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robots... connection alternative?
http://www.wonderhowto.com/how-to-make-cockroach-robot-253241/
i have specified the link for cockroack robot... can some one pls tell me an alternative which can be used instead of guitar strings??
pls give me specific answers...
and is it a SPDT switch which is used??
thank u in advance! 
Almost any solid wire should be fine in place of the guitar string pieces. It needs to be thin enough to bend back and break the motor circuit when the robot runs into something, and it needs to be springy enough to bounce back afterwards, so soft copper wouldn't be a great choice. (It would work, but you'd probably need to rebend it after a few hard collisions.) If you can find steel wire at about 26 or 22 SWG (about 1mm diameter) that'd be good. I'd curl the ends back too, so I didn't end up puncturing walls, furniture or people.
The switch in the video is SPDT but only one pole is used, so he could have used an SPST. It looks like he used whatever he had lying around -- based on its legs, that LED has been in and out of more than a few circuits.
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