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Unlike the venerable HD44780 based character LCD, graphic LCDs do not have any ad-hoc standard. Small graphic LCDs come in many different flavors, configurations and sizes. Some have on-board dedicated graphic controller chips and some do not. All graphic LCDs require a negative voltage to drive the displays contrast. The amount varies with the physical size of the display. Usually, 240x64, and less, require -10v, 256x128 need -15v and larger displays may require up to -24v. To further complicate matters, this required negative voltage is usually not provided by the LCD itself. This means additional circuitry. To drive an LCD without an on-board graphic controller with an 8 bit micro would be daunting, indeed, and is beyond the scope of the Workbench boards. All of the COMPSys Workbench development boards rely on LCDs with controllers. This usually requires 12-16 pins of the micro, and leaves the rest of the micro’s pins for the user to implement for other uses such as I/O, analog readings, buttons, keypads etc. Some graphic LCDs even have a serial interface requiring only a handful of connections. Three of the popular controllers for small size displays are the Seiko-Epson SED1330, Samsung KS0108 (akin to the Hitachi HD61202), and the Toshiba T6963C. Most of the LCDs that use these controllers have an 8 bit data bus along with 4 to 6 control lines. The Workbench controllers are configured to work with most of the above controllers. Since pin arrangements vary from one manufacturer to another, adapters become a necessity. All of the LCDs mentioned here a 1 bit color displays (black/white) and are not capable of grayscale shades.
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GLI2 - The new GL series 20Mhz controller board. Same compact size as the original GLI board but has an on-board -15v power supply to drive LCD panels up to 256x128 in size. Low cost adapters available for most of the popular graphic controller LCD displays, such as the SED1330, T6963C, KS0108, and the HD61202. Uses a PIC16F877 mcu, Max232 serial transceiver, 24LC256 I2C eeprom, a Max637 voltage booster and an LM7805 voltage regulator. The controller’s PORTA and PORTB pins are available for other uses and are brought to pin outs for easy connections. Requires 7-20v DC power supply.
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- On board serial I/O via a DB9 connector CTS/RTS lines can be used for hardware handshaking
- 5 different LCD adapters to choose from..with more in development
- On-Board 32kb eerpom storage for images.
- Built-in negative voltage supply to drive LCD panels
- Can be programmed serially with a bootloader.
- 5 volt regulator
- Can be used with the new PIC18F452 controller for added programming space.
- With minor chanages in pin assignments it can run the same firmware as the original GLiPIC board.
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The kit requires soldering a few surface mount components.
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Click here for more info about the board and the adapters as well as how to order.
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GLI2 Controller is supplied with one LCD adapter (5 adapters to choose from) Requires assembly
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A small development kit which connects to an Optrex 51320 COG (chip on glass) graphic LCD. The dot matrix LCD has an LED backlight (5v). The board includes a 28 pin DIP PIC16F876 with 8k code space (many other 28 pin PICs can be used if more programming space is required). There is an on-board 5v power regulator as well as an RS232 IC (Max232 or equiv). It also has provisions for an optional I2C eeeprom and pull up resistors. Unused pins, such as PortA, are available via pin headers. The PIC’s programming pins are brought to a header so that the PIC can be programmed using a conventional PIC programmer. An alternative, method is to load the PIC with a bootloader and then program it via the board’s serial DB9 connector. Sample PICBasicPro code is available in the Workbench Support section. The kit is available with or without the LCD.
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COG30LCDK (kit requires soldering)
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A small (1.25"x2.5") LCD interface development board specifically designed for T6963C based LCD's with 2x10 headers for LCDs such as the Optrex DMF5005, Sharp LM24014, Solomon LM6270, Sanyo DG0572 etc. This board makes it very easy for developers to experiment with graphic LCDs since it can mount directly to the LCD via its 2x10 female header. The board includes a PIC microcontroller, an RS232 interface IC, a 256kb Eeprom for storage and a -15v variable negative voltage supply for the LCD's display panel. It alsoincludes a 5v regulator.Soldering required. More info...
