I actually need this set up for my workplace, but I believe you folks here will have the answer.
We need a light to come on every 30 minutes to alert staff to check something routinely. Newer staff are prone to forget or wait too long, and so a light to indicate a certain time interval has passed will do a lot of good.
Imagine a red LED that comes on every 30 minutes, a person sees it, does their routine check, presses a button which then shuts off the light resets the 30 minute timer.
I've done a lot of looking and I don't seem to see anything online that would do this, so I figure I may have to wire something myself. Everything turns things off after a set interval, but not on.
Any help would be appreciated, what I would need to do this and how I'd need to set it up. If there is anything I could purchase that will do this out-of-box that would be ideal.