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Expansion boards, daughter cards and evaluation boards are products that are widely used in the electronic engineering applications. The purpose of these boards is to enable engineers to quickly explore multiple possibilities when designing a prototype system or product. The boards are designed in such a way that they can be easily and quickly integrated into existing systems, as well as providing added functionality or processing power when needed.

Expansion boards are typically single unit boards or arrays of boards that are either designed to be used standalone or connected directly to a mother board. The board is typically divided into sections and uses standardized connectors for attachment. Each section may have one or more custom chips or ICs designed specifically for the board, as well as off-the-shelf components. Expansion boards are typically intended to be used for a specific purpose that is not available from the mother board or for providing extra I/O capability.

Daughter cards are boards that are connected directly to a mother board and each of the daughter cards has a separate purpose. The boards are typically designed in such a way that allows them to be quickly integrated with other boards and connected to the mother board. Some daughter cards provide digital I/O, while others may provide an analog input. Daughter cards are ideal for providing functionality to a design where space is a premium, as they can be easilyly integrated without the need for extra circuitry.

Evaluation boards are boards designed to connect with a processor or microcontroller, such as the one on a mother board. The evaluation board enables engineers to quickly evaluate and modify the design of the system without having to create a new board. Evaluation boards are designed for specific applications and include all the necessary circuitry needed to develop and debug a prototype board. Examples of applications that evaluation boards are used for include control systems, communication systems, power systems, and motor control.

In summary, expansion boards, daughter cards and evaluation boards are three distinct types of products that are used when designing electronic systems and products. Each type of board has its own unique purpose and helps to facilitate the design process. Expansion boards are used for providing extra I/O capability, while daughter cards are used for providing specific functionality that may not be available on the mother board. Finally, evaluation boards are used for developing and debugging prototype designs. All three types of boards are an invaluable tool for engineers when designing complex systems and products.

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