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 |
|
|
