Yet another thing to add to my "projects" folder that I hope to one day have time to get around to attempting. Archive: https://archive.today/YuyDF From the post: >>YouTuber [MechPanda] has recreated a DIY STM hack we covered about ten years ago, updating it to be primarily 3D-printed, using modern electronics, making it much more accessible to many folks. This simple STM setup utilises a piezoelectric actuator constructed by deliberately cutting a piezo speaker into four quadrants. With individual drive wires attached to the four quadrants. They (re)discovered that piezoelectric ceramic materials are not big fans of soldering heat. Still, in the absence of ultrasonic welding equipment, they did manage to get some wires to take to the surface using low-temperature solder paste.