They're are all inventions by Texas Instruments Inc. employees shown off today at the semiconductor company's second annual "DIY with TI" event at its Dallas headquarters.

This farmer spent five months building this DIY submarine, which he successfully took to a depth of 30 feet in a lake near his home town of Dangjiangkou, in the Hubei province.

Long walled off from world trade and modern technology, Cuba has developed a robust culture of DIY engineers who turn household items into useful inventions. Water pump motors propel bicycles ...