Using diodes and transistors from Radio Shack, and with the help of a music student in his dorm who had perfect pitch, he got it built before Thanksgiving.
At the same age when Jobs was puzzling over a carbon microphone that his dad couldn't explain, , Wozniak was using transistors to build an intercom system featuring amplifiers, relays, lights, and buzzers that connected the kids' bedrooms of six houses in the neighborhood.
" Woz, as he was known even then, would ask about the resistors and transistors lying around the house, ,, and his father would pull out a blackboard to illustrate what they did.
His little stockroom, to which he would lend the key to pet students, was crammed with transistors and other components he had scored.
William Shockley, who had been one of the inventors of the transistor at Bell Labs in New Jersey, moved out to Mountain View and, ·（William Shockley),, in 1956, started a company to build transistors using silicon rather than the more expensive germanium that was then commonly used.
This enabled the team to divide up the transistors within the chip into small groups and ask each to perform a different task.
