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Cannot retrieve data from homemade ECG

For the past couple of weeks, I have not been able to find a solution to my problem. My problem is that I cannot retrieve the data from my homemade ECG that I created from Arduino. I am a total ...

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Cannot retrieve data from ECG - Arduino

Hi StackOverflow community, For the past couple of weeks, I have not been able to find a solution to my problem. My problem is that I cannot retrieve the data from my homemade ECG that I created ...

2 answers

Pinout of the IRL7833 N-channel MOSFET?

I downloaded the datasheet for this MOSFET, but can't find where it labels the pinout anywhere. Has anyone used these before? I got them for cheap from Amazon, and I'm hoping to control some DC lights ...

1 answer

Arduino depth sensor

I'm looking for an arduino compatible depth sensor NOT for water. What I need is a sensor very similar to an Xbox kinect (but much smaller) that will tell me what is in front of the sensor and also ...

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Controlling relays through webserver with an arduino and ethernet shield but can't add more than four buttons, HTML page doesn't load

I have a software problem, I'm controlling relays through ethernet shield and arduino. I got a code from the net which works great and i can control the relays perfectly. But the problem I'm getting ...

2 answers

Arduino Digital Update Pins Instead of Write?

Im working on a fun (for me at least) project to better my skills with Arduino and C. Using an 8ch relay board and an Arduino Uno I've turned my christmas tree into a simple equalizer. The problem ...

2 answers | 8 hours ago by Front_End_Dev on Stack Overflow stackoverflow.com
1 answer

Bell Detector with Arduino

I am trying to upgrade our existing bell with my arduino to detect whether the bell is used and to mute the bell. The circuit for the bell runs with 9V AC. In order to minimize the wiring I want to ...

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Processing IDE and thingspeak interface

Hi I am new to processing programming. I am trying to integrate my arduino temperature sensor to thingspeak platform. I have written a test program to simply write the value 5 to the field 1 of ...

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vmWare fusion and socket connection

I am developing in adobe air on mac. Now I have one socket server inside Windows, called serproxy. How to connect to that socket from mac to inside vmware Windows 7 port used is 1008, not that it ...

4 answers

what is the easiest method to plot a temperature in my pc?

After a lot of learning, I'm launching a reballing business and I feel the need to have a realtime plot of the temperatures involved (ideally 3 or 4) and I have an arduino uno and a few K type ...

1 answer

Arduino and N mosfet lithium battery charging/discharging measuring capacity

I need an Arduino based lithium battery tester that uses N channel Mosfets to switch On charging from and external power source and discharging through a 2 Ohm resistor. I have no issues with either ...

1 answer

MIDI To Polyphonic Square Wave on Arduino

I've been struggling with this for a few days now, and I would really like to get on with my project. Unfortunately this is holding me up. What I am trying to do is retrieve MIDI signals sent over USB ...

1 answers | 14 hours ago by derstrom8 on Electrical Engineering electronics.stackexchange.com
3 answers

Arduino Wireless USB Cable

I am new to both arduino and electronics. Where would I start making a wireless Aduino USB cable. Which readings or websites can I go to for more information? PLease help...:) This cable should be ...

1 answer

How can electric field representation be obtained from Enge representation using Maxwell's equations?

Suppose we have a long electric capacitor. Let $L$ be its length ($z$ coordinate), $W$ its width ($y$ coordinate), and $D$ its full height (full aperture; $x$ coordinate). Let $L\gg W\gg D$. The ...

1 answer

avrdude error - stk500_paged_write() protocol error

I am using my Arduino Uno as a programmer to program my ATtiny85. I uploaded the ArduinoISP sketch to my Uno. I double checked my wiring, did some googling, but I still can't figure out why I get this ...

3 answers

How to avoid SD Card and W1500 SPI mixup on the Ethernet Shield?

In an answer Kevin Mark points to a solution/reason for the usage of the Ethernet shield together with the SD Card. The documentation says that SD Card and the Ethernet chip both share the SPI bus and ...

1 answer

mechanical relay output voltage doesn't change

As a followup to my previous question, where a 2222 npn transistor wasn't beefy enough to handle the load I was putting on it to activate a solenoid valve, I decided to try a mechanical relay board ...

1 answer

How to Run 12v 1A Electromagnet From Arduino (3v) Without External Power Supply

I have a project that I am working on that uses a micro controller to control an electromagnet that I want to run with a 3.7 volt battery. I would like to reverse the polarization on the electromagnet ...

2 answers

How does electrostatic force affect electronic devices?

How does electrostatic force generated by two seperate plates having opposite charges affect electronic devices? I know that magnetic fields have some harmful effects to electronic devices but I am ...

1 answer

How do you work out the energy requirement for a submerged pump?

I was wondering if you were to place a pump in a submerged container and then were to open a hatch allowing water to flood the previously vacant cavity how much energy would be required to discharge ...

2 answers

I touched a tree that was touching an electric fence and got an electric shock. How is this possible if wood is an insulator?

I touched a tree that was touching an electric fence and got an electric shock. How was this possible if wood is an insulator? The tree wasn't wet either, and it was a pretty strong shock too.

2 answers

Arduino 'time out' function using a millis timer

I've not been programming for long and I just want to expand from electronic engineering with an Arduino UNO board. I've started a new project based on the Secret Knock Detecting Door Lock by Steve ...

2 answers | yesterday by user2119971 on Stack Overflow stackoverflow.com
1 answer

Arduino Leonardo keyboard cmd

So i want access cmd in windows7 when button on board is pressed using arduino as keyboard const int buttonPin = 2; const int ledPin = 13; int buttonState = 0; char ctrlKey = KEY_LEFT_GUI; void ...

1 answers | yesterday by Roko on Stack Overflow stackoverflow.com
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Using an arduino board to control a atercooling loop within a pc

This is an exploratory question really (I am new to arduino / programing ) but I am curious as to weather an arduino board could be programmed with C++ to automatically control the rate of flow of the ...

2 answers

Arduino detects voltage on ground

I've been having a hard time finding a solution to this problem. I recently ordered a 5 Volt 2Amp AC to DC switching power supply from adafruit.cc When I connect my Arduino's analog sensor to the ...

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Arduino LCD Display drawing image issue

I am playing with 3,5" (400x240 chinese unknown 8-bit controller driven) TFT display which is placed into Arduino Mega 2560 R3 board. My final goal is taking .raw data from SD card and drawing it on ...

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Arduino LCD Display drawing image issue

I am playing with 3,5" (400x240 chinese unknown 8-bit controller driven) TFT display which is placed into Arduino Mega 2560 R3 board. My final goal is taking .raw data from SD card and drawing it on ...

2 answers

Does a rotating DC motor near a TV affects the signals coming in the TV?

In my TV cable the signals were quite noisy so i cut the wire and hanged both the wire parallel to each other. Then the signals became very clear and everything was going alright. Once I was ...

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How USB to Bluetooth DTR/RTS work?

A number of bluetooth Arduino shields (Bluefruit EZ-link, SparkFun Bluetooth Silver) support DTR/RTS and have special out pin to wire. How do they work? Does it require special drivers (linux f.e.)? ...

1 answer

Arduino Uno Controlling multiple LEDs with one button for different amounts of time

Thanks in advance for your help. Scenario Overview In the real world, I am using one button to open two mechanical valves, but one of those valves should close after a period of time that we will ...

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