ripple in canvas

[luv2liv]

i have a huge canvas picture from ikea about 50x115 inch. it is a picture of a wave. the whole thing would look so cool if i can mount something in the back of the canvas to make ripples. now, i can achieve ripple by once in a while tapping the canvas with my finger manually. is there a device that can do this ripple fx automatically? i searched raspberrypi.org n seems nobody made something yet

 

[PottedMeat]

all you need is a slow rotating motor with a cam

http://en.wikipedia.org/wiki/Cam - make the profile through trial and error

or maybe pulsing a solenoid with a 555 and transistor

 

[luv2liv]

oh thats a great idea! i need to look into this cam stuff.
ty!

on second thought, after seeing how a solenoid works on youtube, i think thats a better option. i hope someone packaged it with a 555 so i dont have to build anything. all i have to do then is just install it behind the canvas n hook it up to a power source