I am helping with a middle school project. The idea is to power a 3 V vibrating motor for about 10 seconds after the alarm goes off.
The cheapest way so far I have found is to get a dual alarm clock and replace the buzzer with the motor. Unfortunately, since the alarm goes on for 30 minutes, or until manually shut down, the motor runs for that long. I just need it to run for about 10 seconds. What can I add/put between the clock and the motor so the power shuts off after the period of time till the next alarm event?
Second, if there's a way to do this with some kind of circuit timer, instead of an alarm clock, that would be ideal.
The goal is to be able to set 2 events within a 24 hours period (every 12 hours, or twice a day); when the even happens, it should power my 3 V vibrating motor for about 10 seconds and then turn off.