The SBC28DC is a single board computer for 28 pin PIC microcontrollers. It has a RS232 serial interface that is available via a standard 9 pin D-Sub, male connector. Some examples of 28 pin DIP PIC chips that this board is designed for (There are many more!):

• PIC18F242, PIC18F252, PIC18F248, PIC18F258
• PIC18F2320, PIC18F2410, PIC18F2680 (CAN BUS), PIC18F2550 (USB)
• PIC16F870, PIC16F873(A), PIC16F876(A)
• PIC16C63, PIC16C66, PIC16C73(A), PIC16F73, PIC16C76, PIC16F76

• PIC16F872
• PIC16C62(A), PIC16C72
• Many more PIC chips that match the above mentioned criteria!

By default these boards don't have a crystal assembled. A Crystal is not required seeing that all PIC chips have built in crystals. Typically the built in crystal is 4MHz or 8MHz. If a higher or special clock rates is required, it can be selected via the options below. For example, if this board is going to be used to communicate at a standard BAUD rate (9600, 19200, 38400, 57600, 115200...), then the 18.432MHz crystal should be selected below. With this crystal, the exact BAUD rate can be obtained with 0% error.

• 22 I/O ports when using common PIC chips, for example the PIC16F876A or PIC18F252.
• Is part of our MicroX product range, and has a Frontend and Compact Daughter board connector for expansion. For details see www.modtronix.com/microx.
• Compact size of 58mm x 54mm. For details see www.modtronix.com/microx/dimensions.
• Assembled with High Quality, Industrial Temperature components - electrolytic capacitors used are extra long lifetime rated!
• Diode protected 2.1mm power connector for a standard DC transformer.
• Wide operating voltage range from 7 – 30V. It is recommended to use a 7.5V or 9V DC power supply.
• On board 15kV ESD protected RS232 interface. Assembled with industrial temperature range interface driver chip.
• Standard 9 pin, D-Sub male connector with RS232 signals, ground and external power.
• The power pin (pin 9) on the D-Sub connector can be connected to the boards unregulated power supply (the input of the 2.1mm power connector) via a jumper. This can be used to obtain power for this board. When used, no power has to be supplied via the 2.1mm power connector. It will obtain it's power via the D-Sub connector.
• Power LED to indicate when device is powered.
• Micro Match socket with Power, I2C and SPI signals. The Micro Match connector can be used to daisy chain multiple I2C devices together, like our LCD2S Serial LCD displays with keyboard decoder. For details, click here.
• Has an ICSP (In Circuit Serial Programming) connector (ICPC1 type) - CPU can be programmed in circuit. For details see Programming Modtronix PIC based boards.

• For additional info, please see our user forum.

• SBC28DC SBC Main Board, fully assembled. As shown in

• PIC Microcontroller
• Crystal - For details see description above