Questions tagged [card]

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2answers
57 views

I built a locomotive and I want to connect a TSU-2200 sound card to it which operates on 3.7 v to 22 v. my system operates on 24 volts [duplicate]

I have built a locomotive, which operates from a 24-volt alternator through a 300 amp controller then to 6, 350-watt 24-volt motors. I have a TSU-2200 digital sound decoder that operates on a voltage ...
0
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0answers
39 views

SD Card detect, help

I have a SD card socket in a server that i can't get to work right (it wa damaged when i got it). As far as i read i need to connect CD (Card Detect) to GND if the card is inserted so i did and it ...
1
vote
2answers
74 views

MOSFET repair 4901 or 4901NF

I'm from Germany and im not so good in English, please forgive me. I have a little bit idea of electronics but I'm not so sure with this problem. I would like to say beforehand that I have a soldering ...
1
vote
0answers
171 views

Will this circuit for two Wiegand card readers allow them to talk to one control board?

I'm working on designing a PCB to allow two Wiegand HID card readers to be connected to a single control board using digital isolation IC's and wanted to make sure the IC's and other components are ...
0
votes
0answers
47 views

Can I use a WLAN mini pcie card (half or full height) in USB WiFi/WWAN slot?

I have a mini PC which has an mSATA and a USB WiFi / WWAN slot. Below is a picture with the board and its slots. I want to know if there is a possibility to install a WLAN mini pcie card (half or ...
0
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0answers
233 views

STM32 SD SPI FR_DISK_ERR

Hi I am working on STM32F103c8t6 MCU.I am trying to run sd card with spi wiht this library https://github.com/eziya/STM32_SPI_SDCARD do every thing like youtube video and my connection is like video ...
1
vote
2answers
435 views

SD card initialisation problem with Atmega32u4

I have had this issue for the last couple of days and I cannot solve it. There are many similar issues I've read through online but they have not really worked for me. This project involves a PCB and ...
12
votes
3answers
5k views

Punch a hole into a RFID card (125khz)

So I have this 125khz RFID card and I would like to punch a hole in it so I can have a thin string go through it, making my card to be able to hang from my neck. Though I have no experience in ...
0
votes
1answer
50 views

is it true that whether a POS can read an NFC card, that POS is compatible with HCE?

I was wondering if the host card emulation would produce the same result as an physical contactless card is producing.
-3
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1answer
89 views

Is it possible to move an internal SD card from a Samsung Galaxy S3 into another phone (Galaxy S2) to retrieve the information from the card? [closed]

Is it possible to move an internal SD card from a Samsung Galaxy S3 into another phone (Galaxy S2) to retrieve the information from the card, or is there any other way to access the information from ...
5
votes
4answers
2k views

Hacking musical birthday cards [closed]

I bought a musical birthday card with a small circuit in it hooked up to a piezo speaker. I took the circuit out and realize that it was ridiculously simple (from what I can see). So I was thinking if ...
0
votes
1answer
728 views

How do wiegand device really works?

As far as my understanding, wiegand device should be connected to wiegand controller so they can communicate in wiegand protocol which is 2 parity bit and the 24 data bit (the Standard wiegand 26). ...
0
votes
1answer
329 views

How to Write to SD Card at high rate? [closed]

I have just started working on interfacing Nordic semiconductor's nrf52 with SD card using SDK 12.0. I have to write to SD card at a rate of 84 packets per second and each packet consists of 20 bytes. ...
0
votes
1answer
2k views

SMD Ceramic capacitor burned [closed]

To begin with i have an AMD Sapphire Radeon R9 270 and it worked fine for a year and a half. I was doing some cleaning on my pc (cleaning the heatsinks and things like that) and when i connected ...
-2
votes
1answer
145 views

Can you tell me what is this component

I found this electronic component in the road, but I can't tell what it's tend to be because I'm not an electronics guy, can you please tell me what is it ? Thank you in advance
0
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3answers
3k views

SIM Cards are using a Microprocessor or Microcontroller?

I'm getting different answers on various websites (Wiki, Online University courses, fan pages, etc...) and can't get to decide. That would mean there are SIM with Microprocessors and some with ...
-2
votes
1answer
219 views

Make sd card WRITE/read only

I'm a noob trying to find a solution to make a sd card write/read only? Like creating files is possible but to delete something you have to format the whole card. You only can delete everything or ...
1
vote
2answers
1k views

Error initiating microSD card in SPI mode

I am trying to interface a 32 GB microSD card with PIC32MX795F512L using SPI communication. SPI communication is working fine as I have tested it by shorting the Data Input and Output line and ...
3
votes
1answer
15k views

What is the way to detect sd card insertion/removal?

I am interfacing 32GB Micro SD card with PIC32MX795F512L. I am following the examples provided in Lucio de Jasio book. In one of their example, they are using ...
2
votes
2answers
999 views

NO CD pin in SD card module by LC Studio?

I have a SD card module by LC Studio. I am interfacing it with PIC32. This module consist of 6 pins: CS MOSI MISO CLK 3v3 GND ...