sports timer improvement project

Community Projects
1

Hello, :blush:

I belong to a Kendo club in France.
We bought a timer to pace our sessions.

Unfortunately, the sound of the round start and end beeps is too quiet for everyone to hear.
I’d like to improve this without modifying the timer.
The idea is as follows:
I would like to:
1 - Detect the word “work” on the display using a light-sensitive sensor and play an MP3 file on a speaker via Bluetooth.
2 - Detect the word “rest” on the display using a light-sensitive sensor and play an MP3 file on a speaker via Bluetooth. I thought about using this module:

My questions:
1 - Can we connect two photosensitive sensors to this module?
2 - Can we transmit to a Bluetooth speaker?

Thanks for your advice. :person_bowing:

2

  1. Yes, although you’d need to mount the photo-resistive sensors VERY close to the display for them to work as you’ve described

  2. Yes, that board has BT and you can pass audio using it:-)

You also might want to look at using an amp if the speaker is large, something like SparkFun Qwiic Speaker Amp - SparkFun Electronics

If you have an arduino laying around you could also take a look at WAV Trigger - SparkFun Electronics

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3

Good evening.

Thank you for your advice. :person_bowing:

I’ll stick with my initial choice. It’ll be simpler.

I’m going to transmit to an 80-watt connected speaker. I don’t think I’ll need an amplifier.

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4

Do you have a link to a document explaining how to program this card? A tutorial perhaps?