On Wed, Aug 11, 2010 at 1:02 PM, YES NOPE9 wrote: > I want to be able to robotically press buttons on a cell phone. > This means the throw of the button press will not be more than 5mm. > I have seen mention of buttons requiring 21 pounds of pressure. So > far intergoogling has not revealed consistent data. > I want a solution that costs ~$2 per pressor. ( I can dream ) > > One thing I am considering is some kind of doo-hickey using nitinol > wire. > Any suggestions or sources of button pressors ? > > Gus > > Where did you see 21 lbs of pressure was needed? a quick experiment with my cell phone and a bottle with ~ 8 fl-oz of water in it say otherwise :o) Also, how fast are you trying to push the same button? Since you mention nitinol I'd imagine not too fast. While I dont know the price per foot of nitinol wire, that actually doesnt sound like that bad of a solution, just = a ~10-15mm thick piece of aluminum or heat resistant plastic, with pegs over each key, and a piece of nitinol strung over each peg. Guessing taking apart the cell phone and using strictly electrical means isnt an option? Perhaps with a spring for some pre-load something like a relay could be hacked as an actuator. Or just cheap surplus solenoids like I just found http://www.goldmine-elec-products.com/prodinfo.asp?number=3DG16036 I suspect 3.7 lbs should be enough, but even if its not, a solenoid with that much throw could have inertia to help it out some too. Jonathan Hallameyer --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .