Alt-BEAM Archive

Message #10067



To: beam@sgiblab.sgi.com
From: "Thomas Pilgaard" ascii@hum.auc.dk
Date: Fri, 11 Feb 2000 17:28:28 +0100
Subject: [alt-beam] Re: 74x240 question


Thanks :)

> -----Original Message-----
> From: owner-beam@sgiblab.sgi.com [mailto:owner-beam@sgiblab.sgi.com]On
> Behalf Of Bruce Robinson
> Sent: Friday, February 11, 2000 4:46 PM
> To: beam@sgiblab.sgi.com
> Subject: Re: 74x240 question
>
>
> Thomas Pilgaard wrote:
> >
> > Is there a difference between the HC and HCT types?
>
> They are essentially the same. The HCT family has inputs that are
> directly compatible with TTL logic (LS, ALS families), whereas the HC
> family needs to have pullup resistors when receiving signals from TTL
> logic.
>
> Normally this difference is irrelevant to us.
>
> Regards,
> Bruce
>



10068 Fri, 11 Feb 2000 11:02:02 -0600 [alt-beam] condenser mics "beam@sgiblab.sgi.com" Kelly Petriew I realize there are a few circuits out there that help our little
BEAMbots respond to sound, but could someone please direct me towards
one?

Are tiny condenser mics (found in computer microphones) good enough to
use? Would they be sensitive enough? I haven't actually checked to
resistance of one yet (I don't have a good ohmmeter at work)..

Thanks in advance

--
Kelly Petriew

Systems Support Analyst
The StarPhoenix
204 5th Avenue North
Saskatoon, Saskatchewan
Canada
S7K 2P1
306-664-8250 extension 569


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