Cheap piezo buzzers are everywhere. They’re so cheap that they can be used in novelty birthday cards. Applying an alternating voltage across a piezo crystal makes it expand and contract, and fixing ...

In microfluidics, there are “drop on demand” instruments to precisely deposit extremely small volumes (pico- or nano-liters) of fluid. These devices are prohibitively expensive, so [Kyle] set out to ...

Unless you’re involved in cellular-biology research, you may not know about electroporation, which is a powerful yet basic method for delivering small molecules (RNA, DNA, drugs) across cell membranes ...