Raspberry Pi - 7 Ports USB Hub & I2C Board


 Raspberry Pi  7 Ports USB Hub & AD/DA  Board


(RTC-DS1307, Temperature Sensor-TMP102, D/A ,A/D , 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 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 internal 7 Ports USB Hub & AD/DA Multi-function I2C Board

(RTC-DS1307, Temperature Sensor-TMP102, D/A ,A/D , EEPROM)








                                 Rs-Pi 7 Port USB Hub AD/DA Board plug-in Raspberry Pi




                                      i2c Bus Detect  Status

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

   60    ->  MCP4725     49-> ADS1015     



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. U6 MCP4725 12bit Digital-to-Analog Converter ,    Datasheet

    JP11 (AOUT, GND)  JP1 Disable Jumper

5. U11 ADS1015 12bit  Analog-to-Digital Converter ,   Datasheet

   J7 INPUT (AIN0, AIN1,AIN2,AIN3,GND,3V3)       JP12 Disable Jumper

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

7.  U2 - USB 7 Ports HUB chipset

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

8.  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 5V in this port.

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


  Adafruit Occidentalis v0.2 image support the

  TMP102 and RTC DS1307 , ADS1015 , MCP4725



Package Content

  1x Rs-Pi 7 USB HUB & I2C AD/DA  board

1x USB to MINI USB hub input cable

1x CR1220 3V Battery
1x Manual 



Raspberry Pi



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