internal 4 Ports USB HUB & Multi-function I2C Board for Raspberry Pi
(RTC, Temperature Sensor, D/A , 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). F
or the Rs-Pi V2 no need for this input.
Raspberry Pi internal 4 Ports USB HUB & Multi-function I2C Board
(RTC, Temperature Sensor, D/A , EEPROM)
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 demo 9 bit output sinewave.py at address "60"
mcp4725 demo sinewave.py result
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. 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 use USB device need more power, then you can plug-in 5V in this port.
8. J11 for RS-Pi V2 GPIO connector (got 4 more GPIO pin)
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Adafruit
Occidentalis v0.2
image support the TMP102 and RTC DS1307 Adafruit Occidentalis v0.2 image support the TMP102 and 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,tmp102, mcp4725,24c32) 2. 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) 3. Rs-Pi USB Hub with ( ds1307,tmp102, mcp4725,24c32, mcp23008, 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 | ||
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