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Schematics don’t do you much good on today’s high-tech electronics. Most high-tech electronics nowadays use custom chips or FPGAs so a schematic that shows all the signals going in and out of a magic proprietary chip won’t do you any good.
A lot of lower-tech components that perhaps use discrete parts, relés, discrete resistors, etc. do have schematics on the inside of the case or available online.
consulte Mais informação: PCB Design
#PCB Design
I am getting a PCB manufactured for a project that I am working on. One of the parts, the A4950 motor driver, has a “almofada” on the bottom, which is meant to be soldered to GND of the PCB for thermal dissipation. I was thinking about the prototyping, and I am unsure how I would go about (using a soldering iron), soldering the pad on the bottom.
Normalmente usei switches RF para essa finalidade, mas foi também aí que foi necessário permitir que a seleção da antena fosse alterada “no campo”. Mas para os casos em que a seleção da antena é uma opção no momento da fabricação, Estou considerando resistores simples de zero ohm.
Eu projetei uma placa de fonte de alimentação usando V7805-2000. A espessura do cobre é 70 microns, o tamanho da placa é 5 centímetros × 5 cm. Quando este foi submetido a um teste de vibração, o regulador saiu, quebrado em dois pedaços(os cabos do regulador estão nos orifícios). Como vão as coisas?
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