Looks like PIC is famous in saving the home appliance.
:) Thinking what else should I use PIC for at home.

John

--- Byron A Jeff <byron@cc.gatech.edu> wrote:

> > kravnus wolf kravnus@yahoo.com wrote:
> > 
> > 
> >Out of curiosity, how many home projects(used
> >everyday) did you use
> >PIC for?
> 
> I have three so far:
> 
> 1) A 16F84 based basement light controller. It auto
> turns on the lights when
> the basement door is opened and leaves them on about
> 90 seconds after the
> door is closed. The unfinished basement has pull
> string lights and this
> project eliminates the need to keep a light on down
> there.
> 
> 2) My sunrise/sunset outdoor light controller. My
> wife likes the outside 
> lights on at night for security. It used to be my
> job to to turn them on
> at night and off in the morning. The controller now
> does this by using
> an embedded table of sunrise and sunset times from
> the beginning of each
> month. It then interpolates the sunrise and sunset
> time based on the day
> of the month and the fixed sunrise/sunset values
> from the tables. For
> simplicity I used 32 day months, so the turn on turn
> off times are 
> approximate. It has a lot of interesting features:
> 
> - It uses a pot/switch interface from a scrapped
> light dimmer for data
>   entry.
> - It has a battery backup so that the time is
> retained during a power outage.
> - It uses a 32 khz watch crystal for timing. It
> doesn't work too very well
>   in the unconditioned basement space where the
> project is located. I 
>   implemented a cheap corrector using a $2 wall
> clock and a LED interruptor,
>   but I couldn't get it stable.
> 
> Eventually I'd like to do some updates. The
> pot/switch interface has too much
> bounce which causes difficulty in setting the
> date/time. I'd switch to using
> like power for tracking time too.
> 
> 3) My homebuilt thermostat has saved me a bunch of
> money. I finally figured
> out that family will fiddle with the thermostat. My
> thermostat has no input
> interface. It kicks on the AC at 77F and the heater
> at 71F. Also it runs the
> unit in 12 minute intervals. The long run times go a
> long way to keeping
> the space comfortable.
> 
> BAJ
> -- 
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