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 ...
I have a USB cable connected to a USB modem. On a specific time of day (say, at midnight - but it should be configurable) I would like to open the circuit for a few seconds. The result should be ...
After being inspired by a simple ATMEGA 168 based darkness alarm that has a theoretical life span of 3 years on batteries utilising sleep mode, I had decided to make something similar of my own (a ...