Difference between revisions of "Explore POV"

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=Introduction=
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[[category: DIY Hobby Kits]]
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==Heading1==
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[[User:Sandeep|Sandeep]] ([[User talk:Sandeep|talk]]) 15:35, 6 March 2015 (IST)
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===Heading1===
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----
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====Heading1====
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=====Heading1=====
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The colorful Persistence Of Vision (POV) kit enables you to create colorful messages in air with just 8 LEDs. This kit is great introduction to soldering and AVR/Arduino Programming.  The kit does not require a external programmer, it is self programmable with USB.
−
======Heading1======
+
 
 +
 
 +
[[File:POV poster copy.jpg]]
 +
<gallery mode="packed-hover">
 +
File:Explore POV final.jpg|DIY Kit contains
 +
File:Explore POV layout.JPG|Component Placement
 +
</gallery>
 +
 
 +
 
 +
 
 +
=Solder it!=
 +
[[File:POV_Board_Soldering_Steps.gif|framed|POV  Sequence for Soldering the Board]]
 +
*Image above shows the layout of various components for the board. It is also printed on the PCB.
 +
*The image sequence shows, how to mount and solder components!
 +
==Component Layout==
 +
The image shows reference numbers for all the components.
 +
 
 +
*From the table below find out the exact part for the reference number.
 +
==Component List==
 +
{| class="wikitable"
 +
|-
 +
!
 +
<center>'''ref'''</center>
 +
 
 +
!
 +
<center>'''value'''</center>
 +
 
 +
!
 +
<center>'''Item count'''</center>
 +
 
 +
|-
 +
|
 +
<center>C1</center>
 +
 
 +
|
 +
<center>4.7uF</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>C2</center>
 +
 
 +
|
 +
<center>100nF</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>C3,C4</center>
 +
 
 +
|
 +
<center>22pF</center>
 +
 
 +
|
 +
<center>2</center>
 +
 
 +
|-
 +
|
 +
<center>CON1</center>
 +
 
 +
|
 +
<center>AVR-ISP-10</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>D1,D2</center>
 +
 
 +
|
 +
<center>3.6V Zener</center>
 +
 
 +
|
 +
<center>2</center>
 +
 
 +
|-
 +
|
 +
<center>IC1</center>
 +
 
 +
|
 +
<center>ATMEGA8-P</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>J1</center>
 +
 
 +
|
 +
<center>USB_2</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>LED1..LED8</center>
 +
 
 +
|
 +
<center>LED-RGB</center>
 +
 
 +
|
 +
<center>8</center>
 +
 
 +
|-
 +
|
 +
<center>P8</center>
 +
 
 +
|
 +
<center>Batt</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>Q1..Q3</center>
 +
 
 +
|
 +
<center>BC547</center>
 +
 
 +
|
 +
<center>3</center>
 +
 
 +
|-
 +
|
 +
<center>R1</center>
 +
 
 +
|
 +
<center>2.2K</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>R2,R3</center>
 +
 
 +
|
 +
<center>68E</center>
 +
 
 +
|
 +
<center>2</center>
 +
 
 +
|-
 +
|
 +
<center>R4</center>
 +
 
 +
|
 +
<center>10K</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>R5..R12</center>
 +
 
 +
|
 +
<center>22</center>
 +
 
 +
|
 +
<center>8</center>
 +
 
 +
|-
 +
|
 +
<center>R13..R15</center>
 +
 
 +
|
 +
<center>1K</center>
 +
 
 +
|
 +
<center>3</center>
 +
 
 +
|-
 +
|
 +
<center>SW1</center>
 +
 
 +
|
 +
<center>Boot</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>SW2</center>
 +
 
 +
|
 +
<center>Reset</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|-
 +
|
 +
<center>X1</center>
 +
 
 +
|
 +
<center>12MHz</center>
 +
 
 +
|
 +
<center>1</center>
 +
 
 +
|}
 +
 
 +
=Programming=
 +
==C Code==
 +
<syntaxhighlight>
 +
#include <avr/io.h>
 +
#include<util/delay.h>
 +
#include<stdint.h>
 +
#include<avr/interrupt.h>
 +
 
