size small than Raspberry Pi with Multi-Function
Why Raspberry Pi
suggest you need use External USB Hub with power
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.
you can do
Rs-pi Fuse power circuit.
external USB Hub with power adapater
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
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 & SPI 23s17 -1 (16 GPIO) Board
Rs-Pi 7 Port USB hub 23x17-1 board plug-in
7hub 23x17-1 plug in Raspberry Pi with
16 GPIO LED "ON"
SPI 23s17 can control and detect by pi-face software.
our new output test program
23s17-1port-v100.py display all 16 GPIO
1. U15 SPI
23s17 16 GPIO
23s17 ; 23s17 ; 23s17 ; 23s17 Datasheet
2. U2 - USB 7 Ports HUB chipset
J1 (JP3) USB HUB upper
port signal input from Rs-Pi
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
can plug-in 5V in
4. J11 for RS-Pi V2 GPIO connector
(got 4 more GPIO pin)