Replace the springs with weaker ones. Drive the jaw shut with the servo, don't just let it drift back. OR Gear down the servo OR Get a bigger servo - someone at the Asylum would likely barter one to you on short notice.
* Drew Van Zandt Artisan's Asylum Craft Lead, Electronics & Robotics Cam # US2010035593 (M:Liam Hopkins R: Bastian Rotgeld) Domain Coordinator, MA-003-D. Masquerade aVST * On Tue, May 1, 2012 at 3:25 PM, Mark Komarinski <[email protected]>wrote: > Ok, so here's the background. > > After many years of software and Linux tinkering I finally got into > Arduino for hardware tinkering. As I usually do when learning a new > software language, I pick a 'big' project and give myself plenty of time to > work on it - the thinking is that starting big I can break the project down > into small parts that I can figure out separately. > > My Arduino project is a Halloween skull. Ideally, I'd like: > > - motion sensor to activate when someone is nearby and cause the jaws to > open and shut quickly > - LED eyes that glow brighter the darker it gets (I already have this > working) > - sounds (optional, probably add a sound shield) > > My problem is the first item. The jaw is held in place using two springs > (no other connection exists between the jaw and rest of the skull). The > tension that's required to open it is too much for the servo that I have. > I was thinking a linear actuator, but those appear to be way more > expensive than I'd want to spend. Different springs may work, but I want > the jaw to snap shut thus requiring a good bit of tension. I've already > got a few PIR sensors I'll use to know when there's nearby motion to > activate. > > Any thoughts? > > -Mark > ______________________________**_________________ > Hardwarehacking mailing list > [email protected] > http://lists.blu.org/mailman/**listinfo/hardwarehacking<http://lists.blu.org/mailman/listinfo/hardwarehacking> >
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