Class 7: Assemble the PCB

Since the last class, we have finished the base for the PCB board. Certainly, there should be many components on the board. This class, we carefully assemble the components on the board and fix them by soldering tin. Finally, we will combine the PCB board with the audrino, if it blinks, which means it has realized the simplest function. Therefore ,a perfect PCB has been finished in the end.

Tools

    • Step1:list all the component you need

  • During the last class, we have made the base for the PCB board.However, if we want to use it to realize some functions , it is impossible to do it without th e circuit component. Thus, we need to list the components we need. The minor reason to list is that all components are very small, in case that we might miss something we need.

    In term of the yellow ticket above, we can see many different symbols of the circuit components such as the capacitor, resistor and so on. By matching all the components to its symbol, we can get the list in the second picture.

    • Step2:Solder these components on the board

  • Since we have all the components ready, we can solder the component on the board in term of the position on the tickets
  • Be careful to do this job, because if tin has spread out to somewhere it does not belong to, it will form a shortcut or open circuit, which leads a bug. Therefore, in order to detect this bug, we need to use multimeter to detect whether the circuit is OK.
  • The two picture above is the finished board. How beautiful it is!

    • Step3:Set the parameter for microcontroller.

  • The hardware part is done. Next, we need to use audrino to set some parameters to the microcontroller, which is actually very simple. We just need to connect the board on the computer, open the audrino in order to tell this microcontroller, your name is ATMGA328!The step is necessary, because the microcontoller needs to know what pin it has, the number of pins it has!
  • The final step is to test whether this board is working well. The easilest way is to apply program "blink" on the board! This is what you will get!
  • The green light is blink in reality, which means all the components on the board are running well!
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    Step4:Question

    Question

    In this board, we only has two output on it ,green LED and red LED, so what the most complicated function actually we can realize?

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