Each of the transistors can independently produce an electronic signal when placed under mechanical strain.

BBC: Sensors

The pieces of scenery are activated by switching on and off so-called passthrough transistors that control the flow of electronic signals from one part of the chip to another.

FORBES: Chips that change their spots

Electronic chips consist of millions of transistors, each of which does one simple thing: it uses the voltage at one of its three junctions to decide whether or not to let current flow between the other two.

ECONOMIST: Babbage’s last laugh | The