The sentence 'built the device' is correct and usable in written English.
You could use it in a sentence such as "John built the device to help solve the problem."
The hobbyist, Jonathan P. Brown, built the device from Lego's popular MindStorms series of robot components, which include microprocessors and motors as well as plastic bricks.
"Given that we have had 7 million years to evolve structures and traits for walking, and tens of thousands of hours of practice, we wanted to see if it was even possible to reduce the energy we use for walking," said Steven Collins, who designed and built the device at Carnegie Mellon University in Pittsburgh.
French officials have disclosed that Mr. Reid told American investigators shortly after he was arrested for his apparent attempt to blow up a Dec. 22 flight from Paris to Miami that he had learned to make the shoe bomb from the Internet and built the device himself.
AQAP's Saudi bomb-maker, Ibrahim al-Asiri, is believed to have built the device that Nigerian Umar Farouk Abdulmutallab concealed in his underwear and tried to detonate in an aircraft over Detroit in 2009.
Using little more than scrap wood, a programmable electric motor and an elastic band, he built the device, attached his Fitbit and racked up more than 145,000 steps, or 78 miles, in less than a day spent mostly sitting at his desk.
The Windows 8.1 question remains open, but Microsoft could have built the device with the largest chance to bring back wayward sons and daughters to the Realm of Windows.
Tamerlan and Dzhokhar Tsarnaev, the brothers who carried out the attacks, built the devices using instructions found in al-Qaida's Inspire online magazine.
In fact, they would not even have to be built; the devices at their ends are all that would be needed.
Now, the company has been going deeper into the process, by expanding the group working on Buffy, and exploring other smartphone projects too, creating a team of seasoned hardware engineers who have built the devices before.
The bomber seems to have built the devices first, then set off to figure out where to put them, he said.
There, the manufacturer designs and builds the device, while Google sets some of the requirements and provides the software.
