Recent content by guola

  1. guola

    Hello,

    I'm glad to join in here.
  2. guola

    Climb mountain

    I like to climb mountain because I can feel I'm alive when I was climbed mountain.
  3. guola

    How to choose PCB manufacturing technology/factory?

    Hi,I have sent some PCB designs to factories for prototyping. The price, however, varies greatly. Some ask 200USD for a four-layer 5cm*10cm PCB prototyping. While some only ask for 50USD. I assume that there are differences between these two factories. However, I could not find the differences...
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