64 GPIO input/output with 64 Blue LED

1. J16 Mini USB 5V input for GPIO pin10  V+

2. J18 Rs-Pi V2  GPIO output

3. JP18  GA0 ~ GA7   U13 Port A       JP19 GB0 ~ GB7     U13 Port B

4. JP25  AA0 ~ AA7   U14 Port A        JP24 BA0 ~ BA7     U14 Port B

5. JP20  GC0 ~ GC7   U15 Port A       JP21 GD0 ~ GD7     U15 Port B

6. JP22  DA0 ~ DA7   U16 Port A        JP23 EA0 ~ EA7     U16 Port B

7 R61,R62,R63  ( for U13 Address select A0,A1,A2 )

8. R64,R65,R66 ( for  U14 Address select  A0,A1,A2)

9 R80, R81,R82  ( for U15 Address select A0,A1,A2 )

10. R88,R89,R90 ( for  U16 Address select  A0,A1,A2)

11. U13 (20)  23017 -1  Port A,B      U14 (21)   23017-2 Port A,B

12. U15 (22)  23017 -3  Port A,B    U16 (23)   23017-4 Port A,B

                         23017-4 - 64 GPIO board plug in Raspberry Pi

        in i2cdetect  you can found 4 device in system (20,21,22,23)

       23017-4 plug in Raspberry Pi with our Rs-Pi 4Hub board    64 Blue LED "ON"