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In this paper we provide one of the state of art solution for power saving technique of LED street lighting with variable intensity of light. Today's world of computerization and digitization, it is needed to automate the system and consume less power with maximize efficiency of a system. We proposed a system which lighting the street as per requirement like sun light condition, traffic on road, etc...
Security is a major concern in our day-to-day life since it can prevent intentional or unintentional interference in human life with the proper operation of security system. In this project based research work, two set of piezoelectric transducer (PZT) are used. When anybody stands on PZT (I), the buzzer indicates the problem detection and LED light shows the problem occurring place. The buzzer and...
A digital potentiometer, which can be used to implement automatic calibration procedure in a circuit, to control a switch of a power supply, or as a load tester, was developed by using a light-dependent resistor (LDR) and implementing a proportional controller. It consisted of a light emitting diode (LED) used to change the resistance of LDR, two LDRs set as the output and the feedback of the controller,...
This study proposes the use of radial visual stimuli design to obtain increased steady state visual evoked potential (SSVEP) responses that can be utilised in brain-computer interfaces (BCI). Visual stimuli designs based on chip on board (COB) LEDs were used in this study to compare the influences of the radial with horizontal and concentric patterns in SSVEP. Circular rings with diameters 70 mm,...
Modern age electronic systems give highest speed and performance. Hardware optimization leads to reduction in board area, hardware, number of components and also the manufacturing cost of the electronic system. Optimization becomes severe in design of battery operated portable equipments. By using multifunctional input output port pins, device level optimization can be achieved. Higher optimization...
Visible Light Communication (VLC) Technology is the short range optical wireless communication technology using LEDs for communication and illumination. In this paper, we propose a repeater system for visible light communication to extend the coverage. Our proposed repeater system is composed of hardware and software components. The transmitter converts text data sending from the user into light signal...
The design uses AT89C51 series of high-speed microcontroller as the main control module, using a simple peripheral circuit to drive the 32 ∗ 16 dot matrix LED display. It consists of microcontroller, gating circuit, row and column driver circuit, display circuit. The design uses parallel transmission and dynamic scanning technology. Using the principle of LED display, this article elaborates LED dynamic...
There are billions of neurons interconnected in human brain. Human thoughts and their emotional states affect the interactions between these neurons. Every interaction between these neurons creates an electric discharge which cannot be measured using current technology. However, the activity created by thousands of concurrent electric discharges aggregates into waves which can be measured. The sequences...
This paper presents an ID tag concept which is LED powered. The photovoltaic effect of the LED array is used to harvest energy from ambient light or from light source in reader device in order to power the tag. Harvested energy is stored in a capacitor that is used to supply ID tag logic which transmits ID information using one diode of LED array which is also used for powering. The powering circuit,...
Today, all count words are about how to enhance the electrical grid reliability during the peak instant. The direct solution for the grid is to cut off some loads to keep its stability. One of these loads is the street lighting especially during the summer period. This paper proposes an energy-free system for street lighting as there is no power demand from the grid. A standalone solar street LED...
This article describes a design of Digital Control of DC current source based on AVR microcontroller. The system uses the Atmega8 as the main chip and consists of keyboard input, LCD display, I / V conversion, power amplification and other modules. It uses a negative feedback closed-loop control. The MCU can compare real-time the preset value with the measuring results, and adjust the settings, in...
Data acquisition and high-speed transmission technology are urgent detection and monitoring method for large precision rotating machinery, such as generators, advanced printing and so on, especially the high-speed rotating object. Traditional technology has some deadly drawbacks-low transmission speed and poor adaptation to the environment, so wireless transmission technology has been studied to break...
“Technology does not drive change, it enables change.” The primary purpose of Technology is its implementation in day-to-day life wherein it could enhance the lifestyle as well as provide better safety and performance to its end users. The government has enforced stringent laws against usage of mobile phones while driving a vehicle. Yet, there seems to be a sense of casualness amongst our citizens...
We present here, an open-source printed circuit board (PCB) platform for the prototyping, testing and trialing of non-invasive oximeter devices. The system is designed around a dspic33fj128gp804 microcontroller with coding in C. It can control over 100 LED and photodiode devices and has two modes, one for calibration and one for signal interrogation. At the top-level, the microcontroller has ports...
This paper depicts the implementation of a colorful RGB-LED light source with an 8-bit microcontroller. The microcontroller regulates LED light output with pulse-width modulation current and changes the light color with the current ratios of red, green and blue LEDs. While the LED light output varies with temperature, the microcontroller stabilizes the light output of LED with feed-forward compensation...
An intelligent dimming system based on LED lamps is presented. The design of hardware and software is given. The system has two working modes. One is manual mode and another is automatic mode. In manual mode, the brightness level of LED lamps is adjusted by keys. In automatic mode, the brightness level is adjusted automatically according to environment. An Infrared detector and a photo sensor are...
The manual operation mode of measuring transfusion speed in medicine is inconvenient and inaccurate, and is likely to cause dispute. A supervisory computer was designed to monitor transfusion speed. It mainly consisted of MCU C8051F930 as the control core, a photoelectric switch as liquid drop sensor, a threedigit seven-segment LCD, four keys, four LEDs and acousto-optic alarm circuits. The supply...
This paper describes a design of an embedded system used to facilitate the control of a wheelchair. Wheelchair users are able to operate a joystick to control the chair, however many more severely handicapped users need some other means of controlling this type of robot. The designed system is based on grouping a microcontroller with a new voice recognition processor for isolated word and speaker...
A planar thin-film technology is applied directly on the fabric to fabricate a planar fashionable circuit board (P-FCB) and to introduce a direct chip-integration technique on a P-FCB. Planar technology, which has helped make the current advance of electronics technology possible, is used to fabricate P-FCBs. Planar capacitor humidity sensors, a low-power controller chip and LEDs are integrated on...
We present an implantable flight control microsystem for a cyborg beetle. The system consists of multiple inserted neural and muscular stimulators, a visual stimulator, a polyimide assembly and a microcontroller. The system is powered by two size 5 cochlear microbatteries. The insect platform is Cotinis texana, a 2 cm long, 1-2 gram Green June Beetle. We also provide data on the implantation of silicon...
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