I want to make a medicine box that will only be able to open at preset times.
i have found many 555 based circuits that will count down then activate the relay (connected to a solinoid) but i need it to be perpetual, so if the box isn't opened at that time it will relock and start the count down agian.
a simple 23hr 40 mins countdown before opening the box for 20 mins would suffice (simple is a relative term)
the idea is that wandering fingers can't get hold of medication, but in that 20 min window you can get in and take out the days required medication. (we have already thought of fails safes should we miss an open period)
i have found many 555 based circuits that will count down then activate the relay (connected to a solinoid) but i need it to be perpetual, so if the box isn't opened at that time it will relock and start the count down agian.
a simple 23hr 40 mins countdown before opening the box for 20 mins would suffice (simple is a relative term)
the idea is that wandering fingers can't get hold of medication, but in that 20 min window you can get in and take out the days required medication. (we have already thought of fails safes should we miss an open period)