Hardware Reference
In-Depth Information
Objective complete - mini debriefing
We have set up a dish monitor to alert the user when dishes are detected using an LED.
Setting up sensors for the key
alert system
In this task, we will try to build a module that tries to alert the user if the things that we use
daily (such as the keys to our apartment door or the car key) are not found in the right place.
It helps us save a lot of ime franically searching for misplaced items. We will use a reed
switch and a magnet for this module.
The uniqueness about this task is that we try to improve our lives with simple items that
are easy to purchase and simple to build. A magnet and a reed switch are available from
all hobby stores. You can also use a reed switch in door security systems. The following
is a diagram of a reed switch interfaced to a Raspberry Pi:
Reed switch setup with the Raspberry Pi GPIO
