My first shield back,Integrates a variety of sensors.

Discussion in 'Embedded Systems and Microcontrollers' started by dreamtale, Nov 17, 2014.

  1. dreamtale

    Thread Starter New Member

    Oct 30, 2014
    24
    1
    I had received a lot of advice.They point out my mistakes to help me improve.I am very grateful to them.After a modification over time, I sent my gerber files 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.
    QQ20141118095422.jpg 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.
    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.
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    PCB board quality is very good, I designed a small PCB silk screen. It's clear.I recommend Smart-prototyping, Especially its online online quote system is very convenient, as long as you enter the dimensions and other requirements, the site can calculate the quote.
    After I received my element, I will test each module. I will share my code.
     
  2. dreamtale

    Thread Starter New Member

    Oct 30, 2014
    24
    1
    Unfortunately, after I finished my first piece of solder PCB, I found that I using the wrong solder paste.
     
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