Tagged Questions
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.
0
votes
0answers
16 views
Custom built 16x32 (40) LED Matrix controlled by Arduino
I am planning to build a clock / thermometer / info display. I have ordered 10 pieces of 8x8 LED matrixes from ebay (http://www.ebay.co.uk/itm/331064583297).
As this is not a pre-built one I have got ...
0
votes
0answers
49 views
Unable to keep 2nd shift register in chain of 3 from “leaking”
I am working on a word clock, and I am using 3 shift regsiters (CD4094BE) and 3 darlington transistor arrays (ULN2003A) to control whether or not 21 different words are on or off. The words consist of ...
0
votes
0answers
29 views
AM2302 sensor unstable during long run
I'm using AM2302 in weather station that works continuously. After ~1-2 days sensor begins to return NaN, not readings.
I'm did some investigation and it is not firmware issue (soft reset without ...
0
votes
0answers
32 views
Arduino won't connect to Internet
I recently bought an Arduino Ethernet shield which I want to use with my Arduino Duemilanove ATmega 328. I connected my ethernet shield with my Arduino board and connect shield with my router using ...
-1
votes
0answers
14 views
Using RFM69W with Arduino Uno R3 [migrated]
I am quite new to Arduino and have been trying to build a home automation for my home.
I want to know if anyone has used RFM69W with arduino Uno R3 successfully. After browsing through the various ...
0
votes
0answers
32 views
what relay switch to use to control a 1500W 120V 12.5A heating element? [on hold]
I am trying to switch ON and OFF a 1500W camco heating element powered by a 120V GFCI outlet using an Arduino Uno (5V DC). The heating element is being used to heat upto 5 gal of water in a kettle. Is ...
0
votes
1answer
62 views
Homemade Brushless ESC
I am currently working on building a quadcopter with brushless motors. I decided to try to build the ESCs by myself with some MOSFETs. I am using an Uno as the main controller on the receiving end. ...
0
votes
1answer
36 views
Cannot get the “Output Axis” to work
I have a Virtuabotix MMA7361 Three Axis Accelerometer Module that I am trying to use to detect tilt. It works, but only for two axes at a time. It doesn't matter which way I try to flip or turn the ...
4
votes
2answers
82 views
Operating an ATmega328P-PU at 2.5V
For my job, I was tasked with creating a board to interface with a 2.5V device we've made. So, to keep things simple, I decided to interface it with an ATmega328P-PU running the Arduino firmware at ...
0
votes
0answers
9 views
Switching from Arducopter to Ardupilot [migrated]
I've been playing with my APM 2.6 and wondered, for future projects, if it's possible to write code that allows me to switch from copter to rover mode (and back) while in the field. Is this possible? ...
-8
votes
0answers
68 views
Light Seeker . . . . . . . . . . . . . . [on hold]
i need help with the following project:
For the second project you are going to make a Light Seeker.
This will work by attaching an LDR to the stepper motor.
The system must be started by the push of ...
0
votes
0answers
13 views
Can't receive message on coordinator's address
In my project I use two Xbee Serie 2, one is the coordinator and the other is a router, both implemented in API mode with the following configuration:
Coordinator
MODEM XBEE: XB24-ZB
FUNCTION SET: ...
1
vote
1answer
31 views
Read strings from ATmega or Arduino
I have found out that one can disassemble an ATmega with objdump or avrdude. And if the LB1 and LB2 bits are set low it would be much harder. So if these bits are set high or just reading the flash is ...
0
votes
0answers
58 views
Relays and Determining the State of the Relay
This is a set-up for switching our relay and determining the state of the relay. The problem is that if multiple loads (2 or more) are already connected in parallel, the load (which is a light bulb) ...
0
votes
0answers
44 views
Over voltage on Arduino and Ardumoto [migrated]
I am using Arduino Leonardo and Ardumoto to drive 2 12v motors running at 1.3 amps each.
I purchased a rechargeable battery of 12V with 5AH
I first started by plugging in the battery to the Arduino ...
0
votes
1answer
21 views
Set LB1 and LB2 low on Arduino and ATmega
I have searched for a possibility to objdump microcontrollers. I then have found this post. There it says that LB1 and LB2 can be set to low to prevent the most people to read from it.
My questions ...
