arduino UNO board to allow for the data received by the Ultrasonic sensor to be transferred to my PC via bluetooth and serial communication. I am using ...
0
votes
0answers
30 views
Water pressure an salinity sensor connected to arduino
I am trying to design a project that Arduino would have connected water and salinity sensor, would be packed in a special box be droped into ocean up to 500 meters. What sensors should I use and how ...
0
votes
1answer
23 views
Issues on Arduino, LiPO battery and two mottors setup
My main objective with this project was to control these two DC motors with an Arduino Nano (it is not a UNO), powered by a 3-Cell 750mAh LiPO battery (both the motors as the Arduino itself). So, I ...
0
votes
1answer
55 views
Arduino digital input fluctuates with neighbouring pins
I am using digital pins (2,3,4,5) to play midi notes on and off with 3pdt switches with pull down 10k resistor between input pin and ground.
However when I press button 2 randomly at different time ...
0
votes
0answers
7 views
Arduino and xbee series s2 two way communication
I am trying for a two way communication between 2 arduino using xbee.
i followed all the step given in below link
...
0
votes
0answers
4 views
Coding for interfacing ultrasonic HCSR 04, Ublox Neo-6M GPS and send the data using GPRS
I'm going to detect the level of solid particles using ultrasonic sensor HCSR 04 and to track its location. I preferred the Ublox Neo-6M module to find latitude, longitude, time, speed and there after ...
0
votes
2answers
50 views
How can there be not enough current?
I am new to the arduino world. I have a question regarding current that the arduino outputs over its 5v port. Why is the current in the arduino too weak for current hungry circuit when the only thing ...
3
votes
1answer
22 views
Failed to read DHT22 sensor using Intel galileo gen2 board
Why do I end up with the display
Failed to read from DHT sensor!
in the serial monitor in most cases when I run the code given below? When I reduce the delay to 1000ms the reading shows 0.00 for ...
-2
votes
0answers
26 views
Measure velocity device for liftings [on hold]
i made a encoder for lifting weights with and arduino and a rotary encoder. Now i send and receive data vía pc on parallax, but i ask if there someone interested on the hardware and make with me and ...
3
votes
1answer
30 views
Comparison of a bit vs. setting a bit
Simple question really, I just want to be sure that I understand it correctly. I understand this isn't necessarily Arduino specific.
With regards to the ATmega2560 I'm doing 3 back-to-back A/D ...
0
votes
1answer
25 views
Sizing relays for audio circuit?
Non-technical person here, so please be gentle. I moved into a place that has ceiling speakers in each room (I tried, but they don't come apart, aren't marked other than manufacturer, and that is a ...
1
vote
1answer
22 views
What does it mean in I2C, “NACK received”?
I am reading about I2C. On this site:
http://playground.arduino.cc/Main/WireLibraryDetailedReference#endTransmission
It says that endTransmission() can return one of the following status codes:
0: ...
0
votes
1answer
30 views
ESP8266 blue led stays stays on
I have found a similar qustion to mine but there was no good response.
I've connected my ESP8266 to Arduino UNO.
Then I got some trouble with software serial communication with Arduino and decided ...
0
votes
1answer
38 views
How to convert String to byte array
I have the code, it's purpose is to receive the string from a comport like:
Set@1234567890123456@1234567890123456@1234567890123456@1234567890123456
and translate it into four byte arrays byte ...
3
votes
0answers
32 views
Mysterious RX pulses on UART connect on OS X Arduino Due
Arduino IDE 1.6.8, Arduino Due, Mac OS 10.11.3
I am seeing eight mysterious pulses on the RX line when I connect to the serial port using multiple client libraries (Python, JavaScript as well as the ...
0
votes
2answers
20 views
How do I change pin assignments for the LUFA AVRISPMkII?
I just managed to get Dean Camera's LUFA AVRISP clone working on my Arduino Pro Micro, when to my dismay I found that to use PDI for my XMega, I need to have PD5 exposed for the clock source! The Pro ...
0
votes
3answers
37 views
Multiple Wireless Sensors to an Arduino
I am looking for ideas on how to connect 12 sensors to an Arduino wirelessly. The sensors will be about 10ft from the Arduino. They need to send one byte of data every 100ms-250ms to the Arduino in ...
0
votes
0answers
12 views
Is the node module for tinygs available? [on hold]
I know that the tinygps plus libaray is available for arduino ide is the same library available as a node module for intel xdk if it is available then how to install it??
0
votes
1answer
15 views
Arduino development vs nRF51 development
Originally I had an idea to develop an Arduino-compatible project using an ATmega328P, some sensors and the nRF51822 as the BLE radio. As I progressed, I realized that if I relaxed the ...
