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making a small gadget that vibrates at flexible intervals

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curious cat

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Hello

I have this idea of making a small gadget that vibrates at flexible intervals. The purpose is to remind me of things I need to do.

This idea makes so much sense to me but I can't find anything available commercially, at least not under such as pocket electronic reminders.

It's almost 30 years since I studied electronics so I'm really not sure what to look for.

Can anyone help?

Curious Cat
 
Blueroomelectronics is absolutely right, cost / effectiveness of making the device and its interface to put the data in.... doesn't justify the effort, the cellphone is much better

But for simple tasks, for example taking a medicine in 8 hour intervals, a DIY device would be more interesting.

What about a 555 timer?
 
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