555 tone generator

The astable at ~1.4 kHz drives a piezo buzzer. Click 🔊 in the header to actually hear it; change C or Rb to change the pitch.

What's on the bench

• 2× Resistor
• 555 Timer
• Battery
• Buzzer
• Capacitor

This project runs prebuilt firmware on the emulated board; open it in the simulator to watch it work and inspect every part live.