Web Dev Board

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Web Dev Board

Since this is a networked device which requires a MAC and IP address it is assumed that it will be used in a local intranet only. For Internet applications one is  required to have a valid MAC and IP address. Users are encouraged to download Microchip’s PICDEM NET documents as well as acquire their TCP/IP Stack package. The TCP/IP stack firmware is written in ANSI C and can be compiled with their MCC18 compiler or Hi Tech’s PICC18. This kit can also be used in conjunction with Jeremy Bentham’s TCP/IP Lean book (2nd edition). His software can be compiled with CCS C as well as Hi Tech PIC compiler

A very compact and affordable PIC based ethernet board with Microchip’s TC/IP stack and simple webserver which plugs in directly in to a local network via its RJ45 connector. It is based on Microchip’s PICDEM NET demo board. It includes a PIC18F452 and a 32kb eeprom to store the mini website and also has a standard RS232 I/O for connecting to a PC, terminal or serial LCD.All unused pins are brought to headers so that they can be used for other purposes. The MCLR, RB6,RB7 pins are available so that they can be used to program the PIC using a programmer such as MELab’s EPIC. Another possibility is to program the PIC by using a PIC bootloader and the DB9 serial connector. The firmware makes it possible so that webpages can be designed to receive data such as analog readings, pin  and port status from the PIC as well as control the PIC’s I/O pins.

Download Assembly Manual webdev.pdf

About the kit and assembly notes

The kit incorporates numerous surface mount parts (SMD). The RTL8019AS is a 100 pin TQFP. I solder this part on the pcb before shipment. The user will have to install the remaining  SMD parts (resistors,caps and the SOIC eeprom).Assembly of this kit requires that the user has the necessary tools and skills to work with SMD (surface mount device) components. If one is not comfortable with  soldering miniature parts, then it is advisable to seek assistance from someone who is capable to do so. Small mistakes can cause many frustrating hours of grief in trouble shooting!Minimum tools required: A  fine point low power (25w max) soldering iron and thin solder. Ideally, 0.022" diameter (or less) silver-bearing non-corrosive rosin core should be used. In addition. narrow needle nose pliers, diagonal cutting  pliers, good quality tweezers, large magnifying glass, volt-ohm meter, and a 7 to 12 vdc power supply.Make sure that you work in a clean well lighted area and have adequate desk area. If you have carpeting then  please be aware of static discharge as well as accidentally losing tiny components in the carpets fiber. SMD capacitors and resistors are very tiny and can quickly become invisible in the carpeting.

PCB and components shown at various points of assembly

Images below are of Web Dev Ver 1

PCB  RTL8019 and SMD LEDs and resistors mounted. The pcb is shipped with only the RTL8019 already installed.

Backside of the pcb with the SMD resistors, capacitors and 24LC256 SOIC eeprom installed.

Partially populated top side of the pcb with the IC sockets, LEDs, 20mhz resonator, 20mhz xtal, ICSP header pins and reset switch.

Completed assembly with the RS232 DB9 connection, Max233 IC (Ver 2 uses a Max232 SOIC), PIC18F452, 5v Power Regulator and RJ45 sockets which includes the magnetics.

Support Files

Update: Revision Change Web Dev Board Ver 2

To relieve congestion, the RS232 20 pin DIP IC is replaced with a 16pin SOIC (w/four 1uf SMD caps)

The 16 PIN SOIC is not mounted when shipped

Added a reverse supply voltage protection diode

All Rights Reserved, Copyright (c) COMPSys , 2018

Updated on:

February 16, 2018 

Windows is a registered trademark of Microsoft Corporation. PICMicro is a registered trademark of Microchip Inc.

AVR is a registered trademark of Atmel Corp., MAX is the trademark of Maxim Corporation