According to the BBC, next month, MIT (Massachusetts Institute of Technology) will begin offering a free online course in 6.002x: Circuits and Electronics through its fully automated MITx programme. From the looks of it, it’ll be free to join from anywhere in the world, and those that complete it successfully will receive a certificate, while MIT students can complete the course as part of their degree. Apparently there are plans to offer more courses in a wide range of subjects once this initial trial has completed.
They say that there are no formal entry requirements for the course other than some knowledge of mathematics and physics and that it will require about ten hours per week of work to do. From my experiences at university however this is likely to be a major overestimation.
I plan to sign up when they start allowing people to sign up and I shall post a more detailed review once I get to take a look at the course and its content. In the meantime, more information can be found at the MIT website here.
Update: I have now enrolled on the course which will begin on March 5th 2012. You can do the same by going to the MIT page and hitting on enroll.