Meeting timer

[[email protected]]

I imagine someone has thought of this by now, but I can't find one for
sale...

I need a meeting timer. Basically an egg timer where I can set the
time for 1 to 5 minutes, and with a green LED for "OK to talk" and a
red LED and buzzer for "Shut up, your time is up." Bonus points for a
drag strip christmas tree type LED display, where multiple LEDs light
up or turn off as your time expires.

It has to be small enough to pass around at a meeting, and should have
a "slap to set" switch; no fiddling required.

Thus:

Joe starts off, he slaps the timer to get it going and hands it to the
next person. When that person's time runs out, s/he slaps the timer
and passes it on.

And so on and so forth.

Ideas?

--Yan

 

[[email protected]]

---
555 running a 5 minute down-counter with 1 minute taps decoded, latched
and sent to the 5 LEDs; red, orange, yellow, green, blue.

When the thing times out the red LED will come on and the buzzer will
buzz until the START button is pressed, whereupon the blue LED will come
on, the buzzer will stop buzzing and a new 5 minute period will start.

Want a schematic?

JF  - Hide quoted text -

- Show quoted text -

That would be awesome!

Could the time interval be set (1, 2, 3, 4, or 5 minutes?)

--Yan

 

[Rich Grise]

I imagine someone has thought of this by now, but I can't find one for
sale...

I need a meeting timer. Basically an egg timer where I can set the
time for 1 to 5 minutes, and with a green LED for "OK to talk" and a
red LED and buzzer for "Shut up, your time is up." Bonus points for a
drag strip christmas tree type LED display, where multiple LEDs light
up or turn off as your time expires.

You're not shopping at the right stores. Grocery stores and "Drug" stores
sell these in the cookware section.

Admittedly, not with all of the bells and whistles, but they do give
an audible beep at the end of the interval.

Good Luck!
Rich

 

[[email protected]]

Check your cell phone's apps.

 

[[email protected]]

Check your cell phone's apps.

I need something that's visible in a room of 20 people. I want to
keep the windbags quiet!

All kidding aside, I intend to use this to keep meetings down to a
reasonable time by passing a token which happens to be a timer.

 

[Rich Grise]

I need something that's visible in a room of 20 people. I want to
keep the windbags quiet!

All kidding aside, I intend to use this to keep meetings down to a
reasonable time by passing a token which happens to be a timer.

Just put this on your laptop:
http://www.online-stopwatch.com/eggtimer-countdown/full-screen/

Cheers!
Rich

 

[bw]

---
The schematic is posted here:


JF

Holy Chips, Batman, thats not bad for one days work.
I'll bet you could see a few on eBay.

I bread boarded at 10 minute timer for myself a couple years ago.
My design was
555 to 7490 to 7447 to 7segment

Note that the OP "might" be happier with a large darkroom timer