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system that takes BCD inputs from DIP Switches and display Decimal on 7-Segment display, without using any BCD Decoder? Answered

hi i want to make system that takes BCD inputs from DIP Switches and display Decimal on two 7-Segment display, without using any BCD Decoder.what ic should i choose??and circuit.

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user
steveastrouk (author)2014-12-30

There are plenty of options. Your problem is that you have been told to use only an AND gate, and you need an inversion.

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iceng (author)2014-12-29

You can make a tripl-input AND gate from three dual-input NAND gates and

make a four-input NAND gate from from five dual-input NAND gates.

Make two duplicate sets for two Seven Segment Displays.

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iceng (author)2014-12-28

Use a BCD to Decimal IC gates 7445 and 50 1N5817 Diodes to decode ten to 7-Segment LED display see the circuit below.

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szafar2 (author)iceng2014-12-29

i have to make without using bcd to decimal ic,only 74LS11 but for two 7-segment display.

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iceng (author)szafar22014-12-29

Replace the 7445 with five dual 4input 7421 IC AND gates and

Three 7414 IC Hex Inverters

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user
steveastrouk (author)iceng2014-12-29

I spy with my little eye something beginning with "homew"

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rickharris (author)2014-12-29

Why? Manufacturers make the chips because doing it otherwise takes a lot of logic.

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szafar2 (author)rickharris2014-12-29

because its semester project.

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user
steveastrouk (author)2014-12-27

You can do it with discrete logic, and lots of it, there are plenty of on line references.

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szafar2 (author)steveastrouk2014-12-28

can you have any idea about which ic i use?i want to use 74LS11.

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user
steveastrouk (author)szafar22014-12-28

You need triple input NANDs or NORs

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