[Noisebridge-discuss] Timer to turn off the buzzer

tedward arbzed at gmail.com
Sat Feb 11 22:51:31 PST 2012


Thanks for this info, Ray.

I guess with such a timer and a 110V-controlled relay you wouldn't really
need the Arduino at all.  Just wire the output end of the relay right in to
the buzzer circuit.  The off-the-shelf timer would present a nice user
interface if anyone wanted to adjust the buzzer's operating hours.
 KISS-compliant!

On Fri, Feb 10, 2012 at 12:51 PM, Ray <waywardengineer at gmail.com> wrote:

> How I did the arduino-RTC interface on the Boxshop alarm system was
> pretty easy: I got a programmable digital timer meant to turn a light
> or whatever at the set time. I then just connected a relay with a 110V
> coil, and on the other end of the relay is a 5V signal that goes into
> the Arduino. Sort of the opposite of how you'd use a normal relay.
> It's universal for any of those timers and has worked troublefree for
> years now!
>
> On Thu, Feb 9, 2012 at 4:55 PM, tedward <arbzed at gmail.com> wrote:
> > On Thu, Feb 9, 2012 at 3:20 PM, jim <jim at well.com> wrote:
> >>
> >>
> >> -1   ; how to make this happen? the nightly human
> >>     ; or some erlang program on pony? or...?
> >>     ; neither seems trustworthy, but i'm open
> >>     ; to any ideas.
> >
> >
> > erlang?  NOOOOOO!
> >
> > There are lots of possible solutions that would not require server
> uptime or
> > network access.
> >
> > A technically simple solution would be a hacked appliance timer.
> >
> > Another solution would be an Arduino coupled to a latching relay and an
> > accurate time source.  I mention that because  I need to learn how to
> > interface an arduino with an RTC for a different project I'm working on
> > anyway, so I'd be willing to implement that one if there is some support
> for
> > the concept and no one who hates it enough to disconnect it as soon as
> it's
> > set up.
> >
> > --t.
> >
> > _______________________________________________
> > Noisebridge-discuss mailing list
> > Noisebridge-discuss at lists.noisebridge.net
> > https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.noisebridge.net/pipermail/noisebridge-discuss/attachments/20120211/54f46e3c/attachment.htm 


More information about the Noisebridge-discuss mailing list