Questions tagged [storage]
The storage tag has no usage guidance.
106
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eMMC chip, Vcc voltage is leaking to Vccq
I'm trying to develop a device similar to exploiteer.rs' low voltage eMMC adapter, but with the form of a microSD card adapter.
Today when I was testing, I found that the eMMC chips are outputting ...
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0
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55
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Battery Maintainers
I have a bunch of non-rechargeable batteries I've kept in stock & haven't used almost at all (almost fresh off the packaging). Like all tools/equipment I have, I expect them to last me as long as ...
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1
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93
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How much should I worry about battery fires?
I have a Li-Ion battery (built into a small spot welder device)
with 5Ah capacity (and 650A short-term current drive) that I will
probably not use for the next 3 months. It's now charged to
about 50% ...
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-1
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2
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208
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Is it possible to combat SR Latch oscillation or there are better alternatives?
I need to store a bit value and then ignore any attempts to store/change it again until it's reset by another signal. So I figured the SR Latch is suited for the task. However in my project there is a ...
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Is it worth to build a discharge circuit for long storage of lithium-ion batteries?
I am making a battery powered system that might not be used for months. There will be an On-Off switch but I am planning to use a three position switch in order to discharge batteries to 3.9 V when it ...
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2
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497
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How do drives deal with user overwriting data?
Let's say I create a text file and write "Hello world!" to it. I stick with the default 4096 byte allocation size (assuming NTFS file system). I wonder what happens when I change (overwrite) ...
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514
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LED status for 2.5" SSD NVME
I'm making a PCB for the NVME SSD connector, and I want to put a status LED on it, but I didn't find much info about it.
I found a pinout, and one of the pins is called activity (P11). I thought it ...
-1
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2
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74
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Bistable memory cell with paired buffers instead of paired inverters
Bistable memory cells with paired inverters are very standard and basic building blocks (was used in Intel 8086 for example. ) But why not use paired buffers instead?
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18
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6
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2k
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How to estimate the number of components on a tape reel?
I have a partial reel of tape with components. The label says 2500 pieces. Counting the outermost layer (60 pieces) and multiplying it with the number of turns (15) gives 900 pieces. But the inner ...
- 1,018
3
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2
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Switching between SD cards connected in parallel
I got an old device that uses an SD card that's not easily accessible since it's all in an enclosed box. It only has one slot.
What I was intending to do was create a custom PCB and parallel the SD ...
user309545
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122
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How to store bits asynchronously without clock resetting all bits?
I am working on a circuit that has 8 buttons that need to hold the value once pressed.
I'm currently using a 8 bit flip flop (74LS273 in the diagram).
The problem is that all bits get reset on the ...
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13
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9
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5k
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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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1
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135
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Do energy storage systems really improve the quality of the energy?
I know that an ESS (energy storage system) improve power quality issues avoiding interruptions, controlling the voltage and the frequency, injecting reactive power into the grid thanks to the ...
0
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1
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116
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Are IC rail tubes sufficient protection for ESD-safe storage?
I've ended up with a collection of spare IC chips and am wondering what lengths I need to take to store them properly with respect to ESD.
Depending on their size they tend to come from the supplier ...
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3
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2k
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What is the difference between "Storage Temp", "Ambient Temp" and "Operating Temp" mean?
To my understanding, ambient temperature is the temperature of the surrounding area while the unit being worked on is powered. While operating temperature is the temperature of the unit itself under ...
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3
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187
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Could static electricity from trading card binder pages damage SMD components?
I bought a trading card binder to hold SMD components. I chose it because its card-sized sleeves can hold more than just tape strips and also it has a zipper. However my concern is that the clear ...
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283
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Old tvs, how did storing settings work, and what changed in the tv when we tuned a channel?
I don't have an EE background, but I would like to understand some aspects of old TVs.
When we tuned channel what exactly changed inside the tv. Was there a circuit card in the tv where something ...
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18
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4
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5k
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How do you store ICs used in hobby electronics?
