Ask HN: Does anyone know of any good hardware company startup blogs?

HN submissions often provide great advice on how to successfully build a pure software company. Can anyone recommend similar content sites or blogs which offer advice from those who have founded companies that sell some sort of hardware? More specifically, hardware that runs embedded software or has some external software support component for it. (Medical devices would be one example.) There seems to be tremendous opportunity in this area as well, but the challenges would obviously be somewhat different.