Chineese led diaplay boards

[codename25]

Hi,
I would like to know how these Chinese led sign board is made.
1. How many rows of shift registers are used in a led board.?
2. Whether I can connect ONBON LED CONTROLLER with my home made led board with one set row of shift registers?

Thank you.

 

[paulfjujo]

hello,


give some reference !
or datasheet link ?

 

[codename25]

Chineese led display board link:

http://wap.ebay.com/Pages/ViewItem....isplay-Screen-F3-75-Module-Good-/171504962659

Onbon led controller link:

http://www.aliexpress.com/store/product/led-sign-controller-BX-5UT/716499_727355395.html

 

[schmitt trigger]

For these instances, where the information is very scarce, the best approach is to contact the vendor or vendors directly, and ask the exact same question.

 

[deniah]

I do not know for RGB model, but for single color 16 x 32 dot chinese led modul there is 16 pcs of 74hc595 (1/4 refresh). Each panel have 74hc245 buffer on data, clk, latch and enable line. There is one NOT gate, i think on enable line, hc138 decoder and 8 pcs dual p-channel fet transistors in SOP8 package for driving rows

 

[codename25]

Thank you deniah, I have a doubt why they use 74HC245? Also why for 16 rows only 8 pcs of get transistor is used?

 

[wavelet1208]

1.The 74HC245 used to filter,Signal amplification.
2.Maybe there has two channel rgb signal,so just need 8pcs

 

[deniah]

There is actually two fets in one SOP8 package. Search for FDS4953 datasheet.