Better RC Sailboat Racing Countdown Timer

Better Countdown Timer for RC Model Sailboat Race Starts

Products used from AdaFruit
AA Battery Holder with On/Off Switch and 2-Pin JST[ID:4779 (
JST-PH 2-Pin SMT Right Angle Connector[ID:1769] (for power in to sound board)
1 x Panel Mount Stereo Audio Extension Cable - 1/8" / 3.5mm[ID:3319]
1 x Adafruit Audio FX Sound Board - WAV/OGG Trigger with 16MB Flash[ID:2220]
ST-PH 2-pin Jumper Cable - 100mm long[ID:4714] (Cut wires from this jumper are used to control on/off and lengthen the battery box cabling to the circuit board)

Items from Amazon

Prewired IP65 Waterproof Push Button Latching Self-Locking Aluminium Alloy. You need 1 on/off switch for power and 2 momentary switches, one for the 2 min sound file and second one for the 1 min sound file. Each additional sound file will need its own momentary switch.  

(I used 5 switches for the audio files. The attached .zip file contains the 5 .ogg formate audio files, 1 Min, 2 Min, Star Spangled Banner, Sweet Home Alabama, and Ramblin' Man. These five .ogg files are ready to be loaded onto the sound card. 

Five .ogg files in the .zip are T01 (one minute, T02 (two minute) T03 (Star Spangled Banner),  T04 (Sweet Home Alabama), T05 (Ramblin' Man).

Additional Items

4  - 3mm x ~20mmm hex head SS bolts

3 - AA batteries

4 - 3mm heat set threaded inserts

Doubled sided tape to secure battery box to rear lid.

Solder & soldering iron, velcro loops, some heat shrink, 2 x 330mm x 4.4 mm rope for loop handles.

JBL or equivalent powered speaker with 1/8" audio out cable.

Visit AMYA website/webinar and Adafruit for tutorials on this sound board. I added 3 extra sound files to the Adafruit sound board. Delete the 3 extra holes on the sides and bottom if only using the 1 Min and 2 Min sound files.

AMYA (Raw mp3 format) start files:

https://www.theamya.org/start-tapes.asp

AMYA (members only webinar) about their version of a countdown timer.

https://www.theamya.org/Member/Webinars.asp

https://vimeo.com/445372796