Range Commands Timer

This Thing which I recently developed can be used as a timer for e.g. range commands.

Ít can be programmed to give commands like:

a) "For the next competition - Load"

b) "Start"

c) "STOP"

LEDs indicate: Power on, Stop (RED), Get ready (YELLOW), Shoot (GREEN).

A built-in amplifier PAM 8404 and loudspeaker give you clear commands. The commands have been created by using Text-To-Speech applications, then edited a bit with an audio editor. I made three commands: see above a, b, c.

They are all in mp3-format, and are saved on a micro-SD-card, for the DFPlayer-mini.

An Arduino Nano and additional LEDs, wires, resistors, battery, connectors, push-buttons and switches complete the investment. I guess this is in a $15 range, including PLA-filament.

Modes:

• You have 3 modes of operation:
  1. • Ext.: use external switch (foot switch, other) to start the operation per shot!
  2. • Push Buttopn: use Start push-button to start
  3. • Auto: set right switch from right position (Auto-OFF) to left (Auto-ON). Then after STOP command, it automatically restarts after a couple of seconds.
  Reset button for resetting the Arduino.

Operation:

• Power on (Blue LED lits up)
• Start with 1. or 2. or 3.
• Yellow LED lights up, a voice says: ...For the next competition - LOAD...
• Then.. START (Green LED). Then you have 50 seconds time to make your execution of what ever you are practicing.
• After 40 seconds Yellow LED lights up, indicating you to speed up with that. Your last 10 seconds are elapsing....
• 50 seconds after START the Red LED comes up, STOP is the command.
• Few seconds later Red LED shuts off. You are ready for the next round.

This is very useful for training purposes, it makes fun and it made a lot of fun creating it.

Print Settings

Printer Brand:

Prusa

Printer:

i3 MK3

Rafts:

Doesn't Matter

Supports:

Doesn't Matter

Resolution:

Medium or Fine

Infill:

Your choice

Filament: Your choice PLA (your choice) Your choice

Notes:

You need to decide about raft or support. Depends on the file(s). I built the main housing with loudspeaker-opening on build plate. My Prusa did good with printing MAINLY without supports. I just used MANUALLY created supports only in the loudspeaker opening.
The loudspeaker plate needs to be re-designed depending on your speaker. I printed the loudspeaker with 99% size, for a better fit in the housing. No rework!

Sound is quite acceptable for a Ø28mm speaker. Sound just comes fine, after you build it into the housing. Before you barely can hear the speaker. Bear this in mind. The PAM 8403 module does a decent job, I work with less than 50% volume. Am excited how my new speaker behaves, once it arrives (due to actual Corona lead times...,).

Internally the monting rack needs some attention, as parts are mostly mounted differently.

I use (by now) an internal battery pack of 4 AA (rechargeable) batteries.

You may need to sort out the files and likely need to separate connected surfaces for your fine-tuning.

One housing version carries all necessary descriptions already in the print. Just in case you like it.