I've recently started working on a project and I need to find a way to store some ICs that I'm using. I have around five different ICs and someone said I could just put them all together in a small ...
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3
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132
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What replaces SD card in industrial applications
I am using a SOM (something with Zynq 7000) that boots from an SD. While SD provides a lot of storage, i can't use it in industrial applications in a long term- it is not rated for temperature range ...
user76844
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2
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348
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Saving a voltage with ONLY analog components. Best idea?
I am challenging myself to create an analog voltage storage device.
I came up with some ideas and I would like some inputs on what is bests and maybe new ones.
Ideally, I could store a voltage in a ...
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3
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965
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Internal and external storage for a FPGA
I want to store at least 2Mbits on a FPGA. What is the normal practice for storing data on a FPGA internally?
Also, if I wanted to store 4GBytes externally, how would I go about doing this? Is it ...
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2
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821
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Is there anyway to fit a breadboard into a 1.5 inch wide space?
I am working on a model rocket and want to add electrical parts to it via a breadboard inside.
The space I have to work with is only about 40mm wide.
Is there any kind of breadboard that can fit in ...
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207
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How real an issue is static for hobbyists (Arduino etc.) for parts storage?
The parts I buy come in all kinds of packaging:
Here we have a USB charger in a basic anti-static bag, Kapton tape and MOSFETs in ESD bags and a small development board in a plain plastic bag.
I'm ...
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359
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How can I build a circuit to drive a 12V solenoid from a 3V source, so up 3V to 12V by storing in capacitors, charge and discharge cycles?
No electronics background, noob, but I want to drive a small solenoid to cycle it everytime I push a button.
I wanted to use 2 AA batteries in series as they fit the size of my project well. I will ...
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1
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385
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FAT filesytem and flash endurance
I am considering replacing a SD card in a tiny embedded system (Cortex M4 running a RTOS) by some kind of dedicated flash storage chip. However, I am worried about the chip's endurance.
The embedded ...
- 1,523
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User controlled storage devices existence
Today's memory devices have a lot of logic embedded before data is actually written onto the NAND pages.
An example could be wear levelling algorithm , FTL functionalities etc.
The typical life of a ...
- 1,013
6
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1
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1k
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What is the effect on lithium ion batteries from long term storage in sub-freezing temperatures?
I am designing an off-grid power system for a mountain cabin that is not used in the winter. The ambient temperature can get as low as -20deg F (-29deg C) during the winter. Due to snow and other ...
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2
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1
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305
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Storing solar panels in direct sun
What is the best way to store solar panels when not hooked to a charge controller in direct sun?
I was thinking about hooking each panels pos and neg mc4 connectors to itself so it will not be ...
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Capacitor Storage Circuit Having Lower Voltage Than the Simulation
I designed a circuit to store a pulse of 8 volts and duration of 40 micro seconds. When I simulated the circuit it reached 3.5 volts and discharged.The circuit and the simulation is given below;
In ...
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4
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Capacitor Selection for high voltage
I have a circuit which has about 10 kilovolts input and I want to store that voltage on a capacitor. I calculated and drew the circuit but I am now using an 18 nano farad capacitor at the end. I ...
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Charging a capacitor with a ferromagnetic generator
I am doing my internship and the company is making a ferromagnetic generator which indeed uses magnetic transition to create a flux and finally EMF. I am assigned to design a circuit which takes the ...
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2
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I've seen many conflicting answers online: For optical storage, does a pit represent a '1' bit or does a land represent a '1' bit?
I've seen many conflicting answers online so:
When reading an optical disk, which one of these is true:
A 'pit' represents 1 and a 'land' represents 0
or
A 'pit' represents 0 and a 'land' ...
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Storage of electrolytic capacitors - how long?
I have a high voltage (750V) high value electrolytic cap about as big as my forearm. It has been in my storage box for about 20 years. In general, do electrolytics degrade under normal storage ...
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Can Flash controllers make a card readonly?
