4 bit multiplexer circuit with Proteus
전자계산기기능사
attached files
- 4 bit multiplexer 공개 문제
- 4 bit multiplexer circuit with Proteus
1. S-SW off :
- NAND gate always H(1) = VCC
- upper led group - 4 led changed from 0 to 9 by 74LS90 outputs
- lower led group - 점등
1. S-SW on :
- NAND gate always L(0) = GND
- upper led group - 점등
- lower led group - 4 led changed from 0 to 9 by 74LS90 outputs
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