RFID Card Interface

Some time we need a square door lock or entry for security reasons. RFID card has a unique ID with 1Kb ram. We can write or read from the memory block. Let’s look at the package that available in market- The MFRC522 is a highly integrated reader/writer IC for contactless communication at 13.56MHz. Since on […]

Graphical LCD

The TFT module is a 128*160 matrix, controlled by the onboard Sitronix ST7735 controller IC. It is a low cost faxable LCD module. TFT stands for Thin Flim Transistor which is a display screen technique used in LCD (liquid crystal display). An active component that serves as a switch for each pixel to be switched

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In this article we increase I/O port with the help of IC MCP23S17 which has 16-bit remote bidirectional I/O port with High-speed SPI interface (10 MHz). Let’s look at the Control register for addressing mode- One register (IOCON) is shared between the two ports. The PORTA registers are identical to the PORTB registers, therefore, they

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The 74HC595 device has 8bit serial in parallel out shift register that feeds directly to the 8bit D type storage register. The 8bit serial shift register has its own input clock name SH_CP. The D latch 8 bit registers use pin named ST_CP for latching the 8bit shift registers output to D latch output registers.

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12Bit ADC(MCP3208)

Sometime 10bit ADC is not enough for precious calculation. In that case we have 12bit ADC i.e. MCP3208. SPI Configuration Here B11-B0 is the 12bit ADC value. Thus the operating logic consist of MCP3208 consists of following steps- Let’s use two function one is only write and other is read-write. So the full user-defined function

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