the proposed probe only requires a five-layer PCB structure instead of a seven-layer PCB structure. A commercial high-frequency electromagnetic simulation software is used to design and simulate the ...

Sinclair Research was best known in the United States for the tiny ZX80, and the ZX81, under its Timex branding. However, they also made the ZX Spectrum which had many features that were — at ...

To start the process a blank PCB board is cut to the final board size. Photoresist Dry-Film is applied to one side of the board before it is put face down on the machine. The PCB design is ...