Components are soldered on both sides of the PCB. Only components that need to provide the required functionality should be soldered. Depending on your situation, some components such as CONN1, CONN2, CONN4, CONN5, L1 etc can be soldered on either side of the board. There is no strict sequence for soldering but U1 should be […]
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The GSM part is based on SIM900D GSM module. SIM300DZ has the same pin layout and designation so it might be used as a replacement of SIM900D. Q1 transistor, R2, R3 and R4 resistors are used to drive LED1 ‘NET LIGHT’ which indicates module networking status. CONN4 is a SMT antenna connector. Q2 transistor and […] This module is a cost effective and flexible solution providing your own microcontroller with wireless Internet connectivity, remote controlling via SMS and GPS functionality. As a GSM module either SIM900D or SIM300DZ might be used, some of the most affordable GSM modules currently on the market featuring embedded TCP/IP stack over AT commands so measurement […] Gps Gsm Module Top View Gps Gsm Module Bottom View GSM/GPS module is a compact, flexible and powerful solution allowing to add GPS functionality and/or Internet connectivity to your own device with minimum effort. The module is designed as one of a few interchangeable transport connectors for DefendLineII project but could […] It is a known fact that C328 JPEG Serial Camera has been discontinued and not available on the market anymore. But there is a replacement called uCam-TTL Serial JPEG Camera module which is currently being produced and sold by Australian company called 4D Systems. The camera has the same QV7640 image sensor, serial interface and […] DefendLineII has a native support of JPEG Colour Camera (C328 compatible). Such type of camera is capable of delivering VGA quality still pictures, it is equipped with hardware JPEG compressor and serial interface making integration with embedded devices quick and easy. This camera requires two wires (RX and TX) for serial communication, ground and positive […] A great deal of DefendLineII configuring might be done over a terminal. To use this option the board must be connected to PC via USB cable and serial selector JP1 must have pins 1 and 2 connected together. As a terminal program standard Windows HyperTerminal can be used but it is not very convenient tool, […] Building firmware is pretty much similar to building bootloader described in the previous article. Assuming that you have WinAVR and SVN already installed, your DefendLineII PCB has bootloader flashed and avrdude can communicate with the board so you are ready for the procedure. Download source code for DefendLineII project if you have not done […] A bootloader is a compact executable code often flashed in upper program memory area implementing basic transfer protocol and facilitating self-programming function, making possible firmware updates without need to have an external programmer. In most cases bootloaders simulate basic programmers to take advantage of already existing software support without invention of something new. Of course, […] DefendLineII PCB will be distributed in three kits: just a PCB, without any components, a pre-assembled PCB with just ATMega1280, FT232BL, DS1621, PCF8563, MicroSD connector, crystals, ISP10 header and a few resistors/capacitors soldered and fully assembled with all components soldered. If you decided to solder component by yourself then we hope you will find these […] |
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