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0
votes
1answer
56 views

Write operations on eMMC chip (not SPI) with data incoming from MCU

I'm working on integrating an eMMC ship to a FPGA. As for now, the initialization is working fine, I've managed to receive the CSD and CID registers properly, and I can select and move the chip to ...
0
votes
0answers
48 views

Append to .h file through arduino code [migrated]

I'm at the stage where I can #include headerFiles.h into my arduino sketches. I'm just beginning to wonder whether it's possible to append strings that are concatenated from integers which are ...
3
votes
1answer
135 views

SPI data storage devices: (micro)SD card, DataFlash, or serial EEPROM?

I am revisiting some of my design habits, and one of them is under serious scrutiny: the go-to SPI-based storage device is (micro)SD cards, for their price-to-capacity ratio and generally higher ...
0
votes
1answer
52 views

Record video from webcam w/o microcontroller [closed]

I managed to salvage a webcam from a broken laptop, and I'm looking to use it to record video in a small package to attach to a rocket. However, I need to record the video to some data medium like a ...
0
votes
1answer
94 views

Does manufacturing different sized hard drives cost the same amount? [closed]

Is there a major difference in the cost of manufacturing, say for example, a 1 TB hard drive as compared to a 250 GB hard drive? Is it the same when hard drives get even as big as 8 TB? If no, then ...
0
votes
1answer
102 views

What is the best way to store date & time in eeprom using less bit possible?

I want to save data associated to a timestamp (like a datalogger) along a month, in a very small memory (probably only 1024bytes). I was thinking using epoch time to save timestamp but it already take ...
1
vote
1answer
64 views

M48Z02 SRAM unexpected data loss

I'm using a M48Z02, a 5 V 16 Kbit ZEROPOWER SRAM. In absence of power, according to datasheet information, this device can hold data for years: A [...] package houses the M48Z02 silicon with a ...
-2
votes
3answers
91 views

Is there an IC that can shift-in, store and shift-out serial data [closed]

I want to storing serial data from an Arduino, and make it available for a second Arduino to read. Is there an IC that can receive serial data, store it, and send it out when needed? One solution ...
3
votes
1answer
331 views

How long until my eMMC is dead?

I got some feedback from our software team. Apparently we're writing twenty 4KB blocks per second. I have a 4GB eMMC. The eMMC has a max number of P/E cycle of 3000. I'm making the assumption that ...
0
votes
2answers
60 views

Using SPI Nor Flash as storage memory in Vehical tracker device

I am designing a Vehicle Tracking device. I need a storage memory of 2Mb to 8Mb to store data from MCU. Based on what my MCU supports, I am planning to use SPI NOR Flash as a storage Device. As I know ...
1
vote
2answers
89 views

Mass Storage for Embedded Applications

What are my options if I need to deal with relatively large amounts of data on an embedded processor? I've found storage around ~2-4GB with an SPI controller, but I'm thinking about something in the ...
3
votes
1answer
60 views

Finding the maximum storage of a CD from measurements of pits and lands?

Full disclosure: This is schoolwork. I'm not asking for anyone to solve this for me, I am only asking if I'm on the right track with my thinking. I have imagery of a CD from an atomic force ...
0
votes
2answers
127 views

DMM Hack to Log Amps: [closed]

I have a spare DMM (Digital MultiMeter) that I would like to use to log the displayed data at 1 sample/sec. What would be the least expensive way to mod the DMM to log the data that appears on the ...
1
vote
0answers
64 views

Crypto key handling in a uC

What are the general guidelines for handling a cryptographic keys? I know that saving them in plaintext is generally frowned upon, does this hold for true uCs where no user code is run?
-2
votes
2answers
67 views

Non-volatile storage system made up of logic gates [duplicate]

So, I don't want all my data blown away every time I turn off my system, so how would I create a storage system that doesn't use batteries but also keeps the data that I have stored?
0
votes
1answer
53 views

Can we know the limit of the number of times information can be stored/retrieved in computer chips - hard disks and RAM?

I was wondering whether the memory storage of a single memory area in computer semiconductors is limited in terms of the number of times it can be used. I'm also wondering what will happen to the data ...
3
votes
1answer
271 views

How to capture values displayed on 16x2 LCD

I have an inexpensive in-line DC Wattmeter that I often use to measure yield from Solar Panels / Modules and other energy sources with reasonable accuracy and resolution. It has a 16x2 LCD display (...
2
votes
1answer
177 views

How to store more waveform after trigger and less before?

I have a Rigol DS1074Z and can't figure out how to lower the time the scope spends pre-sampling to open up more memory for the actual data I want to see. Here is a nice image that will hopefully ...
5
votes
1answer
933 views

SD card access slows down with many files

I'm working on a data logger application using a MSP430F5529 running at 2 MHz and a SD card using FatFs. The SPI interface is already running at maximum frequency. However I am seeing very erratic ...
0
votes
1answer
94 views

What's the best storage method? [closed]

I was wondering about what's the best storage method to save files to in order to save it from natural dynamics like earthquakes, tsunamis, or just to keep them along times... We all know that there ...
-4
votes
1answer
129 views

Is it possible to store data in molecules? [closed]

Is it possible to store data in charged molecules? If so, how? If not, why not?
-1
votes
1answer
172 views

Easiest & cheapest way to use embedded filesystem on SD card [closed]

I want to build a cheap, basic project which logs data to an SD card that can be removed and read using a normal card reader in a computer. Requirements are fairly basic so performance is not ...
5
votes
2answers
248 views

Is there any possibility of dissecting a microchip to get data from its internal memory?

There are many devices that perform various cryptographic operations inside their microchips. One of their key feature is that the secret keys are stored inside of the hardware and never leave it. ...
2
votes
4answers
234 views

Data compression for large amount of binary data

In an embedded application of mine, the device generates a large amount of instrumentation data that is stored every few minutes in an NVM, such as a set of EEPROMs or a Data Flash. This data is ...
4
votes
2answers
613 views

Reliable secondary storage for Raspberry Pi (or other such single-board computers (SBCs))?

Most SD cards have a fairly limited life (as in maximum number of read-write cycles), and in spite of wear-levelling, for relatively frequent disk update applications, would probably fail in a year or ...
1
vote
3answers
634 views

Why are some mp3 players so expensive?

I have noticed that mp3 players around the 32Gb area seem to be fairly expensive; I haven't seen any for less than £150. Conversely, players with smaller storage can be found at a much lower price, ...
3
votes
6answers
219 views

Hard drive that has the ability to “read” old data while it performs a write?

Is there a hard drive (protocol command, specific model, etc.) that, while writing new data over old data, it "read"/return the old data back to the controller/OS? (Analogous to a simultaneous read-...
1
vote
1answer
170 views

Why is it that disk storage has increased exponentially over the years, while disk access times barely improved?

If you look at how much we are able to store on our disks these days, you'd be appalled to notice that the time required to access information from the disks have grown very insignificantly compared ...
2
votes
8answers
5k views

Is it possible to build homemade storage device?

From what i know, HDD is built on magnetic recording technology. My question is, is it possible to create a storage device from scratch (USB, HDD, etc.)? I'm just eager to try out building some ...