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Sometimes, my work requires a soundtrack, because of this I didn't hear people approaching me as I'd be too focused to notice. causing many awkward moments and one memorable left hook, (no worries I missed, and my co-worker laughed) So I came up with the idea of a cube bell; visitors push a button and a group of LED's blink. Then I ran across a small version of the WOPR from "Wargames", and I had my case. Video of LED's in action here: https://youtu.be/zWpbHMqR2c0
Print (note I ended up scaling the WOPR to 105 %) , sand, paint -- I used acrylics. except for some parts that were metal on the original, then I used Testors "Brushed Aluminum" and or a silver paint pen.
For the electronics you will need:
Arduino Nano or Adafruit trinket or other Microcontroller that fits on 170 pin breadboard.
7x 5mm LED's 6 RED 1 Amber
5x 330 ohm resistors
1 10k resistor
1 button, I used this one from Adafruit (https://www.adafruit.com/produ...) they are out of blue but have other colors avaible.
1 5x7 CM perfboard and a bit of scrap perfboard
ribbon wire I got mine at Amazon (https://amzn.com/B007R9SQQM)
header pins or dupont connectors starter kit for dupont here (https://amzn.com/B012EOO9Q0)