I&apos;m building powered running strollers. Those need battery packs. Battery packs need tabs.<br>Thus, a hack is born.<br><br>An ATXMega32U4a accepts USB control requests to configure weld attributes. I haven&apos;t had time or parts to implement a user interface with a dedicated display, and with a framework I wrote a few years ago called USBKit interfacing to manufacturer-specific USB devices is really quick and easy.<br><br>A 3D-printed foot pedal starts a state machine using TCC0 to control a big solid-state relay which switches the mains across a rewound microwave oven transformer. <br><br>In time I&apos;ll post source code and photos.<br><br>See:<br><a target="_blank" rel="noopener noreferrer" href="https://hackaday.io/project/21470-roadrunner-powered-running-stroller">https://hackaday.io/project/21470-roadrunner-powered-running-stroller</a><br>