BUILD THE MEMO_box

摘要

I have one next to my front door (Figure 1) on which I record voice messages such as:'Do you have your phone and did you take your medicine?' 'Dentist appointment on Wednesday. Pick up Noah at 3 pm.'Playback is automatic when I get close to the door. I've seen reminder boxes that require pushing a playback button, and I'll bet a lot of them do not get used. With the motion detector, there is no decision making to ignore. I have another box along the path through the woods at my home that I use for jokes, like 'Beam me up, Scotty. There's no intelligent life here.' The MEMO_BOX lends itself well to Halloween gags as well. The MEMO_BOX is made up of the following: 1. Parallax motion detector 2. Nuvoton I 16-COB20 voice recorder evaluation board 3. Custom protoboard circuit 4. Three AAA batteries in holder, with wires 5. Speaker (eight ohms).