Raspberry Pi - USB Hub & I2C with USB-to-TTL -Console - Lite  Board

 Why Raspberry Pi suggest you need use External USB Hub with power Adapter? 
 because they design use 140mA fuse in each USB port, "140mA", 
 but USB spec need 500mA for each port,
 that's why lots people have power issue for USB port.
 in Rs-pi V2 they remove the Fuse design, and yo don't have any protect from Rs-Pi USB port.
 What  you can do ? 
  1. modify Rs-pi Fuse power circuit.  

2. Use external USB Hub with power adapater 

Our RS-Pi internal USB hub with 1.5A polyswitch fuse and use USB signal (D+, D-) from Rs-pi only, 

not use power from USB portand use Raspberry Pi 5V from P1 pin2 , so if you have good quality "more than 1.2A"

 DC 5V adapter , then you can use our Rs-Pi USB hub no problem.

 if your device need more power, we also can provide extra 5V input(J13 mini USB B).
The Rs-Pi V1 board  if you not modify the fuse circuit, you may need plug in extra Dc 5V from

(J13 mini USB B), for the Rs-Pi V2 no need for this input.





Raspberry Pi - USB Hub & I2C with USB-to-TTL -Console - Lite Board 








                                                                  i2c  detect  status

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


                       use eeprog 0.7.6 can read/write  for  24c32 or 24cxx


     MCP4725 12bit Digital-to-Analog Converter 
*     demo  9 bit   output  sinewave.py    at address "60"


   *   MCP4725 demo  9 bit   sinewave.py    at address "60"


                              mcp4725  demo sinewave.py   result; result


1. U8 RTC DS1307 with CR1220 Battery

2. U7 TMP102 Temperature Sensor

3. U9 24C32  32Kbit  EEPROM

4. U6 MCP4725 12bit Digital-to-Analog Converter , JP11 (AOUT, GND)  JP1 Disable Jumper

5, J5 (5V, GND,SCL,SDL) J6(3v3,GND,SCL,SDL)  I2C output

6  U2 - USB 4 Ports HUB chipset

     J1 (JP3)  USB HUB upper port signal input from Rs-Pi

7.  J13  Mini USB 5V input for USB HUB, you don't need plug 5V , the HUB already use 5V from Raspberry Pi, if your USB device need more power, then you can plug-in 5V in this port.

8. U10 FT232RL    J4 USB input from PC for USB to RS232 console port, just connect a cable (5pin mini USB-B  to A USB ) then you have this console function.

9. J11  for RS-Pi V2 GPIO connector (got 4 more GPIO pin)


  Adafruit Occidentalis v0.2 image support the TMP102 and RTC DS1307 ,  MCP4725


Download sample program     

                               USB Hub LED   --  4 USB device plug-in four USB Ports


Package Content

  1x Rs-Pi USB HUB & I2C w/ USB console board

1x  USB to MINI USB hub input cable

1x CR1220 3V Battery
1x Manual 



Raspberry Pi



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