Lots of R/C time inputs

Archiver

I have a stamp application that needs more input than the stamp has.
I've done multiple inputs on 4 pins using a 74HC151, but... the
inputs I need on this project are all R/C time circuits. This doen't
seem to work with a 74HC151, I take it because I can't charge the R/C
circuit.

Is there another way to do this? I need at least 16 R/C circuits.

Thanks
Mike

Archiver

A PAK-IV will do RCTime on 16 channels (one at a time).

Regards,

Al Williams
AWC
http://www.al-williams.com/awce/pak3.htm


>

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Original Message

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> From: Mike Davey [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=NsrkdKzh3_yEh4GEBWiWCcobu7I2wVkf15BBZ2ZlLtnrjyJ114wWzmLjWnQnzHZcvZHkm1ms4XpaZTQ]mdavey@n...[/url
> Sent: Monday, July 09, 2001 8:16 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Lots of R/C time inputs
>
>
> I have a stamp application that needs more input than the stamp has.
> I've done multiple inputs on 4 pins using a 74HC151, but... the
> inputs I need on this project are all R/C time circuits. This doen't
> seem to work with a 74HC151, I take it because I can't charge the R/C
> circuit.
>
> Is there another way to do this? I need at least 16 R/C circuits.
>
> Thanks
> Mike
>
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>

Archiver

>I have a stamp application that needs more input than the stamp has.
>I've done multiple inputs on 4 pins using a 74HC151, but... the
>inputs I need on this project are all R/C time circuits. This doen't
>seem to work with a 74HC151, I take it because I can't charge the R/C
>circuit.
>
>Is there another way to do this? I need at least 16 R/C circuits.

If you're looking for bidirectional 8x1 analog multiplexers, take a look at
the 74HC4051 and CD4051...

Mike Hardwick, for Decade Engineering -- <http://www.decadenet.com>
Manufacturer of the famous BOB-II Serial Video Text Display Module!