Rs-Pi internal 4 Ports USB HUB & RTC Board for Raspberry Pi

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). F
or the Rs-Pi V2 no need for this input.





Raspberry Pi internal 4 Ports USB HUB & RTC Board





                    i2c  detect  status

       68 -> RTC DS1307

                                     




 
             Can plug-in our Rs-Pi RS232 console cable with this USB HUB board
 
                               USB Hub LED   --   4 USB device plug-in four Ports
         
  1. U8 RTC DS1307 with CR1220 Battery

2.  U2 - USB 4 Ports HUB chipset, J1 (JP3)  USB HUB upper port signal input from Rs-Pi

3. J13  Mini USB 5V input for USB HUB, you don't need plug 5V , the HUB already use 5V from Raspberry Pi, 

 if your use USB device need more power, then you can plug-in 5V in this port.

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


Full Support by our Pi_Scratch software can be very easy control by Scratch

Pi_Scratch detail    Scratch driver software 

 (2) i2c address  68  DS1307   RTC detect  & demo  

after broadcast "Update"   in Sensing --> Slider , you will see the RTC  in the list 

 "Year, Month, Day, Date, Hour, Minutes, seconds"

 

RTC information  from Raspberry Pi  i2c RTC  module

 

if you can't detect RTC function in Scratch

you have echo ds1307  in   /etc/rc.local 

 

          in 0x68 address display "UU"  

 

send    broadcast"rtc"   then broadcast"update"

after broadcast "Update"   in Sensing --> Slider , you will see the RTC  in the list

"Year, Month, Day, Date, Hour, Minutes, seconds"

               

 
Adafruit Occidentalis v0.2 image support the RTC DS1307 

Use this board you can learn how to program use "C" or  "Python" , Will provide sample program for test can download from our web site.

also this Rs-Pi USb Hub board have 4 different Ver, all different function and different price, all with short pin Ver, please send email to us, if you are interesting.

1. Rs-Pi USB Hub with ( ds1307)
2. Rs-Pi USB Hub with ( ds1307,tmp102, mcp4725,24c32)
3. Rs-Pi USB Hub with ( ds1307,tmp102, mcp4725,24c32, ft232RL)  - with USB to TTL (just need one USB cable plug-in your PC and Rs-Pi)
4  Rs-Pi USB Hub with ( ds1307,tmp102, mcp4725,ads1015, 24c32, mcp23008, ft232RL, zt3243) 
     with USB to RS232 (DB9 full 9pin RS232 COM port output) or USB to TTL console port
    

Package Content

1x  Rs-Pi 4 USB HUB & RTC board
1x  USB to MINI USB hub input cable
1x CR1220 3V Battery
1x  Manual 


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