Analog to Display

[StudentSA]

Hi all

I need a solution to the problem of displaying an analog voltage onto four 7segment displays. I need my voltage of 0 to 9.999V to display as 0 to 9999 on my display.

I had posted previously in this post :
Thread

but I have encounted numorous issues steming from the fact that the IC I intended to use is CMOS. This project of mines requires that I do not use microprocessors. Is there a TTL method of driving four 7seg displays to indicate an analog voltage?

Can someone who is still in touch with the "old school" (non micro) electronics understanding assist me.

Kind Regards,
StudentSA

 

[crutschow]

CMOS in not necessarily a microprocessor. There are many CMOS circuits that are just simple IC logic gates, no different than TTL expect for the logic levels.

 

[ericgibbs]

hi,
This would be an easy way, link
ICL7129 datasheet, Pinout ,application circuits 41/2 Digit Lcd, Single-chip A/d Converter Corporation

 

[StudentSA]

CMOS in not necessarily a microprocessor. There are many CMOS circuits that are just simple IC logic gates, no different than TTL expect for the logic levels.

Sorry, I meant that CMOS is a issue for me because all my other circuitory is TTL based. Also CMOS is now not so popular.

 

[ericgibbs]

Sorry, I meant that CMOS is a issue for me because all my other circuitory is TTL based. Also CMOS is now not so popular.

Hi,
There are a number of CMOS/TTL/CMOS buffers and inverter IC's available.
HEF 4050 and HEF4049

 

[StudentSA]

hi,
This would be an easy way, link
ICL7129 datasheet, Pinout ,application circuits 41/2 Digit Lcd, Single-chip A/d Converter Corporation

Just had a quick look. looks good, will look into it further later...

Where do you find these IC`s ?

Thanks

 

[ericgibbs]

Just had a quick look. looks good, will look into it further later...

Where do you find these IC`s ?

Thanks

Try here.
Google

Also this type
https://uk.farnell.com/jsp/search/b...4+digit+panel+meters&Ntx=mode+matchallpartial

 

[crutschow]

Sorry, I meant that CMOS is a issue for me because all my other circuitory is TTL based. Also CMOS is now not so popular.

TTL is even less popular.