Brads Electronic Projects Forum

hi Brad,

The problem is that when I select the Top to Bottom option with a 16 x 16 image, image conversion is different compared to the program (POV BIG GRAPHIC CONVERTER "one chip")

Follows the same image converted with 2 programs below.




POV CONVERTER BIG GRAPHIC "one chip" image = 16 x 16

correct Image


const RedData(32) as byte = (%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000001,%00000001,%

00000001,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000,%00000000,%11000000,%11000000,%11000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000)


const GreenData(32)as byte =(%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000,%00000000,%00011100,%00011100,%00011100,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000)


const BlueData(32) as byte =(%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00011100,%00011100,%

00011100,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000)




'////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Arduino and Swordfish Graphic Converter image = 16 x 16


incorrect Image

const RedData(32) as byte = (%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000011,%10000000,%00000011,%10000000,%00000011,%

10000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000)


const GreenData(32)as byte =(%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000,%00000000,%00000011,%10000000,%00000011,%10000000,%00000011,%10000000,%00000000,%00000000,%

00000000,%00000000)


const BlueData(32) as byte =(%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000011,%10000000,%

00000011,%10000000,%00000011,%10000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%00000000,%

00000000,%00000000)

NOTE: The same image 16 x 16 presents different binary conversion.

I think there is a difference in the code between the 2 programs.

Brad thank you for your patience.

No problem, happy to help.

Could you also post you original image that you have been importing into the conversion programs?

Hi Brad,

Following image used to test 16 x 16.

Thank you

Sorry for the late reply, I have been quite busy these last few days!

Thanks for posting your image. I guess what I can say is that the latest version of my program is designed to allow you to have images that are either very wide or very tall and so this is why it has the option of scanning top to bottom or left to right.

It can also be quite handy in that it can allow you to scan in an image and have it drawn on whatever LED display you are using in just about any scanning technique that you are using to draw your image on the LEDs.

So I guess in your case, you just need to make sure that you select the left to right option

Hi Brad,

With the option left to right is OK! Does not work with the option of top-down.

Please give me a hint of what can be changed in the code for the option from the top to down.

Thank you

With the option left to right is OK! Does not work with the option of top-down.

Well it all depends on how you want your picture to be displayed, for your picture to display correctly with your circuitry, you need to use the left/right option BUT if your scanning technique for your circuit was different, you might need to use the top/bottom method instead.

So I guess what I am saying is that you will either select left/right OR top/bottom depending on which one of those suits your requirements

ORB11 wrote:hi Brad,

I'm working on a new project of a Christmas tree POV, and also with a new problem.
Know you've made ​​a POV with 32-bit image, it is so difficult to transform a data bus 8 bits sequentially for 32-bit.
Could you help me with example code in the PIC MCU and the basic hardware using 74HC373.

Thanks for any help Brad.

Now that is a very involved question! I can help you, but I wouldn't have the time to come up with a complete circuit and code for you

Let's start with this - I would recommend that you use some 74595 chips (rather than 74373 chips). It greatly simplifies your PCB design since you will be sending data in serial rather than parallel. As a starting point - check out my DigiPixel project schematic. This will give you a good idea as to how you can use the 74595's to send data through to multiple LED's

Hi Brad,

Thank you for feedback.

  I'll try to implement with the 74595, even not having much experience with this type of serial chip.

Thank you ...

Let me know how you go

How do you have the 74595's connected? are they cascaded together?

There is a MikroBasic Library for 74595 which supports upto four 74595's, you can find it here - MikroBasic shift register.
The Library Help File will explain how to use/install the Library into MikroBasic, read the Help File on the webpage,
it will also explain how to setup everything and send the data for all four shift registers, there is even circuit diagrams etc within the download.

Here is an example of connecting four 74595's

Excellent work bitfogav, that should certainly be a huge help for your project ORB, be sure to post back with your results!