DIY Electronic puzzle box

Schematics and information :
http://majsterkowo.pl/zagadkowe-pudelko-na-prezent/
Music used: Notion of the Past by Jens Kiilstofte https://machinimasound.com/music/notion-of-the-past/
Licensed under Attribution-NonCommercial-NoDerivatives 4.0 International (https://creativecommons.org/licenses/by-nc-nd/4.0/)

Razor" ultra-thin rubberized cups Two Omni directional microphones Provides sound activated protection over 89 dB at 0.02 reaction time Noise reduction rating of 23dB. Operates on 2 'AAA' batteries- Included

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Price: $35.34

Walker's Razor Slim Electronic Muff, Black

(5288)

Razor" ultra-thin rubberized cups Two Omni directional microphones Provides sound activated protection over 89 dB at 0.02 reaction time Noise reduction rating of 23dB. Operates on 2 'AAA' batteries- Included (as of September 21, 2020 - )

Conveniently Includes Cables: 4 Lightning Cables, 1 Type-C Cable, and 1 Micro-USB cable perfectly sized to keep your space organized; Warning: Not Compatible with Cables Not Included Fast and Smart Charge: 6 2.4-amps ports charges cell phones and tab...

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Price: $44.99

Hercules Tuff Charging Station for Multiple Devices - 6 Short Mixed Cables Included for Cell Phones, Smart Phones, Tablets, and Other Electronics - Multi Charger Organizer Docking Station

(4245)

Conveniently Includes Cables: 4 Lightning Cables, 1 Type-C Cable, and 1 Micro-USB cable perfectly sized to keep your space organized; Warning: Not Compatible with Cables Not Included Fast and Smart Charge: 6 2.4-amps ports charges cell phones and tab... (as of September 21, 2020 - )