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author: Oldrich Pecak
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# Combinatorial logic I

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## Seminar goals

- understand different representations of logic
- transfer between them
- build basic circuits from 74xxx logic

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## Combinatorial circuits

- most basic form of logic circuits
- stateless

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## Representations

- 4 major representations

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## Representations

- 4 major representations
- mathematical formula
- truth table
- karnaugh map
- schematic

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## Changing representations

- usually quite simple and straight forward
- various representations are useful for different things

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## Building circuits

- correct representation helps
- not all gate combinations are possible

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## 74xxx series logic

- most common logic circuits
- started as TTL logic
- nowadays many different types
- datasheets are your friend

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## Few tips for building with 74xx

- do not leave the inputs floating
- ground yourself, ESD can destroy circuits
- 74xxx can't drive LEDs very well

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