On Tue, 2 Jul 2002, Russell McMahon wrote:

>> > is it possible to demodulate a 38khz signal to get data using discretes
>> and
>> > logics?
>>
>> Of course, preferably done with vacuum tubes.  You can also grow your own
>> wheat and bake and slice your own bread.
>
>Olin is of course right - you can. Just as some people do prefer to bake
>their own bread and / or grow their own wheat even though easier
>alternatives exist. Apart from the sense of satisfaction gained there can be
>other benefits. Leaving aside the benefits of home grown wheat, as Jinx
>notes, there can be reasons to "roll your own". Low power consumption would
>be one such reason - a homebuilt detector could be designed to operate in a
>sampling mode with the electronics powered down for most of the time. I see
>no reason why the 3 mA or so typical idle current could not be reduced to
>100 uA or less. The signals sent may need to be adapted to suit the
>potential for loss of data at the start of a data burst. Other possible
>reasons might be very high or very low bandwidth or high sensitivity or
>..... . Or perhaps the pleasure some feel when they see the valve filaments
>light up :-).

I always thought the real preasure comes from lighting the *anodes* ? ;-)

Peter

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads