Small board - great value (Or how a little Arduino Nano is improving our Toastmasters meetings)
For those who are still wondering what Toastmasters (http://www.toastmasters.org/) means, this is as non-profit organization which helps people develop their communication and leadership skills. Take a look, you'll probably find a club near you that you can visit to learn a little more.
Anyway, one of the things we learn at Toastmasters is to deliver speeches and, on top of other evaluation criteria, we have a person controlling the time of your speech, as we have to keep it between specified thresholds.
This timing process often is manual, error-prone and a little boring. That's when I decided to find a nice project to my Arduino Nano.
Toastmasters Timer is basically a timer-controlled traffic light with some presets for specific tasks which are time-bound at any Toastmasters meeting. For instance a Standard Speech should be between 5 and 7 minutes: you get a green light when you reach the 5 minute mark, a yellow light at 6 minute and red one after 7 minutes. This project automates this process of turning lights on and off for the most common tasks.
I added a LCD screen to show the type of preset being used, and also a custom/manual timer for any specific need not covered by the presets.
1 x Adafruit blue LCD I got as part of ADABOX 2 https://www.adafruit.com/products/1447
8 x Generic Buttons (Uxcell 10 x Momentary SPST NO Red Push Button Switch AC 250V/1.5A 125V/3A)
1 x 330R resistor.
2 x 15 pin female header (to hold the Arduino nano)
1 x Snappable PC BreadBoard for all the wire soldering an to hold the Arduino Header
18 LEDs: 6 Red, 6 yellow and 6 green for both the panel and the traffic light that goes on top of the device so people speaking can see it.
2 pieces: 1/8" X 12" X 12" (3 X 300 x 300 mm) Baltic Birch Plywood
5V power supply for the Arduino