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I need help with programming the opening and closing of a lid? Answered

Okay so I'm trying to build something that will allow the li I placed on a vial to open and close according to the time protocol I assign it on Audrino. The lid is a flip, spring action lid made from hard plastic. The programming shouldn't be a problem, but I wanted to see if there is another easier way to go about this keeping the whole thing under 100grams. At first I was thinking adding Velcro to the top on the lid and on the side of the vial that the lid retracts to. The lid moved by a micro piston of some sort all powered by a watch battery a chip programmed by Audrino. But I was thinking if there is some sort of mini lever arms or somehow rig a magnetic reed switch with a magnet an use the polarities to push pull the lid? I'm just having trouble with the design, getting very frustrating. I attached a picture of a very very quick doodle of what I mean. The top design is with the Velcro idea. Thank you so much, really hope I learn something from you guys and others too!!

Picture of ideas:
http://i.imgur.com/pREJ9O3.jpg

Thanks again!  :D 
sorry for long message! 

Discussions

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steveastrouk

5 years ago

How long is the lid open for, in the cycle ? How many cycles a day are you expecting ? I'd be tempted to use a linear solenoid like this:

http://uk.rs-online.com/web/p/linear-solenoids/2509174021/

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Aehteshasteveastrouk

Answer 4 years ago

very very very sorry for all the replies lol Does it differ when the title of the solenoid says push type? or is there a push and pull one as well? Money isnt a factor at all, school grant can cover it. If these are push devices, would you just mount one on each side, programmed differently? Your suggestion really intersted me haha

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steveastroukAehtesha

Answer 4 years ago

There are push-pull and latching solenoids too, pulse current one way, it moves on way and stays, pulse current the other way and it switches over. ...but you could have found that out with a bit more searching LOL.

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Aehteshasteveastrouk

Answer 5 years ago

Well I can wire the battery off the device to somewhere else on a bigger board which will contain other devices my team is making. Im planning on it being open for just 2 hours,, maybe program it to close every half hour if possible. But thank you VERY much for the suggestion! Never heard of a linear solenoid, how does it work?

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steveastrouk

5 years ago

How tightly sealed is the lid ? How much force will it take to raise it. Your biggest problem is the actuator and the battery to power it.

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Aehteshasteveastrouk

Answer 5 years ago

Well the battery is gonna be pretty powerfull and off the device. It's powering a whole contraption that will be doing numerous operations. My device is just a addition to it. I'm positive a low force actuator would suffice, since the spring is that off a mechanical pencil. Idk if I'm on the right track at this point hahaha

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steveastroukAehtesha

Answer 5 years ago

So the weight of the battery isn't part of your 100gramme budget ?

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Aehteshasteveastrouk

Answer 5 years ago

Also it's not sealed, it just lays closed on top no press needed. It enough for the result I need lol