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Rajguru Electronics
Lamington Road, Mumbai, Maharashtra
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CONVERTOR BOARD

CP2102 USB TO TTL Convertor Module

CP2102 USB TO TTL Convertor Module
  • CP2102 USB TO TTL Convertor Module
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Approx. Price: Rs 200 / Piece
The CP2102 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS-232designs to USB using a minimum of components and PCB space. The CP2102 includes a USB 2.0 full-speed function controller, USB transceiver, oscillator, EEPROM, and asynchronous serial data bus (UART) with full modem control signals in a compact 5 x 5 mm MLP-28 package.The CP2102 UART interface implements all RS-232 signals, including control and handshaking signals, so existing system firmware does not need to be modified. In many existing RS-232 designs, all that is required to update the design from RS-232 to USB is to replace the RS-232 level-translator with the CP2102.

Features of CP2102
  • Included USB transceiver, without external circuit device
  • Includes a clock circuit, no external circuitry
  • Includes power-on reset circuit
  • Chip 3.3V voltage regulator output voltage
  • Supported data format is 8 data bits, 1 stop bit and parity bits
  • 3.3V and 5V dual power output
  • Weight: 4g
  • with reset signal output, etc. directly to the Arduino board Promini download
  • Supported operating systems
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I2C Logic Level Converter 4 Channel Bi- Directional Module

I2C Logic Level Converter 4 Channel Bi- Directional Module
  • I2C Logic Level Converter 4 Channel Bi- Directional Module
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The level converter is very easy to use. The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the HV' pin, low voltage (3.3V for example) to LV', and ground from the system to the GND pin.

Features:

  • Connects a 3.3V device to a 5V system
  • Steps down 5V signals to 3.3V AND steps up 3.3V to 5V simultaneously
  • This level converter also works with 2.8V and 1.8V devices.
  • Sets high and low voltages and step up and down on the same channel
  • Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side.
  • Dimensions:0.63 x 0.52″ (16.05 x 13.33mm)
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FT232RL USB TO TTL 5V 3.3V Convertor

FT232RL USB TO TTL 5V 3.3V Convertor
  • FT232RL USB TO TTL 5V 3.3V Convertor
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FT232RL USB TO TTL 5V 3.3V Convertor

The FT232RL is a USB to serial UART interface IC with the following advanced features:

  • Single chip USB to asynchronous serial data transfer interface.
  •  Entire USB protocol handled on the chip. No USB specific firmware programming required.
  •  Fully integrated 1024 bit EEPROM storing device descriptors and CBUS I/O configuration.
  •  Fully integrated USB termination resistors.
  •  Fully integrated clock generation with no external crystal required plus optional clock output selection enabling a glue-less interface to external MCU or FPGA.
  •  Data transfer rates from 300 baud to 3 Mbaud (RS422, RS485, RS232) at TTL levels.
  •  128 byte receive buffer and 256 byte transmit buffer utilising buffer smoothing technology to allow for high data throughput.

Features of FT232RL USB TO TTL 5V 3.3V Convertor

  • Material: PCB + Electronic Component
  • Support 3.3V, 5V
  • Main Color: Red
  • Chipset: FT232RL
  • USB power has over current protection, using 500MA self-restore fuse
  • RXD/TXD transceiver communication indicator
  • Pin definition: DTR,RXD,TX,VCC,CTS,GND
  • Pitch:2.54mm
  • Module Size: About 36mm(length)*17.5mm(width)
  • Interface : Mini USB

NOTE: PC Interfacing Cable is not provided with this module
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PL2303 USB To RS232 TTL Converter Adapter Module

PL2303 USB To RS232 TTL Converter Adapter Module
  • PL2303 USB To RS232 TTL Converter Adapter Module
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Approx. Price: Rs 125 / Piece(s)
Description
  • All kinds of satellites set-top box upgrade
  • Router,HDD,ADSL,broad band modem firmware upgrade or cracked upgrade
  • cellphone,XBOX360,GPS serial communication,vehicle inspection and test,DVD flash and so on
  • Burn write STC MCU,NXP MCU,renesas MCU,NEC MCU and so on
  • Simple UART communication,commonly used UART debugging tools in supper terminal
  • USB signal transferred to TTL signal,may be used by electronic enthusiasts

Features
  • Adopt imported controller PL2303HX,which can stabilize the flash with high speed
  • 500mA self recovery fuse for protection
  • Two data transmission indicator can monitor data transfer status in real time
  • Reserve 3.3V and 5V pin interface,easy for the DDWRT of different voltage system that need power
  • The entire board is coated by high quality transparent heat-shrinkable sleeve,making the PCB in insulation state from outside, so that the board won't burnt down by material short cut.
  • Electrostatic package,insures the board will not be damaged before use
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CP2102 Based USB To Serial Convertor

CP2102 Based USB To Serial Convertor
  • CP2102 Based USB To Serial Convertor
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Approx. Price: Rs 300 / Piece
Description: This is a simple to use USB to Serial Converter. It outputs RS232 level signals on the TX and the RX line. Unlike the cheap converters available in the market, which rarely work, if at all, this converter is highly reliable and can be used on all major operating systems, computers and laptops.