1
vote
0answers
51 views
Remote control of audio equipment over RS-232 with Arduino
These questions are following on from my previous question Reverse engineering old serial devices and cloning with Arduino about the monitoring of RS-232 traffic.
I had some good success and now have ...
0
votes
1answer
55 views
Create large Arduino powered LED sign
For a project, I need to create a large display (most likely an LED matrix) that can be controlled via Arduino. Large means probably somewhere in the neighborhood of 3' by 10". I intend to use an ...
-2
votes
0answers
31 views
Prototyping Board to collect GPS data and Connect to internet using cellular network [on hold]
I am new to prototyping products like the arduino. I am working on a project and I wanna know what could be the cheapest way to implement that.
I want to collect location information from GPS and send ...
0
votes
2answers
105 views
Build variable resistor controlled by Arduino
I would like to build a variable resistor that can be controlled by Arduino. My plan is to vary resistance between the two values, i.e., 1 ohm to 10ohm, to continuously change the load for a small ...
1
vote
1answer
94 views
Writing to SD Card cheaply
So, here's the scenario:
I have an Arduino and an SD card. Unfortunately, I don't have one of the fancy shields, and I don't have the time to order one. As we know, Arduinos run on 5V, and SD cards ...
0
votes
0answers
47 views
ST7565 LCD wiring with Arduino
I have this SPI 128x64 COG LCD display which uses ST7565 for its controller. After some searching, I found that a tutorial at ladyada.net.
So with the "schema" from Digole and the information from ...
0
votes
1answer
85 views
Daisy Chaining ADC Sensors
I'm creating a grid of 200+ pressure sensors and need a clean way to get their values back to the master controller without a mess of wires.
To me it seems like daisy chaining all the sensors ...
1
vote
0answers
69 views
As a beginner, how can I learn about basic interfacing? [closed]
I have a good background in programming (C, C++, Arduino, Python, Objective-C), and am majoring in electronics engineering. We have been taught about Digital Logic, Basic Microcontrollers (8051 - ...
1
vote
4answers
404 views
How many volts can a 1 Watt 8 ohm speaker take?
I am working on an Arduino project and the sound is too low because the output pins on my Arduino UNO is only 40 mA. I can hook up an NPN transistor to amplify the sound, but I don't want to blow the ...
1
vote
2answers
53 views
Which resistor watt rating to use for this circuit and Arduino 5V?
http://www.skillbank.co.uk/arduino/measure.htm
I am looking to build the circuit this guy recommends for making a better analog reference source. I found the voltage reference diode, and now I am ...
0
votes
1answer
71 views
ATmega 328P SMD version
Currently I am using the normal ATmega328P chip with my barebone Arduino I have made.
I am planning to switch it with an SMD version of ATmega328P, since it's smaller in size it will consume less ...
0
votes
2answers
127 views
2.4 GHz versus 434 MHz transceiver for home automation
I am working on a project that uses an Arduino Uno R3 and will have one receiver and one transmitter. I'm going to use this for home automation within my home in India. I want to know which ...
0
votes
0answers
52 views
How to replace all the arduino shields with just one [closed]
I came to know about a shield named 1sheeld by which we can use our android phone as many shields like g-sensor, GSM and etc. So this product is not available in my country and how can I replicate it ...
-1
votes
0answers
45 views
gamecube controller emulated by arduino [closed]
So for a project I want to create a GameCube controller using an arduino. I have found a few websites that have the GameCube controllers protocol, but how would I go about coding the arduino to send ...
1
vote
2answers
66 views
Slow down stepper motor's speed using stepper driver DRV 8825
I've got a Nema 17, rated at 0.8Amps, stepping angle of 1.8 degrees.
The motor looks like this, and has six wires coming out of it:
The four wires I've used are the ones labeled below (I was ...
-4
votes
0answers
30 views
How to drive ten sevos with an Arduino Due board [closed]
I want to drive ten servos with an Arduino Due board. Can you guys help me with the code?
It should:
Ask to enter ten values ranging from 0-180 and 3 bits per servo.
Save the value of all ten ...
3
votes
2answers
141 views
Reverse engineering old serial devices and cloning with Arduino
I have a piece of music equipment that uses a remote control. This remote control communicates bi-directionally with the main unit. It communicates over RS-422 protocol (mainly for the cable distance, ...
