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TINA Design Suite is a powerful circuit simulation package for analyzing, designing, and real time testing of analog, digital, VHDL, MCU, SMPS, RF, communication, optoelectronic and mixed electronic circuits and their PCB layouts.

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Electronic circuit simulation for the Mac, support and downloads site.

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Ask questions, share knowledge, explore ideas, and help solve problems with fellow engineers.

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A library of over 500,000 free and free-to-try software programs for Windows, Unix/Linux, Mac, Mobile Phones, Games and Drivers and an up-to-date news and reviews section focused on IT subjects

Membrane Switch Design and Printed Circuit Board Assembly Including Membrane Keypad Touch Switch Flex Circuit Tactile Switch Membrane Keyboard and Printed Circuit Board Design.