# Playing With Time

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The initial idea of this project was:

• make a present
• create an original electronic circuit
• use an old phone dial
• give a "steampunk" appearance

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## Step 1: Physical Presentation

• an ON-OFF switch
• a push button "Time"
• a vacuum tube iluminated in red or green from below
• a phone dial
• a wooden box (inside a small speaker, a processor and batteries)

## Step 2: Course of the Game:

1. Power on: Set the switch to "ON"
2. The red LED lights up briefly.
3. Wait ... a little music is played.
4. The red LED is on.
5. Press the "Time" button for a while (ie N seconds). Meanwhile, the green LED is on.
6. Dial the number corresponding to the number N of seconds (between 3.0 and 3.9 seconds, N = 3).
7. If the compound number is correct, a green light and nice music say "Bravo".
8. If the compound number is wrong, a red light and some other music will say "Too bad".
9. Wait for the red light and play again (go to 5.)

## Step 3: Materials List:

• 1 Digispark processor
• 5 Resistors: 220, 2x 2k2, 4k7, 47 ohms
• 1 on-off switch
• 1 push button
• 1 speaker 8 ohms 0.25W
• 1 old phone dial
• 1 RGB Led
• 1 transistor 2n2222
• Optional 1 vacuum tube
• 2 batteries 1,5v AA

## Step 4: Schema :

For simplicity, we chose a power supply of the circuit by 3v (2 batteries of 1,5v).

The blue led is not in use.

## Step 6: Production

I made a wooden box, with hinges and lock. Provide enough space for components and batteries. The top decoration is printed on paper, glued, and all was stained.
I took a Digispark. This is my first project with this component and I discovered its possibilities. You can adapt the project with an Arduino Uno or Nano, or more simply with an Atmega328.

I was inspired by the following instructable and I thank its author:

https://www.instructables.com/id/Interface-a-rotary-phone-dial-to-an-Arduino/

You will see that the game is easy if you press the button 1 or 2 seconds, but more difficult if you press 8 or 9 seconds.

Have fun,

diato from Alsace

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