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1 answer

Does the speed of electrons depend on energy?

I would like to know whether the speed of an electron depends on energy. If yes then in a circuit when electrons flow out of a resistor the energy decreases by a considerable amount, leading to the ...

2 answers

Arduino: Serial.readBytes() receiving wrong data after 30-60 minutes of program running

I'm writing an Arduino program that is receiving via serial and array of RGB color data (sent as bytes) that it is used to update an LED strand. My system works great for about 30-60 minutes, until I ...

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Repulsion of electric charges

If a take a vacuum tube and put electrons in it and put a negative ion strip or something like that outside the tube will the electrons inside the tube start moving due to the repelsion of like ...

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Synchron digital cameras

at the moment im doing some research. I want to create an embedded "application" with two digital cameras ( > 30fps, global shutter, >= 800x600 resolution ) on an Freescale Arm iMx. 6 Quad (i think ...

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Electricity is the movement of electrons or ions?

Electricity is the movement of electrons from one atom to another or the movement of charged negative particles (ions)?

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how to acquire arduino ethercard udp receive data?

I have a problem in accessing received udp string, I can get it by serial though. I just need to get my incoming udp data into a variable using the ethercard library in loop() function so I can use ...

3 answers

How to autoregulate a TP4056 for maximum solar power extraction

I'm using a solar panel (6V - 600mA at peak power) to charge a Li-Ion (3.7V) battery using a TP4065. The TP4065 I'm using has this configuration: Where the value of the resistor Rprog determines ...

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How to use FIFO using QUEUEARRAY in Arduino Sketch?

I getting straight to the point. Problem: what I want is to store the values receive by the arduino into a queue-array. this means i'm sending characters like f-forward l-left r-right etc. I want to ...

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Controlling AC mains using Arduino and removing control easily

I am planning to for an Arduino to read status of a switch, and accordingly switch on and off AC appliance, for a demo purpose. I want to add a feature to it of easy recovery to manual switch control. ...

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Intertask communication in multi-computer systems

I have a theoretical question regarding embedded systems and synchronization. I'm stuck on this question: What method of intertask communication is feasible in multi-computer systems? I mean ...

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Actionscript 3 and sorting incoming bytes from an arduino

im new to using action script so i apologies if this wont make sense, the issue iam having is that the incoming bytes from my arduino are not being stored properly in an array. The bytes come in one ...

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Multiple nrf24l01, shared power, ripple/interference, DSO screenshot provided

I've got this circuit with 3x atmega328 & nrf24l01+ running off shared power supply, either 2x AA battery or 3v3 reg. It acts as a repeater, and depending on the origin of the message and the ...

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Running Labview VI/app/exe on an embedded board

I want to run my LabVIEW app on an embedded board but apparently LabVIEW is only supported by x86 Architecture. Is that even possible? If yes then can anybody recommend me an embedded board with a ...

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Fesibility of using “computer RAM” with a microcontroller project

How feasible is it that I could connect the pins of some garden variety "computer RAM" to a microcontroller for use as external RAM? Is there specific hardware used on computer motherboards that help ...

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Why do grapes in a microwave oven produce plasma?

Some of you may know this experience (Grape + Microwave oven = Plasma video link): take a grape that you almost split in two parts, letting just a tiny piece of skin making a link between each ...

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Why can't I get signal from my XBee through an Arduino Uno with RX/TX connected?

I've watched the XBee tutorials of user "tunnelsup" on YouTube and tried to follow his steps. Basically, I want to get an digital signal sent from a remote XBee (let me call it XBee A) and received by ...

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Why is voltage added when batteries are connected in series but not in parallel?

As I understand, the different voltage between two object is caused by the total different charged between two object. Thus, the higher extra electron between two opposite charged object, the higher ...

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How to keep the signals at the pins on a Arduino upon software restart

I have a Arduino board, connected to a relay. When the digital pin on the board is set to HIGH, the relay closes. If the digital pin is LOW, the relay opens. Now that from time to time, I will have ...

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Arduino Bluetooth Module not holding connection

I am using an HC_05 Bluetooth module and an Arduino Uno to try and set up a simple bluetooth connection with my Windows Phone (HTC 8X). I am following the online tutorial here. When I go into ...

3 answers

Arduino NFC door unlock

I am trying to use an arduino board with NFC shield to be able to unlock the door of my car. Board: Arduino UNO Rev 3 NFC Shield: v2.0b by Seeed Studio So when a NFC tag is present a signal turns a ...

3 answers | 16 hours ago by user3599457 on Stack Overflow stackoverflow.com
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Converting a String from Byte array to int

I've been googling all night for this problem since it is my first time to use arduino and android. My question is, how can I convert the variable data *String to int? I've been getting ...

2 answers | 17 hours ago by Rosselle on Stack Overflow stackoverflow.com
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How to select accelerometer and gyroscope range for precision tracking?

i'm working on a tracking systeme to track a person inside a building i'm using for that an MPU6050 , i need to know what range should i use in this situation for both accelerometer and gyroscope ...

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ARDUINO ANCS AND U8GLIB

So I have a problem with compiling code. I have ants_led code for nrf8001 breakoutboard which can be found on github and when I include u8glib.h library it shows me this error: In file included ...

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Arduino read get values after ? in url with ethernet shield

Sorry if it has been asked before but I cannot find anything on the internet. I just want to host a page in arduino ethernet shield and when I visit it from a browser with Get parameters (e.g ...

1 answers | 20 hours ago by Chris Mitsis on Stack Overflow stackoverflow.com
3 answers

Interfacing Arduino with MATLAB for image processing

How can I connect an Arduino board and MATLAB for image processing? I am making an autonomous robot which require image processing in MATLAB.

3 answers | 23 hours ago by Neel Modi on Stack Overflow stackoverflow.com
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Memory addressing in eMMCs

I'm working for the first time on eMMCs and there's something not completely clear to me in their addressing system [explained in section 5.2 of JEDEC 5.0 standard] JEDEC says that, depending on the ...

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RSMB does not acknowledge publish message with MQTT-SN

I am running Really Small Message Broker (RSMB) 1.3.0.2 with support for MQTT-SN. I have a Arduino client talking to it via MQTT-SN protocol. Arduino is a sleeping client - battery operated device. ...

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Can I make a bridge between GSM Arduino shield with a Raspberry Pi?

I am trying to do some work with Raspberry Pi, however, I have GSM Arduino shield laying at home. I want to give a voice-call using it. However, I still wondering how can I interface voice/mic, ...

2 answers

iRobot Create 2 and Open Interface 2 Spec not syncing up with incoming data

I have the create 2 and have it hooked up to an arduino. Almost all the commands work fine except when retrieving sensor information. If i send a request for packet 18 I get back values that while ...

2 answers

HC-06 bluetooth module

good evening I need help with the blinking LED of my HC-06 bluetooth module I just want to know what it means when it starts blinking, when it's always on and when it's not on at all and how do I ...

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