Questions tagged [data]
Data are values of qualitative or quantitative variables, belonging to a set of items
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What makes the stack concept useful in embedded programming?
Below is an illustration of the stack concept:
I have read many times about the stack pointer and how some variables are stored in SRAM on a stack.
Many tutorials explain how it works, but not why ...
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How much data could be stored on a standard compact cassette using modern encoding?
My father and I recently dug out his old Commodore 64 from his basement and tried to revive it. Among other accessories, we also found his old Datasette drive, which is essentially a normal tape drive ...
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Why can't Wi-Fi run at 2.4 Gbit/s?
So Wi-Fi runs in the 2.4 GHz band, yeah (and the new ones 5 GHz)? Which means that every second, a Wi-Fi antenna outputs 2.4 billion square wave pulses, right?
So I was wondering, why can't ...
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Could data transmission power consumption be lessened by transmitting more zeroes?
According to the IEA 250 TWh of power was consumed in 2019 due to data transmission globally, about 1% of worldwide electrical power use.
I would like to pose a very simple question regarding power ...
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How could you transfer data over an audio line?
I'd like to pass some data over an audio cable (i.e from audio card to my cellphone) with a short cable.
I'm looking for some ideas for algorithms for achieving this. They of course should include ...
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Data transmission protocol with two lines and no explicit clock
Are there communication protocols that transmit bits using two lines A and B as follows:
When line A is toggled, a 0 is sent.
When line B is toggled, a 1 is sent.
I currently use this to push out ...
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General protocol for data transfer from one system to another?
What is the general protocol to send information from one system to another? For example, let's say we have some information collected from microcontroller over a length of time that we want to send ...
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Best way to store very small amount of data?
I'm building a side project at the moment and I want to be able to store and retrieve a very small amount of data (10 kB tops). If the power is disconnected I want to be able to retain the data. I ...
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What is the theoretical maximum data transfer rate of a pair of wires in a phone cable?
Yesterday folks from my ISP came to install a 16 Mbps "Fiber to the Home" connection, but I noticed that the connection still comes in through the same two wires on our phone jack.
Could that same ...
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Saving data without a microcontroller?
Is there a way to save voltage data directly (without a microcontroller) to anywhere, like EEPROM, SDCARD, etc.?
For example, I am using an MPX pressure sensor which gives 0V to 5V analog output. ...
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Why don't we use 7075 aluminum Ethernet and USB cables?
Since the skin depth of copper at 1Ghz is about 2.3 micrometers, it doesn't seem like aluminum would provide a worse signal to noise ratio.
7075 aluminum is also much more resilient and stronger than ...
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Power for POV display
I want to build a small POV display, but how is the power (and if possible a communication line) transmitted to the spinning part?
I've looked at some POV project, but they usually don't explain that ...
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Can the Arduino be used to "spy" on a UART connection between two devices?
I have a need to install an Arduino (actually just the IC) into existing hardware to enhance functionality.
What I would like to do is connect the Arduino so that it "spys" on the I/O lines between ...
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Flexible-PCBs: what data is needed for manufacturers?
Can someone explain more about how you generate data for flexible or flexi-rigid PCBs for manufacture? Do I just make more layers and export more gerber files? Is there anything I need to keep in mind ...
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Is it necessary to separate DC power cables and data cables?
I have had this discussion with my colleague earlier. A DC power supply is non-alternating, so the magnetic field a DC power wire generates is constant (is it?). Now, I know the rule is to separate ...
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