I need to design a timing circuit. After a duration of 6 months a LED must come on. The LED can then be turned off at the press of a button and the 6 month count-down must begin again. Anyone have any idea where I would start? Is a 555 timer capable of doing something for a time of this duration or would I need somthing else? Any help would be greatly appreciated..
[added] it will be used as a reminder to change a water filter so it should be powered off a small battery..something small, easy to setup and with a low current consumption would also be handy..any help appreciated..thanks for the previous input..
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