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Printed circuit boards are used for various product manufacturing and assisting purposes. This paper deals with a multifaceted trainer board for integrating various modules for Internet of Things (IoT) applications. As IoT plays a major role in the upcoming technological growth, the next generation of students need to learn about the hardware and software involved in a more effective manner. Also hardware is vital for hands-on training. To guide the students and aspirants to apply various ideas onto one board requires a perfect trainer board. Moreover, this trainer board should be well flexible to handle a vast variety of modules. Arduino Mega, is one example, where programming and interfacing of modules are easy and well-suited to develop IoT applications. This novel trainer board is designed for interfacing with the Arduino Mega, HC-05 (Bluetooth module) and Node MCU (Wi-Fi module) that are embedded on the board. The main purpose is to interface various Analog/Digital/PWM pins with various devices. Each Digital or analog pins are connected with 3-port or 4-port female headers to enable various modules to be linked with the board. Also, each 3 or 4-port header pins are connected with power supply and ground by default and there are interlinks between Analog/digital I/O. The board and external modules can be powered with 5V, 9V and 12V which can be selected based on the application.

The usage of natural fibre as reinforcement in polymer composites has increased in the recent years with rising concerns of environmental pollution and the heavy dependence on synthetic fibres from petroleum products of the middle east and the amount of material available in the tropical countries for such low prices. These materials can decrease our dependency on conventional materials like plastics, thereby decreasing the amount of pollution we cause on disposal and manufacturing of those. In general, the impact strength of the natural fibre composites is considered to be low and this experiment quantifies these results. This research describes the fabrication of a polymer composite, using banana fibre as the reinforcement and epoxy as the polymer matrix. A sequence of samples was prepared by varying various parameters like length, volume fraction and treatment of the fibre. The parameters were optimized using Taguchi’s DOE and the combination of parameters which yields us the best result and the contribution of each parameter. The impact strength has been studied using IZOD impact tester. The work has quantified that the impact strength of the composite depends mostly on the volume fraction and also only up to a certain range and then decreases as we increase the quantity of fibre. The same goes with both alkali treatment and length of the fibre which also contribute respectively. The optimum length, volume fraction and chemical are 1mm, 25 wt% and 2% NaOH treatment shows better result.