555 Timer Metronome for Guitar Practice — Vertical project video

Built an adjustable 555 timer astable circuit with a potentiometer controlling tempo and a small speaker for click output. Started as the book's basic blinker experiment, then swapped the LED output for a transistor-driven speaker and added a 10-turn pot so I could dial in exact BPM ranges. Next step is adding a second 555 in monostable mode to shape the click into a sharper transient instead of a raw square wave.