Search found 34 matches

by jianzhang.su
Fri Mar 25, 2016 10:41 am
Forum: RePhone
Topic: (TECH) Mute lineout when no sound
Replies: 1
Views: 1113

Re: (TECH) Mute lineout when no sound

Hi,
You just connect the AU_HPL(which mean audio_headphone_left_channel) to the amplifier? I think may be the circuit lack of some filter circuit, especially the blocking capacitors. May be you can reference to the headphone circuit of LinkIt One, add some filter before you connect the amplifier.
by jianzhang.su
Fri Mar 25, 2016 9:56 am
Forum: Wearables
Topic: How to interface Xadow IMU 6DOF with Linkit Assist 2502
Replies: 5
Views: 6623

Re: How to interface Xadow IMU 6DOF with Linkit Assist 2502

Here is the picture for my hardware connection, and the Monitor output.
by jianzhang.su
Thu Mar 17, 2016 4:53 pm
Forum: RePhone
Topic: (TECH) Using Linkit ONE with RePhone Core
Replies: 2
Views: 1467

Re: (TECH) Using Linkit ONE with RePhone Core

Linkit ONE is the same chipset as the Rephone, but it is totally different between their firmware, and the hardware is not the same too. For example, the Linkit ONE use SIM1, but Rephone use SIM2, so I don't think Arduino IDE for Linkit ONE can compile VXPs for the Rephone.
by jianzhang.su
Thu Mar 17, 2016 2:30 pm
Forum: RePhone
Topic: (TECH) Power on when charging
Replies: 2
Views: 2023

Re: (TECH) Power on when charging

Yes, it's a problem, but the action of initialize the USB is fixed in the firmware, I can't find any API about this problem. Maybe we must wait for MTK to update the firmware :cry:
by jianzhang.su
Wed Mar 16, 2016 3:44 pm
Forum: Wearables
Topic: How to interface Xadow IMU 6DOF with Linkit Assist 2502
Replies: 5
Views: 6623

Re: How to interface Xadow IMU 6DOF with Linkit Assist 2502

Hi,
I don't have the Xadow IMU 6DOF, but I have the Xadow 3-Axis accelerometer, and I have test the Xadow interface with the accelerometer. Here is my test Program. The Program read the sensor's ID every sencond, and it's fine. Maybe the test program can help you. :D
by jianzhang.su
Thu Mar 10, 2016 6:11 pm
Forum: RePhone
Topic: (TECH) Touchscreen lost calibration
Replies: 2
Views: 1903

Re: (TECH) Touchscreen lost calibration

Maybe something wrong with the hardware of touchscreen. I think in this situation, maybe you can contact their customer service for help.
order@seeed.cc
by jianzhang.su
Tue Mar 08, 2016 4:38 pm
Forum: Wearables
Topic: How to interface Xadow IMU 6DOF with Linkit Assist 2502
Replies: 5
Views: 6623

Re: How to interface Xadow IMU 6DOF with Linkit Assist 2502

I have found that the I2C interface of Linkit Assist 2502 have no pull-up resistance, may be you can try to soldering two 4.7K resistances between the I2C interface and 2.8V power.
by jianzhang.su
Tue Mar 08, 2016 3:54 pm
Forum: RePhone
Topic: Xadow GPS v2 Returning 0 for both LAT and Long
Replies: 4
Views: 2742

Re: Xadow GPS v2 Returning 0 for both LAT and Long

Hello, bleusr
Could you post your picture of GPS module in here?
by jianzhang.su
Wed Mar 02, 2016 4:05 pm
Forum: RePhone
Topic: (TECH) Minimal power suply
Replies: 3
Views: 1363

Re: (TECH) Minimal power suply

It just restart when you make a call?? or it restart when there is no SIM?
by jianzhang.su
Thu Feb 25, 2016 10:18 am
Forum: RePhone
Topic: (Tech) USB broke off... fix?
Replies: 4
Views: 1257

Re: (Tech) USB broke off... fix?

er......
As far as know, all the metal fields of the USB port is ground except the five line.
May be the eagle files can help you
http://www.seeedstudio.com/wiki/images/ ... %2BBLE.rar