A-level DT student help with Motion Sensor/Speaker Circuit

Support
1

Hi guys,

I’m doing my DT coursework worth 50% the A-level around a product similar to a balance board.

I would like to have sensors on the front and back that when they sense the board has hit a point a wave sound plays on some small speakers integrated into the board.

Would appreciate any recommendations as to what sensors/speakers/circuit to use and how to go about building this circuit.

Thanks so much

Dylan

2

Not near enough info to give any kind of practical advise.
Define “balance board” with some detail. Teeter Totter? Moving on wheels?
Define “hit a point” with some detail. Has tilted / moved?

3

A balance board is like a non-technical device consisting of a pivot and board.

Basically, once the user has shifted the board so far forward/back I want a sound to go off. Potentially, it could be a contact or magnet connection that causes the sound to go off but I am open to your suggestions as to what sensors I could use.

Thanks so much for helping

4

A gyro sensor would probably be what you are looking for. It should detect angles and then you can react. You could probably also work with cheap proximity sensors, but expect problems since the tilting will not change the proximity enough to discriminate cleanly.

Regarding your second question (speakers): the simplest thing is to use a passive buzzer which can play simple tunes. If you really want to play sound files, you would need a cheap amplifier (e.g. PAM8302) together with a mini-speaker. I used that combination in my christmax-box project GitHub - bablokb/christmas-box: A Christmas-box with sound and display (btw: the sound is terrible with these small speakers ;-)