I designed a shield,can be directly plugded into the arduino.Above it contains a complete gesture systems.such as MPU6050,HMC5883 and some other modules.
Long time ago, I just want to design a shield contains many sensors, which can achieve a lot of features. I realized.
http://api.ning.com/files/rkFK1BYzsGgwH … ?width=750
After a modification over time, I sent my gerber files to [Smart Prototyping and production. I changed a lot, I was going to use PCF2129 replacement DS1307, but PCF2129 is expensive so I had to give up.I also modified schematic.
I had made a serious mistake, because avr328 output is 5V, but many modules work in 3.3V. If the direct connection, it may cause some unexpected problems. In the end, I had to drastically modify my schematic.I use the relevant characteristics of the NMOS.I made a simple level conversion circuit to make sure the system compatible with 5V and 3.3V.
http://api.ning.com/files/rkFK1BYzsGhPj … ?width=700
http://api.ning.com/files/rkFK1BYzsGhZH … ?width=700
http://api.ning.com/files/rkFK1BYzsGjhc … ?width=700
In addition, according to the recommendation of some friends, I added MPU6050 as an acceleration sensor and an acceleration sensor. Now I have a complete PCB board 9-axis motion chip, it can know your stance and direction.
Many times, some projects need to use an SD card to store some parameters or some other data, I integrated the MicroSD card on the shield,I also set up a separate power jumper cap for each module, so that you can turn off some of the features when you does not require the use of certain modules.](PCB Prototyping | 100201 | PCB by www.smart-prototyping.com)