This converter is USB powered and needs no external power. It can provide the USB port's 5V power supply to an external circuit.You can also get TTL level RX and TX signals from the header pins on the board. The board has standard 3 mm mounting holes for easy mounting.
When connected to USB port this converter sets up a virtual serial port which can be used and interfaced just like any normal serial port. You can use this board with all our development boards to do serial communication through USB. You can also program our development boards, which support serial bootloading, through USB using this converter.

This USB to Serial converter uses the popular CP2102 IC from Silicon Labs for the USB conversion. This board can be used on all major operating systems.
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Serial Rs232 To TTL Max3232 Convertor

Serial Rs232 To TTL Max3232 Convertor
  • Serial Rs232 To TTL Max3232 Convertor
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Approx. Price: Rs 100 / Piece
Descriptions :-

A Serial RS232 to TTL converter. It converts serial Tx and Rx from RS232 to TTL voltage signals and vice-versa. You can use to interface a robot or a microcontroller with serial interface with a computer with a RS232 Port. The board needs to be powered externally with 5V during use.
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MAX485 RS-485 Module TTL to RS-485 Module

MAX485 RS-485 Module TTL to RS-485 Module
  • MAX485 RS-485 Module TTL to RS-485 Module
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Approx. Price: Rs 150 / Piece

The modules makes it simple to use with microcontroller's UART to to create bidirectional RS485 networks.

Specifications

  • On-board MAX485 chip, low-power, Slew-Rate Transceiver
  • RS485 is brought out to 5.08 (mm) pitch 2P terminal for easy wiring RS-485 communication
  • All pins can be controlled by the microcontroller
  • 120R terminating resistor on board
  • Power LED Indication
  • 2.54mm Pitch interfacing.
  • Working voltage: 5V
  • Board size: 44 (mm) x14 (mm)

Typical Connections between MCU and MAX485

MCUMAX485Details
TX-OUT-UARTDI - Data Input
RX-IN-UARTRO - Receive Output
TX_ENRE-DE combined pins called as TX_ENWhen MCU Wants to Transmit it makes TE_EN high, else LOW

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    USB to RS485 USB-485 Converter

    USB to RS485 USB-485 Converter
    • USB to RS485 USB-485 Converter
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    Approx. Price: Rs 150 / Piece(s)
    Specification:
    Dimension:6.0 x1.8x1.4cm
    Color: Black
    Support System: Windows XP , Vista, Windows 7 , Linux , MacOS , and WinCE5.0 drive
    Supports baud rate range : 75bps - 115200bps , up to 6Mbps
    Supports Plug , Play and hot-swap ( USB side) ;
    Better than using CH341D chip or similar chip to support the laptop USB port .
    Communication distance up to 1.2KM, with anti-jamming performance of industrial site ;
    Work temperature range: -40°C ~ +85°C
    Communication distance :1200m(max)

    Driver Available at following Direct download link

     

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    RS232 To RS485 Serial Converter Adapter

    RS232 To RS485 Serial Converter Adapter
    • RS232 To RS485 Serial Converter Adapter
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    Specifications:

    • Capabilities parameter
    • Interface feature: RS-232C, RS-485/422 standard interface
    • compatible with EIA,TIA
    • Electric interface:  RS-232 end DB9 hole connector, RS-485/422 end
    •  DB9 needle connector,with connection pole
    • Working mode: asynchronism Full-duplex difference transmission                      
    • Transmission media: twisted -pair or STP
    • Transmission rate: 300-115.2KBPS
    • External discharge dimension: 63mm X33mmX17mm
    • Working circumstance : - 25 to 70 degree C, relative humidity 5%  to 95%
    • Transmission distance:  1,200m (RS-485/422 end),5m(RS-232 end)

     

    Description:

    In order to carry through remote digital communication between computers with various standard series interfaces converter facilities or intelligent instruments, it needs inter exchange of standard series interface converter of compatible RS-232C and RS-485/422 standard is able to convert mono-end RS-232 signal to balance difference RS-485/422 signal and extend the communication distance to 1.2km. No external power but adopts a particular
    RS-232 charge pump to drive the system, and gains electricity without initializing the RS-232 series interface. An internal zero delay auto transceiver and particular I/O circuit automatically control the data stream direction in stead of an handshake signal (for example  RTS,DTR etc).There by in guarantees the function under RS-485/422 without changing the program compiled under RS-232 Full-duplex mode and assures the adaptation to current operation software and interface hardware. The transmission rate of 300-115.2kbps. Is capable of applying between host computers, host computer and is extensions or external equipment and forms point-to-point or point-to-multipoint remote and multi-communication network, It implements multi-machine response communication and commonly used in systems of industrial automation control all-one-card. Door safe, car parking, ATM, bus charge, eatery sell out, staff attendance management, and toll highway etc.

