alarm_clock

This is a hobby project to be embedded in a microcontroller, a simple alarm clock which can play different tunes and configured with an LCD screen and buttons. The code is in plain C language, depending on the AVR Library.

Components

The following components are the basic kinds, so I did not specify any model/brand:

• An ATMega8 Microcontroller (or anything compatible, ATTinys would do)
• An MCU programmer (in my case USBAspv2)
• 3v DC Power
• A Buzzer
• An LED
• 2 line simple LCD screen
• Resistors:
  • 5 x 10k ohm (buttons)
  • 1 x 1k ohm (LED)
  • 1 x less than 1k ohm (transistor to mcu)
• 5 x 1 nF Capacitors (debouncing)
• 4 x push buttons and 1 x on-off switch
• An NPN transistor (2N2222 etc.)
• 2 potentiometers [optional]

Fig. 1 : Circuit connections on prototype board

A Most Professional Demo (sound on 🔊)

Here are some tunes of the alarm clock, they are irritating enough to wake you up in the morning 🌞. Two potentiometers you'll see below are for adjusting LCD brightness and backlight, you may include them as you like (not shown in the schematic).

demo_mario.mp4

Fig. 2 : Demonstration (Super Mario Theme)

demo_star_wars.mp4

Fig. 3 : Demonstration (Star Wars Theme)

Note I am aware some notes are a little of due to non-ideality of the MCU and components. They probably need some fine-tuning in notes.h, but I love them flawed like this.

If you like this project buy me a coffee ☕.