Adding headphone jack to piezo buzzer

Sorry - I don't know much about electronics...I built a metal detector kit that has a piezo buzzer. Ideally I'd like to add a headphone jack to the buzzer so that the buzzer still works if no headphones are plugged in. I don't have a clue how to do that or even if it's possible. The PCB for the buzzer has 2 pads. The jack I have is a 3.5mm stereo jack (have to make mono?).
If anyone can help I'd appreciate it!

by lmrubin
October 08, 2020
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