Raspberry Pi - 7 USB Hub & I2C Board


Raspberry Pi internal 7 Ports USB Hub &

Multi-function I2C Board

(RTC-DS1307, Temperature Sensor-TMP102, EEPROM, )

 size small than Raspberry Pi with Multi-Function

 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 port and 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.











   for Rs-Pi V1  i2c in bus 0  

" i2cdetect -y 0 "  for i2c bus scan 

                                                                  i2c Bus Detect  Status

    48  -> TMP102       68 -> RTC DS1307        50  -> 24c32       


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



Spec Detail

1. U8 RTC DS1307 with CR2032 Battery    Datasheet

2. U7 TMP102 Temperature Sensor      Datasheet

3. U9 24C32  32Kbit  EEPROM    JP10 Disable Jumper     Datasheet

4, J5 (5V, GND,SCL,SDA)  I2C device input with logic level converter

5.  U2 - USB 7 Ports HUB chipset

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

6.  J13  Mini USB 5V input for USB Hub, you don't need plug 5V , the USB Hub

    already use 5V  from Raspberry Pi (P1 pin2), if your USB device need

   more power, you can plug-in DC5V in this port.

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




Package Content

  1x Rs-Pi 7 USB HUB & I2C board

1x USB to MINI USB hub input cable

1x CR1220 3V Battery
1x Manual 



Raspberry Pi



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