    Connector an signal:
    RS-232C bay-line distribution

    DB9 Female(PIN)

    RS-232C Interface Signal

    1

    Protective

    2

    RXD SIN

    3

    TXD SOUT

    4

    DTR

    5

    GND

    6

    DSR

    7

    RTS

    8

    CTS

    9

    RI

     

     

    RS-485/422 data output   connector and bay-line distribution

    DB9 Male(PIN)

    Data Output

    RS-422 Full-Duplex

    1

    T/R+

    (A+)

    2

    T/R-

    (B-)

    3

    RXD+

    (A+)

    4

    RXD-

    (B-)

    5

    GND

    Ground Wire

    6

    VCC

    +5V Standby Power input


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    PLCC32 TO DIP32 Programmer Adapter Socket

    PLCC32 TO DIP32 Programmer Adapter Socket
    • PLCC32 TO DIP32 Programmer Adapter Socket
    • PLCC32 TO DIP32 Programmer Adapter Socket
    • PLCC32 TO DIP32 Programmer Adapter Socket
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    Approx. Price: Rs 200 / Piece
    Features:
    • Model Number:PLCC 32 TO DIP 32
    • TYPE:CNV-PLCC-EP1M32
    • Support :All PLCC32 Universal Programmer
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    PLCC44 to DIP40 EZ Programmer Adapter Socket

    PLCC44 to DIP40 EZ Programmer Adapter Socket
    • PLCC44 to DIP40 EZ Programmer Adapter Socket
    • PLCC44 to DIP40 EZ Programmer Adapter Socket
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    Approx. Price: Rs 200 / Piece
    Description:
    • PLCC44 to DIP 40 chip conversion
    • EPROM : 16 bits Eprom PLCC44 chip conversion 27C1024,2048,2002,4096,4002,202,210,220,240 etc.
    • NOTE - Works with Willem and all Universal Programmers TOP, Xeltek, Labtool, EasyPRO, SmartPRO etc. The programmer has 40/44/48 pin ZIF socket.
    Technical parameters:
    • Socket: PLCC44 (1.27 mm pitch 11 x 11),
    • Bottom: 40 pin DIP
    • Weight: 50g
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    PCF8591-ADC-DAC Analog Digital Converter Module

    PCF8591-ADC-DAC Analog Digital Converter Module
    • PCF8591-ADC-DAC Analog Digital Converter Module
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    Approx. Price: Rs 250 / No

    This particular module is suitable for tutorial use and perhaps for some hobbyists. Its drawback is that its I2C address is hard-wired to all zeros. (Note that I2C is a very effective 2-wire communications standard that is used by many small semiconductor devices such as microcontrollers and sensor peripherals.) If the address lines could be jumpered high or low, then several identical modules could be placed on the same I2C lines. I would therefore recommend the alternative module named the Mini PCF8591 AD DA Shell Module because it has that capability. It is also at least three times the price.

    The IC permits only 8 bit data allowing only 256 steps in the analog output value or the digital output value. This is likely borderline for hobbyists who may want to build instrumentation or test equipment.

    My tests show another frustration: A lower than expected analog output voltage. For a 4.88 volt supply the output is only 4.17 volts (85%) at maximum value setting. Since the maximum supply voltage is 8 volts, increasing the supply to 6 volts may get a 5 volt result. I did not remove the green LED and related resistor to see if the problem was simply an excess current drain from the IC’s AOUT.

    Reference: PCF8591 8-bit A/D and D/A converter Product Specification, 2003-01-27, Philips Semiconductor.

     

    PCF8591 Module YL-40

    The module is composed of:

    • A PCF8591 IC at U1.
    • A thermistor that measures temperature at R6.
    • A photo-voltaic cell. This is a light sensitive resistor at R7.
    • A single turn trimmer potentiometer at R3.
    • Two LEDs: a red one that is on when the device has power; and a green one that increases brightness as the output voltage increases.
    • Three red jumpers that apply the voltage sources – photo-voltaic cell, thermistor, and potentiometer, and to analog input channels AIN0, AIN1, and AIN3 respectively.
    • Connector pins for I2C (SDA and SCL), Vcc, and ground.
    • Connector pins for the Analog output AOUT, and pins for each of the three analog input channels.
    • A 4-wire ribbon cable is included with sockets suitable for the connector pins.
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