Özet:

This research aims to design and construct an electronic notice as an alternative to the traditional signpost parting on walls and billboards by providing practical, reliable and proper information dissemination. They consist of the following units, the power supply, voltage regulators, GSM modules, microcontroller, LED dot matrix display board, counter and subscriber identity module (SIM). The power supply comprises a 240/9 v ac 50 Hz step-down transformer rectifier filter and voltage regulations. AT89852, a low-power, high-performance CM05 8-bit microcontroller with 8 k bytes in-system programmable flash memory, is used in this design. A constant five v de is required to power microcontrollers and their associated input/output channel. GSM Modern is a wireless device that works with a GSM wireless network. The counter circuit of the device used to achieve this type of counting is the 5-stage Johnson decade counter. It is a typical chip in the 74HC555, with ten decoded outputs that go high one at a time. The assembler used for this research is MLAB version 5.7, downloaded from the microchip website. This window-based integrated development environment (IDE) software supports the PIC and other microcontrollers. The project constitutes both the software and hardware section for successful implementation. Operation more focus was given to the contribution of the system hardware. For verification of proper functionality of the message board, variation tests carry out and their results. Each component was carefully tested, and hardware troubleshooting and software debugging were carried out. The message was sent, and it appeared and started moving from left to right.

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