It is said in this answer here that
Some of them have a controller chip that will permanently lock them to
read only if they detect a write error, as a preservation measure.
Is it possible for ...
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How to evaluate the assembly Storage temperature?
Question about the Storage Temperature after soldering in general.
If the components were all specified with, for example:
Storage Temperature Tstg : -65...+125°C;
Operating Temperature (or ...
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1
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Are anti-static bags needed for storing electronic components?
Should I keep the sensors in the anti-static bags or are the bags only needed when shipping?
As the anti-static bags are inconvenient and often too big to put the sensor into a compartment in my ...
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Possible to replace worn out NAND chips in solid state drives?
I understand that SSD endurance is typically much greater than advertised and disregarding any form of data recovery, is it possible to replace NAND chips in solid state drives (with the exact same ...
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Can I store lawnmower Li-Ion batteries in cold storage during the winter? [closed]
I purchased a Li-Ion battery powered lawnmower. I'm not entirely sure what the actual exact battery chemistry is, but I believe it is not lithium iron phosphate due to its voltage typical of non-...
- 1,563
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What is or what "fast-ramping batteries" means at this context?
I'm trying to do a economics report of Battery Storage, but I'm from Brazil, so I have to find especific words used in portuguese to describe certain things in electrical setor. I find this term "fast-...
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2
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1k
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Capacitor Storage Temperature vs Rated temperature
I have a device that contains this capacitor: https://search.murata.co.jp/Ceramy/image/img/A01X/G101/ENG/GRM21BR71H104JA01-01.pdf
The rated temperature range was listed as -55°C to 125°C. However, in ...
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Flash storage: Limited read cycles?
Comment from http://electronics.stackexchange.com/questions/356185/nand-flash-retention-using-usb-charger/356190?noredirect=1#comment855287_356190 claims that reading from flash storage is no lossless ...
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805
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NAND flash retention using USB charger?
NAND-based digital flash data storage devices such as SD,SSD,USBstick,eMMC,UFS,etc. do have transistors, where the small amount of electrical charge does slowly leak over time, resulting into data ...
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How to store a Bit?
This is page 16 from But How Do It Know?:
I don't understand this part:
If 'i' and '0' were on before's' got turned off, gate 3 had both inputs off, and gate 4 had both inputs on. When 's' goes off, ...
user175786
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1
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Is it possible to read the memory from a Holtek HT46R064B OTP(!) chip?
I am trying to get data from a Holtek HT46R064B. I know that the Chip is an OTP (One-Time Programmable) Chip. I ask myself if it is possible to read some parts of its memory.
In my case the chip is ...
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1
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Ram USB storage device [closed]
I have been searching for a storage solution that can be written to an infinite amount of times, and RAM comes up every time.
So is it possible to connect RAM to a controller and use it like a ...
user171681
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2
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692
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How did the Motorola 68000 handle instructions on 32-bit data?
The Motorola 68k, despite its 16-bit external bus, had 32-bit data and address registers, with support for .L-width instructions over four bytes -- which is 32 bits ...
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Protection from leaking capacitors - store upside down?
I collect many vintage computers. Most of them use through-hole capacitors, some axial, etc. Some also use SMD caps.
When I store my computers, I always remove any batteries.
Anyway, I was ...
- 1,190
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Solutions to store GUI elements in an embedded systems
I have a project in mind to create a GUI using a STM32F4 microcontroller. I am currently working/playing with a STM32F469I-DISCO board that embeds a MIPI Display. I understood how to display images ...
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2k
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What is this plastic chip packing material called?
When I order ICs from larger retailers, they are delivered in a plastic housing that prevents the pins from becoming bent during shipping. With a chip included, they look like this:
I would like to ...
- 1,649
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Short-term data storage in between wake cycles
I've been working on making a gardening system using an Arduino or an ESP32. To conserve energy, I will have the MCU sleep for long periods of time (I was planning on using pin-change interrupts to ...
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