Persistence of vision (POV), Propeller led display

  Propeller LED Display :-

                                        The aim of this project is to display information like Name, Title, Time and any other information on it. It is a very simple and interesting project for hobbyist. By using some LED’s we can display any information on it. Here we have used 5×7 Dot-Matrix codes for displaying information. This circuit is attached to a DC Electric Motor. This project is based on concept of persistence of vision (POV).  Means if an object is remaining constant, at a point while it is moving at very fast speed then it looks like a stable image or pattern

             

INTRODUCTION :- 

                                  Propeller is a term associated with circular rotating objects conventional method of displaying images are manually using LCD display and Dot Matrix where a huge number of LED and power processor are used to create the display the main idea of this project is to use minimum number of led's and components to create a virtual display with minimum power consumption for the purpose of displaying a set of LED have been used hence the name Propeller display.

What is Persistence of Vision :-

1.  The human eye cannot process more than 10-12 images per second.​
2.   Because of POV, the human eye has the optical illusion that the object is moving continuously, though it is just the series of Static Images                                       

                

APPLICATIONS OF POV  LED DISPLAY :-

                                                                            This  project is designed to display messages in a scrolling format on an alphanumeric –LED Display this type of LED display board circuit is available in public places like railway platforms, transport vehicles, banks, schools, hospital, industries , etc  to display information.​

CIRCUIT DIAGRAM :-

 

  

COMPONENTS  :-

• Resistor ( 220 Ohms 8 PIECES)​
• LEDS (8 PIECES)​
• Arduino Nano
• DC Motor​
• Zero PCB Board​
• LIPO Battery​
• Connecting wires​
• Transformer​
• Rectifier​
• Hall sensor​ 

RESISTOR :-

                       A Resistor is a passive two-terminal electrical components as a circuit element circuits, resistors are used  to reduce current flow, adjust signal level, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

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LED :-

             A light emitting diode is a semiconductor light source that emits light when current flows through it.​

               

AURDINO NANO :-

                                   Arduino nano  is a small, compatible , flexible and breadboard friendly microcontroller board, developed by arduino.cc in Italy, based on ATMEGE328p​

• It comes with an operating  voltage of 5V, however,  the input voltage  can vary 7to 12V.​

• It contains 14 digital pins,8 analog pins, 2 reset pins and 6 Power pins.​

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DC MOTER :-

                         A brushed DC motor is used to spin the whole circuit assembly which is required for continuous vision. The speed should be in the range from 1000 rpm to 3000 rpm to have a good quality display.​

                                              

ZERO PCB BOARD :-

                                        Zero printed  circuit board refers to an all  purpose and conventional PCB that embeds the circuits arbitrarily to ensure the continuous functioning of the hardware. The layers of general purpose circuit board are coated with copper as to allow appropriate soldering of components of PCB.​

             

CONNECTING WIRES :- Jumper wire

TRANSFORMER :-

                                   In a motor driver circuit, the power from AC Mains is stepped down to a motor- operating range by step down transformer.

                           

RECTIFIER :-

                         A Rectifier is  convert AC Into DC and vice versa  in this project in DC Motor the AC voltage is converted into DC Using a rectifier.​

HALL SENSOR :-

                                 A Hall-effect sensor (or simply Hall sensor) is a device to measure the magnitude of a magnetic field. Its output voltage is directly proportional to the magnetic field strength through it. The sensor type is named after the American physicist Edwin Hal​.

A wheel containing two magnets passing by a Hall-effect sensor all-effect sensors are used for proximity sensing, positioning, speed detection, and current sensing applications. Frequently, a Hall sensor is Combined with threshold detection ,so that it acts as and is called a switch

WORKING :-

CONSTRUCTION OF POV LED DISPLAY :-

• Firstly take PCB board  and then take LEDs and resistors. ​
• Then we solder LEDs into PCB Board leds have two terminal positive and negative ​.
• Soldering resistors with LEDs positive terminals.​
• All LEDs cathode connect to ground.​
• Connecting positive terminal of LEDs to arduino nano pins as follows​.
• LEDS1= D2  LED 2= D3  LED 3= D4 ​
• LED 4 = D5  LED 5=D6   LED 6= D7 ​
• LED 7 = D8  LED 8= D9​
• Then connecting positive terminal of battery to arduino nano pin 5v and negative terminal to ground pin.​

               

SOFTWARE USED:-

• Arduino intergrated development environment (IDE) is a cross-platform application that is written in the programming language java. It originated from IDE for languages processing and wiring.
• Aurdino IDE Software​​

download code

Click here for code  https://github.com/meenajii/persistence-of-vision

Special Thanks to my Team :-

                                                     Ravi Kumar Meena

                                                     Mansi Gupta

                                                     Priya Patel

                                                     Rahul Kumar

                                                     Vivudh Kumar Rai