Led globe (POV)
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Transcript of Led globe (POV)
LED GLOBEPersistence of Vision
R.M. Chanaka Prabath KarunarathnaScience & Technology Degree ProgramMechatronics
Introduction
• It is some kind of eye cheating. If some one cango faster than light people can't see it. like thatrotation speed and delay will create a LEDglobe.
• It simple design easy to understand any one….
My scope…
Components
• 1 - 16F877A Microcontroller
• 32 - Blue color LED
• 32 - 330 ohms resistors
• 1 - 10k ohms resistor
• 2 - 22pf capacitor
• 2 - 104pf capacitor
• 2 - 47uf capacitor
• 1 - 20Mhz crystal
• 1 - Push button
• 1 - LM7805
• Connecting wire &
• Lead wire
You can easily find these components
Microcontroller
• It can use 16F877A microcontroller or any other microcontroller.
How to give power to it...• It can use LM7805 voltage regulator to give a
power to this circuit.
• It gives exact 5v to the circuit.
• To smooth that voltage, can use 104pf and 47fcapacitors. Then it gives a smooth exact 5v to thecircuit.
LED
• Here used Blue color Light emitted diode (LED).
• As you wish you can use any color of LED.
• If you like you can use RGB led it will complex.
Circuit designing
• You can use PCB wizard Proteus or any kind of PCBdrawing software to design a circuit.
Structure Design
• Here used some PVC pipe to create anArc. Else some thing can have an Arcshape.
• Also important to have a good strongand heavy basement.
Coding
• It was used Pic C compiler to code or you can useany other compiler.
• 1st you have to create a sketch of world map andhave to divide it into columns and rows. In here itused 32 rows and 60 columns.
• Then it have to enter to excel sheet it is easy tofurther coding.
Cont.…
• After finishing all coding part Itshould have upload code to theMicrocontroller there for we have touse pic kit 2 programmer to programmicrocontroller.
• After finishing coding and hardwarepart you have to fix it properly andgive 6-15 voltage to work it properly.