32 GPIO output with 32 Blue LED

                                                      Can work with our Rs-Pi-USB Hub Board

                                                                  i2c  detect  status

   20  -> MCP23008        48  -> tmp102      50  -> 24c32       60    ->  MCP4725     68 -> RTC DS1307

   21 , 22 -> 23017 x2

                                         use 23017-21.py  set each bit to be High or Low

Download sample program 

 led-21.py   led-22.py  23017-21.py  23017-22.py

1. J16 Mini USB 5V input

2. J18 Rs-Pi V2  GPIO output

3. JP5  GA0 ~ GA7   U13 Port A      JP2 AA0 ~ AA7     U13 Port B

4 JP7  BA0 ~ BA7   U14 Port A    . JP6 GB0 ~ BG7     U14 Port B

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

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

7. U13 (21)  23017 -1  Port A,B            23017 Datasheet

8. U14 (22)   23017-2 Port A,B

9.JP8 jumper select use external 5V from Mini USB connect(J16) or internal 5V from Rs-Pi

A0, A1, A2 address 

 *  right side GND low - 0      * left side Vcc High - 1

 000     -     20              001     -     21              010     -     22         011     -     23     

 100     -     24               101    -      25             110    -      26         111    -      27

                                                      23017 x2 32bit output -  32 LED

                        Can plug-in our Rs-Pi-RS232 console cable together with Rs-Pi-USB Hub board