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)
