In 1991, I bought a STIHL weed trimmer, gasoline powered. It ran famously until 2011, lots of abusive hours, lots of E-10. When it died the piston was simply worn out... hence no compression. I don't know why your Weed Eater died, but you get what you pay for. I bought another STIHL.... cost 10-20% more than a Weed Eater... worth every penny. And, I don't have the option of going battery or electric for this machine. Too much remote work.
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.