Design Proposal for Inductor Type Buck Converter in Bluetooth Receiver Chip with Overshoot Cancellation and Ripple Reduction Technique

This paper presents a novel circuit design technique for an inductor type step-down buck converter in a blue-tooth receiver. Based on the superposition principle, a model of this system is proposed and verified by simulation. The overshoot phenomena is well controlled when R, L and C components are chosen by a relation |ZL|=|ZC|=2R based on a balanced charge and discharge time condition T=2π√LC=4πRC. Furthermore, a fundamental harmonic notch filter is recommended to keep small ripple which is designed at the fundamental harmonic frequency of PWM signal. A battery supply voltage of 3.6V was applied to the converter and the output voltage was set to 1.8V. The design of this methodology is given through the CMOS technology. As a result, a 1.8V stable step-down buck converter is designed for a blue-tooth low-IF receiver which the ripple is smaller than 0.2mVpp.

PROTOTYPE PERANCANGAN MEMBUKA DAN MENUTUP PINTU GERBANG RUMAH MENGGUNAKAN MOTOR DC BERBASIS ANDROID

<p>The gate is one of the main security in maintaining a home. Because the gate is the first coating to protect the contents and building of the house. It also did not escape the perpetrators of robbery criminal acts to have a way to overcome the weakness of protection given extra security on the fence. With the development of wireless technology, one of which is cheap and easy-to-use Bluetooth that can be reached by mobile phones that can be reached by all groups, Bluetooth is a facility on cellular telephones that is used to order to open and close doors with a Bluetooth application that is installed on a smartphone. The testing tool system method opens the gate of the house using an Android-based DC motor using an ATMEGA 8 microcontroller consisting of several blocks that are interconnected to one another. The results of the whole set of tools open and close the automatic gate using an android-based motor from a minimum system of ATMEGA 8, 5V Power Supply, blue-tooth, relay, handphone, LCD. Each component is interrelated and connected to form a whole set of tools opening and closing automatic gates using an Android hard-ware based hard-ware. Based on the experimental results the following conclusions can be drawn: (1) Bluetooth can work with a speed of 2.4 GHz and within 10 meters, (2) The speed of the blue-tooth application on the device is 0.1 s and (3) Relay is used as much as 4 to control 4 commands i.e. the first door is open and closed and the second door is open and closed.</p>

Design and implementation of blue tooth aided inexpensive safety band for fishermen

This paper presents with a new reliable inexpensive wireless health monitoring system designed for fishermen. Presently there are many smart devices available for the general population with many features in them that not put to use in every situation of our life. The most important aim of this paper is to deal with the safety and well-being of the fishermen during their voyage. The major cause of fishermen’s poor health during voyage is due to lack of proper health guidance to the fishermen. This paper proposes with the monitoring of the fisherman’s health through various sensors and relaying of those signals through blue tooth connectivity. The monitoring signals are finally obtained in Android mobile devices that can be used by the crew in real-time. The proposed approach is feasible for fishermen by establishing a software application to monitor the health of the fisherman. The proposed system is simple, economical and specifically designed for the people of the fishing community and it also enhances the motor control of the boat through the software interface by using a set of soft keys.