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MMC/SD and DataFlash development boards
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MMSD3F Kit
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Board using a PIC16F876, an eeprom, and a MAX233. Standard DIP sockets. PCB Model MMC3B can use either an 8 pin DIP or a SOP-8 for the eeprom, making it possible to use FRAMs such as the FR24CL64 3.3v I2C memory from Ramtron, Inc.On the right MMSD3F kit for SD as well as MMC cards.Requires assembly
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Source code written in PBP V2.47 available. This allows one to read/write to a single file on a FAT16 formatted MMC.
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Ideal for long term data logging by providing large storage space.
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Similar to the MMSD3 board but much more compact. It is a PIC based 3.3v development board that is interfaced to a SD/MMC socket. Serial I/O is available via a standard DB8F RS232 connector. The PIC can be loaded with a bootloader so that it can be programmed serially without having to remove it from the board. It also includes a 5 pin header for programming the PIC with a conventional programmer. The SPI lines from the MMC/SD are connected to the hardware SPI pins on the 16F876 / 18F252 PIC as are the serial RS232 lines. It includes a Ramtron 64kbit FRAM, a Max3232 (or equiv.), SD/MMC socket, a 3.3v LDO regulator, a PIC 16F876 or 18F252 and associated passive components.Requires a 7-16v DC supply. PICBasicPro demo code available. PIC program for a ‘single file’ system on a FAT16 formatted card also available, which allows the card to be read on a Windows PC card reader. Works with SD as well as MMC cards. Ideal for long term data logging, where the data is received at a slow I/O rate. Requires assembly
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SDMM3F
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A232DTE 3.3v TTL to RS232 adapter configured as a DTE adapter with a male DB9 connector. It comes as assembled or as a kit. It will work on 3.3v to 5v.
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A232DBL 3.3v or 5v Dual TTL to RS232 adapter board. Designed for engineers/hobbyists who need an adapter without a DB9 connector so that they can wire their own. The board provides two separate TTL to RS232 I/O channels, each has Tx and Rx lines. The adapter is available as a kit or assembled....more info.
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AD233_12V An RS232 adapter with an on-board voltage regulator, protection diode and an LED indicator. The adapter can be configured with or without CTS/RTS handshake lines. It will run off a 7 to 14 vdc power supply and provides a -10v to +10v RS232 line signal.More info...
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Rayson BTM-182 Bluetooth RS232 module carrier board for 3.3v and 5v projects. The carrier boards provide TTL serial I/O lines (Tx,Rx,CTS and RTS) and can serially communicate with most Class 2 Bluetooth devices. More info.....
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The UFT232R A USB to TTL RS232 kit. it is based on the new FT232R chip by FTDI. The new chip reduces the components required and yet provides all of the extended functionality. Available with a Type A or Type B USB connector. More info..
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A small carrier board for the Ethernet 10/100 base XPort webserver module (by Lantronix Inc). The board includes a 3.3v regulator, a Max3232 RS232 transceiver, and has provisions for using the modules three control pins. More information and software for the XPort module visit the Lantronix website. More info...
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Handy, small, versatile general purpose controller boards for 28 Pin PIC microcontroller. Perfect for quick projects, robotics or use as a handy bench tool. Includes two eeproms (for data storage).
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Tiny footprint can fit small project enclosures. With a bootloader, the PIC can be programmed serially.
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20 contact and carrier pcb for TAB/COG LCDs which have a 0.5mm pitch 20 contact Flat Flex ribbon cable. The carrier can fit in a standard 0.6” wide 20 pin IC socket
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Shown assembled
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Mini Power Supplies for breadboards 5v, 3.3v and dual voltage modules for quick prototyping and projects. Standard .1” pins easily connects to pcbs and development boards.
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Windows interface applications
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Freedownloads in the Benchware section
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Sed1330F 256x128 Graphic LCD using an Atmel AT90S8535 micro. Code written in BascomAVR 1.11.62 by mcselec.com
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Some of our favorite places to buy PIC related hardware, software and resources.....
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All Rights Reserved, Copyright (c) COMPSys , 2012
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Windows is a registered trademark of Microsoft Corporation. PICMicro is a registered trademark of Microchip Inc.
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AVR is a registered trademark of Atmel Corp., MAX is the trademark of Maxim Corporation
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