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.

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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
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0answers
30 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
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1answer
60 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
80 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
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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
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0answers
67 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
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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
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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
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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
1answer
43 views

Over voltage on Arduino and Ardumoto

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
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1answer
18 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
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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
54 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
104 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
93 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
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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
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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
402 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
70 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
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0answers
43 views

How to replace all the arduino shields with just one [closed]

I came to know about a shield named 1shield 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, can I replicate it ...
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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
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2answers
64 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 ...
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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
88 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
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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
95 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 ...
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
32 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
130 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
93 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 ...
0
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1answer
56 views

Generating Rolling Code with Arduino for RF Switch

I am working home automation using Arduino and TX/RX module. From various sources I learned that Rolling Code based RF Switches are having better security. I have following queries How suitable it ...
0
votes
2answers
60 views

Components needed to determine position in 3 dimensions?

I'm trying to make a quadcopter using an arduino as a base. I've read on some physics involving determining pitch, yaw and roll and it seems like I'll need a gyroscope and a accelerometer. However, ...
0
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0answers
35 views

RF Receiver sniff encryption

I am trying to build a home automation system using Arduino Uno R3 and transmitter and receiver module. I will be buying a RF remote switch. RF remote switch specification says it uses pairing coding ...
0
votes
1answer
36 views

Is it possible to extend the reach of a pn532 NFC/RFID shield?

I am working off an Arduino UNO with an AdaFruit pn532 NFC/RFID shield. The goal is to have a shoe box, with a false bottom. Under that false bottom would be my prototype, which hopes to be able to ...