Ik want to create a small device that buzzes every 10 minutes when turned on, to keep track of time when I am gaming.

Requirements:

• On/off switch with power LED.
• USB powered.
• No need for an exact 10 minutes, as long as the time period is somewhat constant.
• Buzzer goes off for about 1 second.
• Less IC's is better.
• Buzzer frequency 440 Hz and loud enough to hear when gaming.

Parts and subparts:

1. The thing that determines the 10 minute period.
   • Could be a 555, probably easiest
   • Could be a transistor-oscillator, but it would stay in active too long and switch the transistor slowly. An additional (schmitt) trigger part would be
2. The thing that determines the 1 second buzzer-on period.
3. The thing that plays the buzzer.
   1. The oscillator.
   2. The amplifier.

Finished circuit