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项目作者： WildfootW

项目描述 ：
A PCB design Homework
高级语言： Game Maker Language
项目地址: git://github.com/WildfootW/NTU-BEM_Homework-A_Node-PCB.git
创建时间： 2020-10-23T18:31:55Z
项目社区：https://github.com/WildfootW/NTU-BEM_Homework-A_Node-PCB
开源协议：
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NTU-BEM-Lab Homework-A PCB


Todoist

  • Replace Power Connector
  • Replace all SMT to 0603
  • Digital Vcc Decoupling Capacitor
  • Buck Converter LM2576 LM2596 LM1117
  • Analog Avcc Decoupling Capacitor
  • Light Sensor
  • Add PhotoCell
  • Add Border on PCB
  • Change DHT22 to Header
  • Add Screw Hole
  • Add Test LED

Componenet

Reference

Libraries

Component Considerations

ATmega328P

  • Electrical Engineering - What is the minimal set of parts for a circut with this AVR microcontroller?

  • AVR® Microcontroller Hardware Design Considerations

    • 2.1 Ditital Supply
      • Put decoupling capacitors near IC
      • For devices with multiple pairs of power and ground pins, it is essential that there is a decoupling capacitor for every pair of pins.
    • 2.2 Analog Supply
      • Avcc ensures the analog circuits are less prone to the digital noise
      • AREF must also be decoupled. The typical value is 100 nF
      • If a separate AGND is present, the ground should be separated from digital ground. (analog & digital grounds are connected only at power supply GND)
    • 3 Connection of RESET Pin on AVR Devices
      • The recommended pull-up resistor value is 4.7 kΩ (For DebugWIRE to function properly, the pull-up must not be less than 10 kΩ)
      • Using an extra capacitor is an additional protection. (cannot be used when DebugWIRE or PDI is used)
      • Recommend add an ESD protection diode (cannot work with HVPP). Alternatively, a Zener diode can be used to limit the Reset voltage relative to GND (highly recommended in noisy environments).
    • 3.1 External RESET Switch
      • It is important to add a series resistance (330R)
    • 4.1 SPI Programming Interface
      • A few ISP programmers are powered by the target power supply. In this way they easily adapt to the correct voltage level of the target board.
      • Other ISP programmers, such as STK600, can alternatively power the target board via the VTG line. In such a case, it is important that the power supply on the target is not switched on.

  • Crystal Oscaillator 16MHz

    • Table 8.3 - 12-22 pF
  • debugWIRE
  • Serial Interface

Others Considerations

SMD / SMT