 +
#define Blue 3
 +
#define Green 4
 +
#define Red 5
 +
 
 +
uint8_t i=0; 
 +
 
 +
 
 +
const static uint16_t image[]=  
 +
{
 +
0b0000100011111111, 0b0000100011111111, 0b0000100011111111, 0b0000100011111111,
 +
0b0000100011111111, 0b0000100011111111, 0b0000100011111111, 0b0000000000000000,
 +
0b0000010011111110, 0b0000010000010001, 0b0000010000010001, 0b0000010000010001,
 +
0b0000010011100001, 0b0000000000000000, 0b0000010001111110, 0b0000010010010001,
 +
0b0000010010010001, 0b0000010010010001, 0b0000010000001110, 0b0000000000000000,
 +
0b0000001011111111, 0b0000001000010001, 0b0000001000010001, 0b0000001000010001,
 +
0b0000001000001110, 0b0000000000000000, 0b0000001000001110, 0b0000001000010001,
 +
0b0000001000010001, 0b0000001011111111, 0b0000000000000000, 0b0000000000000000,
 +
0b0000100001110000, 0b0000100011111100, 0b0000100011111110, 0b0000100011111111,
 +
0b0000100011111111, 0b0000100011111110, 0b0000100011111100, 0b0000100001111000,
 +
0b0000000000000000, 0b0000000000000000, 0b0000010011111110, 0b0000010000010001,
 +
0b0000010000010001, 0b0000010000010001, 0b0000010011100001, 0b0000000000000000,
 +
0b0000001001110000, 0b0000001010001000, 0b0000001010001000, 0b0000001010001000,
 +
0b0000001011111111, 0b0000000000000000, 0b0000001001110000, 0b0000001010001000,
 +
0b0000001010001000, 0b0000001010001000, 0b0000001011111111, 0b0000000000000000,
 +
0b0000010001111110, 0b0000010010010001, 0b0000010010010001, 0b0000010010010001,
 +
0b0000010010001111, 0b0000000000000000, 0b0000000000000000, 0b0000010011111111,
 +
0b0000010000010000, 0b0000010000010000, 0b0000010000010000, 0b0000010011111111
 +
};
 +
 
 +
void disp(uint16_t);
 +
 +
ISR (TIMER1_OVF_vect)    // Timer1 ISR
 +
{
 +
disp(image[i]);
 +
i++;
 +
 +
if(i==72)
 +
i=0;
 +
 +
TCNT1H=0xFF;    // Reload the 16-bit count value
 +
TCNT1L=0xF0;    // in timer1 count registers
 +
}
 +
 
 +
 
 +
int main(void)
 +
{
 +
    DDRC = 0b11111111;
 +
DDRD = 0b11111111;
 +
 +
PORTC = 0b11111111;
 +
PORTD = 0b00000111;
 +
 +
TCNT1H=0xFF;  // Load the 16-bit count value
 +
TCNT1L=0xF0;  // for 1 sec at 7.3728MHz
 +
 
 +
TCCR1A=0x00;
 +
TCCR1B=0x05;  // Timer mode with 1024 prescAler
 +
TIMSK=0x04;  // Enable timer1 overflow interrupt(TOIE1)
 +
sei();        // Enable global interrupts by setting global interrupt enable bit in SREG
 +
 +
    while(1)
 +
    {
 +
   
 +
    }
 +
}
 +
 
 +
void disp(uint16_t pat)
 +
{
 +
 +
PORTC = pat & 0x3f;
 +
PORTD = (pat>>6)& 0xff;
 +
}
 +
 
 +
 
 +
</syntaxhighlight>
 +
 
 +
==Arduino Code==
 +
Arduino Code will be uploaded soon.
 +
==Pattern Generation==
 +
To create an image/patterm, you can use the POV image maker application.
 +
[[Image:Maker.PNG|400px|link=http://pov.exploreembedded.com/ImageMaker.html]]
 +
 
 +
==Uploading the Pattern==
 +
* [http://www.fischl.de/usbasp/usbasp-windriver.2011-05-28.zip  Install USBasp  driver] on your computer. Note that the it will show up as not recognized if the reset sequence is not followed
 +
===Reset Sequence for uploading new pattern/image===
 +
[[File:Pov-reset.gif|framed|right|POV Reset Sequence for uploading new image]]
 +
*Perform reset sequence every time you connect the kit to the computer.
 +
* To upload a new image, '''hold down the BOOT button, press and release the RESET button and then release the BOOT button''' as shown below.
 +
* Note the LEDS will stop blinking once the kit is detected by the computer.
 +
 
 +
=Downloads=
 +
*[http://exploreembedded.com/wiki/images/b/b3/Explore_POV_v1.pdf Schematic]
 +
{{DISQUS}}

Latest revision as of 15:32, 17 May 2016

Sandeep (talk) 15:35, 6 March 2015 (IST)

The colorful Persistence Of Vision (POV) kit enables you to create colorful messages in air with just 8 LEDs. This kit is great introduction to soldering and AVR/Arduino Programming. The kit does not require a external programmer, it is self programmable with USB.


POV poster copy.jpg

  • DIY Kit contains

  • Component Placement


Solder it!

