7 segments project

[hydrid]

any idea what project using 7 segments display?
or any idea how to make a project that when you press 1, 2,3,4,5,6,7,8 9,0 it displays the equivalent binary code to the four 7 segments display?
i you have, please post the schematic diagram?

 

[Almazick]

The easiest way to do it by Microchip for example Pic 16f676 or any other chip would work.

 

[ericgibbs]

hi hydrid,

Two semi-conductor devices you should look at are the,

SN74LS147, Decimal to BCD convertor and the SN7447, BCD to 7 segment driver.

You will also require a +5v psu, push switches and a 7 seg LED, etc.

EricG

For interest, also look at the SN74144

 

[AllVol]

when you press 1, 2,3,4,5,6,7,8 9,0 it displays the equivalent binary code to the four 7 segments display?

If I understand correctly, you want to display the four bits that make up the binary code for each number, i.e., 0001, 0011,0010, etc. For that, you need an LED to show each bit. A 7-segment will not suffice.

I am attaching a circuit that runs through the numbers 0 to 9, displays the code for each, then repeats. You can replace the 555 timer with a bounceless switch to give individual counts, (still 0 to 9 in order), or, attach a keyboard and other circuitry to give a reply on demand. The latter is a bit complex, however. Start with just the basic circuit until you understand binary.

Edit: If you undertake this project, be SURE you line up the leds in the order shown or you will have one confusing mess!!!

 

[hydrid]

thanks..ill try that binary counter..
if theres more suggestion.. that will be more fine..