0
votes
1answer
43 views
How to get 32u4 arduino to ignore DTR for USB Serial?
32u4 based "USB Serial Ports" refuse to send data to the PC unless DTR on the PC software side is set to high. If the PC software does not set DTR to true (high?), then Serial.print() on Arduino goes ...
1
vote
2answers
89 views
How to replace the rectangle(DIP) bridge rectifier with round one.
I want to make an AC dimmer and the circuit diagram from the instructables uses a bridge rectifier which is in DIP package and rectangle in shape and the rectifier which I have is round one, so how ...
0
votes
0answers
20 views
WS-RX-02 Receiver Range in Arduino
I have been preparing the receiver using WS-RX-02 receiver and arduino Uno R3 board.
My connections are as follows.
3 GND PINS on RECEIVE UNITS are Connected to GND of ARDUINO
2 VCC PINS on RECEIVER ...
-1
votes
3answers
60 views
Maximum cable length for 5V or 3.3V I2C, UART, or 1-wire signals over Ethernet and how to increase it?
I know similar questions have been asked before (Maximum cable length for 3.3V UART signals) but I would like to know the answer more specifically for a hobbyist.
I've been experimenting connecting ...
-2
votes
2answers
96 views
Does a circuit going into an Arduino pin/GND need a resistor? [closed]
If a circuit goes into an Arduino pin, even the GND pin, but does not use something a component that needs a resistor such as an LED, does it still need a resistor for the Arduino pin?
Edit: To clear ...
0
votes
3answers
130 views
Sending signals to PC over wifi
I need a microcontroller that would send statuses of it's input pins (around 5 of them, they can be 0 or 1) to a PC over wifi.
I thought of using arduino, but I don't know what would I need to make ...
0
votes
1answer
25 views
XBee Power Consumption, RX Current and TX Peak Current
I'm trying to find out the max power consumption for an XBee Series 2 2mW module so as to pick out a suitable power supply for the system. The docs state that it has a TX Peak Current of 40 mA and RX ...
1
vote
1answer
61 views
Possible to charge a LiPo battery with a 3.5mm headphone cable but also send/receive data?
If I have a device (Device A) that is plugged into a 120v wall outlet, and is connected to another device (Device B), that has a small LiPo battery, via a 3.5mm headphone cable (consider this a ...
-3
votes
0answers
27 views
0
votes
0answers
51 views
Cloning a rfid tag with arduino
My school uses RFID tags to turn on air conditioners and only professors have it. This is to prevent students leaving the air conditioners turned on. I've been thinking about cloning a tag just to ...
0
votes
0answers
33 views
Making a wifi / bluetooth Glove Controler
I want to make a glove (or something like a glove) that would send a signal to a laptop / smartphone when I touch my fingers and thumb.
I heard I could connect arduio with a wifi module, but not sure ...
0
votes
0answers
31 views
Useing RC Switch Library for Transmitter and receiver in arduino
I have a RF remote and want to replace this with Arduino using RC Switch library. I want to sniff the codes from existing remote and send using RC Switch library in arduino. Is there any tool ...
0
votes
0answers
34 views
How to create (static?) electricity? [duplicate]
First off, sorry if this isn't the right place for this, but I am hoping electrical engineering is the right direction with this..
Long story short, I have a servo motor connected to an arduino board ...
0
votes
1answer
62 views
Transistor Isn't Forming the Connection
I have wired the following diagram.
simulate this circuit – Schematic created using CircuitLab
My understanding of transistors is relatively poor, and thus I am assuming it has to do ...
1
vote
1answer
131 views
Arduino crashes switching 230V relay OFF
Here is my circuit schematic :
I need to power ON/OFF a 230VAC fan using a relay.
The relay is powered by a 5V DC power supply.
Digital pin on the Arduino board open or close the circuit in PNP as ...
1
vote
2answers
94 views
How do I control several individual LEDs with Arduino?
I am working in a book store and I have the task of making an indication of a book place in the Library Cupboard with LEDs. I need to control about 300 LEDs with Arduino. What is the optimum way to do ...
0
votes
0answers
9 views
Arduino Uno 3: Stuck at 'uploading…' sketches [migrated]
I was playing around with my Arduino Uno R3 board with Sublime Text 2 & 'Stino' as IDE
I am not sure if it is my code is the problem or if I broke something...
I pressed upload while another ...