POV Sequence for Soldering the Board
  • Image above shows the layout of various components for the board. It is also printed on the PCB.
  • The image sequence shows, how to mount and solder components!

Component Layout

The image shows reference numbers for all the components.

  • From the table below find out the exact part for the reference number.

Component List

ref
value
Item count
C1
4.7uF
1
C2
100nF
1
C3,C4
22pF
2
CON1
AVR-ISP-10
1
D1,D2
3.6V Zener
2
IC1
ATMEGA8-P
1
J1
USB_2
1
LED1..LED8
LED-RGB
8
P8
Batt
1
Q1..Q3
BC547
3
R1
2.2K
1
R2,R3
68E
2
R4
10K
1
R5..R12
22
8
R13..R15
1K
3
SW1
Boot
1
SW2
Reset
1
X1
12MHz
1

Programming

C Code

#include <avr/io.h>
#include<util/delay.h>
#include<stdint.h>
#include<avr/interrupt.h>
 
#define Blue 3
#define Green 4
#define Red 5
 
uint8_t i=0;  
 
 
const static uint16_t image[]= 
{
0b0000100011111111, 0b0000100011111111, 0b0000100011111111, 0b0000100011111111,
0b0000100011111111, 0b0000100011111111, 0b0000100011111111, 0b0000000000000000,
0b0000010011111110, 0b0000010000010001, 0b0000010000010001, 0b0000010000010001,
0b0000010011100001, 0b0000000000000000, 0b0000010001111110, 0b0000010010010001, 
0b0000010010010001, 0b0000010010010001, 0b0000010000001110, 0b0000000000000000, 
0b0000001011111111, 0b0000001000010001, 0b0000001000010001, 0b0000001000010001, 
0b0000001000001110, 0b0000000000000000, 0b0000001000001110, 0b0000001000010001, 
0b0000001000010001, 0b0000001011111111, 0b0000000000000000, 0b0000000000000000,
0b0000100001110000, 0b0000100011111100, 0b0000100011111110, 0b0000100011111111,
0b0000100011111111, 0b0000100011111110, 0b0000100011111100, 0b0000100001111000, 
0b0000000000000000, 0b0000000000000000, 0b0000010011111110, 0b0000010000010001, 
0b0000010000010001, 0b0000010000010001, 0b0000010011100001, 0b0000000000000000,
0b0000001001110000, 0b0000001010001000, 0b0000001010001000, 0b0000001010001000,
0b0000001011111111, 0b0000000000000000, 0b0000001001110000, 0b0000001010001000, 
0b0000001010001000, 0b0000001010001000, 0b0000001011111111, 0b0000000000000000,
0b0000010001111110, 0b0000010010010001, 0b0000010010010001, 0b0000010010010001,
0b0000010010001111, 0b0000000000000000, 0b0000000000000000, 0b0000010011111111, 
0b0000010000010000, 0b0000010000010000, 0b0000010000010000, 0b0000010011111111 
};
 
void disp(uint16_t);
 
ISR (TIMER1_OVF_vect)    // Timer1 ISR
{
	disp(image[i]);
	i++;
 
	if(i==72)
	i=0;
 
	TCNT1H=0xFF;    // Reload the 16-bit count value
	TCNT1L=0xF0;    // in timer1 count registers
}
 
 
int main(void)
{	
    DDRC = 0b11111111;
	DDRD = 0b11111111;
 
	PORTC = 0b11111111;
	PORTD = 0b00000111;
 
	TCNT1H=0xFF;   // Load the 16-bit count value
	TCNT1L=0xF0;   // for 1 sec at 7.3728MHz
 
	TCCR1A=0x00;
	TCCR1B=0x05;  // Timer mode with 1024 prescAler
	TIMSK=0x04;   // Enable timer1 overflow interrupt(TOIE1)
	sei();        // Enable global interrupts by setting global interrupt enable bit in SREG
 
    while(1)
    {
 
    }
}
 
void disp(uint16_t pat)
{
 
	PORTC = pat & 0x3f;
	PORTD = (pat>>6)& 0xff;
}

Arduino Code

Arduino Code will be uploaded soon.

Pattern Generation

To create an image/patterm, you can use the POV image maker application. Maker.PNG

Uploading the Pattern

  • Install USBasp driver on your computer. Note that the it will show up as not recognized if the reset sequence is not followed

Reset Sequence for uploading new pattern/image

POV Reset Sequence for uploading new image
  • Perform reset sequence every time you connect the kit to the computer.
  • To upload a new image, hold down the BOOT button, press and release the RESET button and then release the BOOT button as shown below.
  • Note the LEDS will stop blinking once the kit is detected by the computer.

Downloads

Retrieved from "https://exploreembedded.com/wiki/index.php?title=Explore_POV&oldid=9004"