The more robust the hardware becomes (i.e. Persistence of vision 3d clock software#The nature of our design allows the software and hardware design to be independent of each other in terms of trade-offs. The logic behind this project is very straightforward. The overall design of this project can be grouped into the following three categories: electrical design, mechanical design, and software design. We will make all the hardware from scratch and all the software will be our original work with some assistance from the project head. Our project will not include any existing patents, copyrights, or trademarks. To display the characters, the circuit had a memory capacitor to keep the character displaying even when the power is not supplied to the circuit. The circuit also consisted of a phototransistor to generate a precise index pulse. The next paper that we referred was Low-Cost Propeller LED Display by Manavi Sharma1and Krishan Mohan (The project in this paper used a VCR motor to prevent noise). We are using Arduino Atmega 328 due to its extended features and simple implementation. The project referred to in this paper used a microcontroller AT89C2051, which had few drawbacks. To enhance the synchronization of the display we will remove the interrupt module in our project. It was not an effective way to generate the display as there would be an interrupt after displaying each column and this adds to the extra delay. Introducing an interrupt module complicated the coding and the hardware part. In our project, the hardware is further simplified by removing the interrupt module and programmatically implementing it. An interrupt module is used (Interrupt circuit), to introduce an interrupt after each revolution. This change in the logic level was sensed by the microcontroller or by discrete hardware. When light emitted by the IR LED is blocked because of some completely opaque object, the logic level of the photodiode changed. It consisted of IR LED and Photodiode facing each other enclosed in the plastic body. This module was interfaced with the microcontroller with two resistors and a general-purpose transistor. This sensor was used because of its small size, precise interrupt sensing, and study casing. This used an Interrupter module consisting of the IR interrupt This project is based on the microcontroller AT89C2051, which is a derivative of the 8051 families, from Atmel Inc. Here are the past theories on this project : This shows how the theory and concept have been implemented to solve project problems. The objective is to explain the perspective and method which has been used in the past projects and to observe how this project can be related to existing research and theory. Here are the theory and concepts from the past projects. In other words, vision is not as simple as light registering on a medium, since the brain has to make sense of the visual data the eye provides and construct a coherent picture of reality. A critical part of understanding that emerges with these visual perception phenomena is that the eye is not a camera and does not see in frames per second. A visual form of memory known as iconic memory has been described as the cause of this phenomenon. For example, Newton Disc, Kaleidoscopic color top, Thaumatrope, rubber pencil trick etcetera. There are a lot of applications of persistence of vision. A POV display exploits this phenomenon by spinning a one-dimensional row of LED's through a two-dimensional space at such a high frequency that a two-dimensional display is visible. Persistence of Vision (POV), occurs when a visual image seems to persist continuously when a stream of light is repeatedly interrupted for very brief instances and does not enter our eyes during those durations. Keywords:- POV technology,Arduino,Micro controller,LED display,Microprocessor The rotational speed of the LED's is fast enough such that the human eye perceives a two-dimensional image.Our project focuses on meeting the tremendous growth of advertisement. This display will allow users to upload an image to be displayed through wireless communication using LED lights. The objective is to develop an LED display system which uses enormously lesser amount of LEDs and power consumption than the normal LED display and which is compact in nature using persistence of vision based technology. Department of Electrical and Electronics Engineering Maharaja Agrasen Institute of Technology Delhi,IndiaĪbstract:- The purpose of this project is to design and to create a persistence of vision (POV) display.
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