I’m trying to hook up a piezo buzzer (the one from the arduino starter kit) with a 555 timer.
I’m using the following instructions : http://makezine.com/projects/laser-tripwire-alarm/
The issue is that I’m only hearing a single “click” coming from the piezo when the light beam is interrupted instead of an actual sound.
The piezo works (I’ve hooked it up to an Arduino to play a melody) and the 555 timer also works because I can build a simple flashing LED.
Any idea what might be wrong ? I’ve followed the schematic and here’s how it looks on the breadboard :