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automatic numeric display/countup & hold

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Slippyblade:
I was actually worried about that.  If I was doing it I'd probably just add a new switch into the side of the lane that was dedicated to the AVR circuit.

bimm25e:
hey guys thanks, I was thinking adding a second switch to that hole would be a better way to do it than to try to jump onto the existing one. 

anyone have a ballpark what a controller and 2 digit display are going to run me?

any links to things I should buy would be greatly appreciated.
I have a modest programming background (basic, c++, java, SQL), is this something that a person with my abilities could pull off in a weekend?

Slippyblade:
A simple AVR is $5.  You program it using the same tools as an Arduino.  It is VERY simple.  The language is extremely similar to C/C++, though I'd recommend getting a "Dummies" book or something first and skimming it.  Using an AVR isn't exactly the same as an Arduino since the pinout and exact capability would be a little different, but as long as you keep that in mind, easy peasy.  As far as the display goes...  tons of choices.  Some will have a built in decoder, some will be multi digit, etc.  Gonna have to dig around for that one.

bimm25e:
thanks guys.  One more question (I see this sub-forum doesn't get a lot of action so I don't want to start a new topic).

I have a Christmas ornament that is powered by a single CR2302 battery.  Its a cool flux capacitor thingy I got from etsy.com and it fits under the main ramp of my pin superbly.
>https://www.etsy.com/listing/173091869/flux-capacitor-ornament-from-back-to-the

  The manufacturer said the ornament is rated to a 5.5V power supply and could be ran from a 6.3V pinball socket if I were to purchase a 5V LDO.

I have another ornament (thank you hallmark)  that I want to include
>http://shop.hallmark.com/products/flying-time-machine-1995QXI2746.html
This is also powered by a CR2302 batttery


 Im shopping on digikey and I see I have a lot of choices I was wondering if someone could recommend an LDO that would be appropriate to use tied in to a 555 socket (data easts back to the future) that would supply just a bit above the standard voltage provided by a CR2302 battery so I could buy 2 of them and power both ornaments from separate 555 sockets. (preferably bridging onto the socket while an LED bulb is being used in the socket if that's ok)
(will this one work> http://www.digikey.com/product-detail/en/MIC5205-3.3YM5%20TR/576-1259-1-ND/771886) 

Should I be buying resistors/diodes/capacitors as well?  Or will the LDO handle everything?


thanks all

Slippyblade:
Those are awesome little ornaments you got there.  Good call working them into the machine!

I'm a little confused though.  A CR2302 is a 3v battery.  Seems to me that if the ornaments are being run off of a 3v battery that you'd wanna use a 3 volt regulator.  Like this from SparkFun.

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