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-20%
MFRC522 RFID 13.56MHz
Original price was: ₹500.00.₹300.00Current price is: ₹300.00. inc. GST
TP4056 Li-ion 5V/1A 18650 BATTERY CHARGER
Original price was: ₹100.00.₹75.00Current price is: ₹75.00. inc. GST
MICRO SD CARD ADAPTER
Original price was: ₹250.00.₹200.00Current price is: ₹200.00. inc. GST
- Support Micro SD (<=2G), Micro SDHC cards(<=32g)
- Operating voltage: DC 2.6 V to 3.6V
- Quiescent current: 16 μA
- Support playing of 4-bit ADCPM format
- Support FAT files system SD carrier
- Recognize voice files automatically
- Support microprocessor and key control
- Audio output: 16bit DAC and PWM
- Maximum voice storage: 512 voice
- The level conversion circuit board that can interface level is 5V or 3.3V
- Communication interface is a standard SPI interface
- The power supply is 4.5V~5.54V, 3.3v
- Dimension: 4.1*2.4CM
Description
The micro SD module is also known as the Micro SD card adapter. It is a simple solution for transferring data to and from a standard SD card for dual I/O voltage. This module has an SPI interface that can be directly compatible with Arduino UNO/MEG and another microcontroller. Thus it uses 5V or 3.3v supply. The micro SD card adapter module includes two main components i.e., voltage regulator and 74LVC125A chip for logic level shifting. 74LVC125AÂ is a 3.3V CMOS quadruple bus buffer gate with 5v tolerant I/O.
The Micro SD card operates at a standard voltage of 3.3V. We cannot directly connect the circuit that uses 5V logic. Any voltage that exceeds 3.6v is passed through the ultra-low dropout register and hence convert voltage 3.3V-6V to 3.3V. 74LVC125A chip performs interface logic from 3.3V-5V to 3.3V. This level shifting helps to interact with both 3.5V and 5V microcontrollers like Arduino. These are used in various applications such as data logger, audio-video graphics, etc.
Micro SD consists of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground, VCC is the power supply, MISO, MOSI, SCK is the SPI bus, CS is the chip select signal pin; 3.3V regulator circuit: LDO regulator output 3.3V as level converter chip, Micro SD card supply.
Micro SD can be interfaced in 2 ways. SPI mode and SDIO mode. SDIO mode is faster and used in mobile phones, digital cameras, etc. SDIO Mode is more complex than SPI Mode, hence SPI mode is used in most microcontrollers.
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