If this doesn't whet your appetite and make you feel like you've learned something, I don't know what will. But it's a hard course. https://courses.edx.org/co

If this doesn't whet your appetite and make you feel like you've learned something, I don't know what will. But it's a hard course. https://courses.edx.org/courses/course-v1:MITx+6.002x_6x+1T2015/course/ https://courses.edx.org/courses/course-v1:MITx+6.002x_6x+1T2... This was another good one, more practically applicable to a programmer but less low-level: https://www.edx.org/course/embedded-systems-shape-the-world-microcontroller-inputoutput-2 https://www.edx.org/course/embedded-systems-shape-the-world-...