Alt-BEAM Archive
Message #05333
To: 'beam@sgiblab.sgi.com' beam@sgiblab.sgi.com
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Wednesday, 21 July 1999 9:27
Subject: RE: MPNC was AUTOMATIC PNC
>So the short answer is yes. It is safe to hook all 4 reverse circuits to a
>single switch. But.... it is not likely the most efficient solution. If you
>plan to enter Chiu's contest then don't give too much detail away. But here
>is a generic question: Are you using these 4 reversers with single master
>multiple slave bicores? Have you considered James Wilson's suggestion of
>using XOR (74HC86) gates?
>
>regards
>
> Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> tel: (604)590-7493
> fax: (604)590-3411
>
>> -----Original Message-----
>> From: David Perry [SMTP:davidperry@geocities.com]
>> Sent: Monday, July 19, 1999 3:17 AM
>> To: beam@sgiblab.sgi.com
>> Subject: Re: MPNC was AUTOMATIC PNC
>>
>> the 74hc240 on ians site, has two switches per chip, and i'm using 2
>> chips,
>> 4 switches
>>
>> -----Original Message-----
>> From: Wilf Rigter
>> To: 'beam@sgiblab.sgi.com'
>> Date: Tuesday, 20 July 1999 6:11
>> Subject: RE: MPNC was AUTOMATIC PNC
>>
>>
>> >David,
>> >
>> >take a moment to write down what you want to do with the reverse
circuit.
>> I
>> >understand that you want to combine 4 reverse switches into 1 and
>> wondered
>> >what would happen . But the question is: Where did those 4 switches come
>> >from? Are you using a standard circuit repeated 4 times? What circuit?
>> >
>> >regards
>> >
>> > Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
>> > tel: (604)590-7493
>> > fax: (604)590-3411
>> >
>> >> -----Original Message-----
>> >> From: David Perry [SMTP:davidperry@geocities.com]
>> >> Sent: Sunday, July 18, 1999 10:57 AM
>> >> To: beam@sgiblab.sgi.com
>> >> Subject: Re: MPNC was AUTOMATIC PNC
>> >>
>> >> damn it why is it so quiet!!!!!!!
>> >> i can't see how that would work, you'd need to apply ground to each of
>> the
>> >> switches. oh come on, please help, are you trying to sobotage my robot
>> >> building or what? :-)
>> >>
>> >> David Perry
>> >>
>> >> -----Original Message-----
>> >> From: James Wilson
>> >> To: beam@sgiblab.sgi.com
>> >> Date: Monday, 19 July 1999 6:37
>> >> Subject: Re: MPNC was AUTOMATIC PNC
>> >>
>> >>
>> >> >Have you thought about an exclusive or gate? or an or gate? I think
>> it
>> >> is
>> >> >possible to make the gate you want by using inverters and a voltage
>> >> detector
>> >> >(things the beamer may already have in his bag of tricks)
>> >> >
>> >> >James :-))
>> >> >----- Original Message -----
>> >> >From: David Perry
>> >> >To:
>> >> >Sent: Saturday, July 17, 1999 1:11 PM
>> >> >Subject: Re: MPNC was AUTOMATIC PNC
>> >> >
>> >> >
>> >> >> holy crap! you have revolutionised the microcore!!!!!!!!!
>> >> >> It will be the end of the traditional microcore and PNC as we know
>> >> it!!!!
>> >> >> damn, to late to implement into my caterpillerBot.
>> >> >>
>> >> >> One question while i'm at it, i am using 2x 74hc240 to reverse my
>> new
>> >> bot,
>> >> >> but it has 4 reverse switches when i only want one. is it safe to
>> hook
>> >> >them
>> >> >> all up ?
>> >> >>
>> >> >> David Perry
>> >>
>> > ----8<---
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