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

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

iceng2 years ago

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.

BCD7seg.bmp
iceng2 years ago

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

BCD-7Seg.bmp
szafar2 (author)  iceng2 years ago

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

iceng szafar22 years ago

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

Three 7414 IC Hex Inverters

BCD-Decimal.bmp

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

rickharris2 years ago

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

szafar2 (author)  rickharris2 years ago

because its semester project.

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

szafar2 (author)  steveastrouk2 years ago

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

You need triple input NANDs or NORs