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Pop-a-ball aracde game with Raspberry Pi

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orizzle:
I'm looking at some cheap solenoids on eBay and watching a few youtube videos.  It seems like the cheap 12v solenoids probably won't pack enough punch to launch balls of that size. Has anyone tried anything similar?

matsadona:
As for sensing the balls you can also use the switches that are common as coin switches.



When it comes to popping the balls, compressed air can be an alternative perhaps? You could scale it down and use standard ping pong balls...

baritonomarchetto:
For "sensing the ball", you could use a 10 cents photosensor: when when the ball is in place, the photosensor goes low. This should work with pingpong (read "weightless") balls too

DaOld Man:
As for popping the balls, could you use one piece of plywood, under the play field, with a pin for each hole.
Then have a solenoid move the plywood up and down. All the pins would move but would that matter?
The solenoid would have to be pretty hefty, requiring a power transistor to turn it on, and may be noisy, so this may not be desirable.
Or something like this, but you would need one for each hole:
http://www.allelectronics.com/make-a-store/item/sol-102/miniature-12vdc-push-type-solenoid/1.html
And with just about any solenoid, you are going to need some type of driving circuit.

Edit: just read the customer comments on that solenoid, it may not work for what you want. I'd order just one first to try if it were me, if I decided to try them.

Edit again: If you used the one piece of plywood idea to move all the pins at once, you might could use a servo motor with a crank in the center of the plywood to move the plywood up and down in one servo revolution.
The panel wouldnt have to be plywood, it could be a lighter plastic sheet.

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