The Invisible Trillion · What Chips Actually Do

A Tour Through Your Day

Let’s do the same thing we did with energy in Chapter 5, but with chips. Let me walk through an ordinary day and point at every chip you interact with, roughly in order.

You wake up. Your phone alarm wakes you. The chip that decided to play the alarm is a microcontroller inside the phone, running a scheduled task on battery-saver settings. It signals the main processor to wake up, which signals the audio chip to play a sound through the speaker amplifier chip.

You look at your phone. Your glance is picked up by a proximity sensor chip that tells the display to turn on. The display is driven by a display controller chip. Your thumbprint is read by a fingerprint sensor chip, which has its own small processor to match the print. The result is verified by a security chip (Apple calls theirs the “Secure Enclave”) that is deliberately isolated from the main processor so that even if the main processor is hacked, the fingerprint data is safe.

You check the weather. The weather app runs on the main CPU. The forecast data comes over the cellular network, handled by the modem chip. The modem talks to a cell tower, which has its own chips handling thousands of connections simultaneously. The weather data comes from a server, which is a big CPU in a data center somewhere.

You drive to school. Your car has, on average, about 1,500 chips in it. The engine is managed by an engine control chip. The transmission has its own chip. Every airbag has a chip watching an accelerometer for sudden deceleration. The anti-lock braking system has a chip. The backup camera has an image sensor and a processing chip. The dashboard is driven by a dashboard computer. The infotainment system has its own chips. The stereo has chips. If the car is electric, the battery management has dozens of chips. If the car is self-driving or partly self-driving, it has specialized AI chips running inference on the sensor data many times per second.

You arrive at school. You tap an RFID card to enter. The card has a chip. The reader has a chip. The door controller has a chip. The security system talking to all the readers has chips.

You open your laptop. The laptop has a CPU (maybe 20 billion transistors), a GPU (maybe another 10 billion), memory chips (dozens of billion more), a chipset coordinating everything (another billion), a Wi-Fi chip, a Bluetooth chip, a camera chip, a microphone chip, a battery management chip, and a trackpad controller, among others. You open Google Docs. The document lives on a server in a Google data center, which has tens of thousands of servers with hundreds of thousands of chips.

You pay for lunch with your phone. Your phone’s NFC chip transmits an encrypted token to the payment terminal’s NFC chip. The terminal sends it to the payment processor, which is running on servers that use specialized security chips for encryption. The bank that issued your card has its own servers. The merchant’s bank has its own servers. The chips involved in processing this one $7 sandwich payment probably number in the millions, scattered across four continents. All of this happens in about a second.

You go home. You turn on Netflix. The TV has chips. The streaming is served by yet another data center. The video is compressed by specialized video chips and decompressed by chips in your TV. The recommendation algorithm that picked the thumbnail you saw is running on AI chips somewhere.

You go to bed. Your phone charges on a wireless charging pad, which has its own chips controlling the power transfer. Your smart thermostat adjusts the temperature based on a chip that’s been watching your habits for weeks. The smoke detector on the ceiling has a chip checking for particles every few seconds.

All day, chips. Roughly 100,000 to 10 million individual chips participated in your ordinary, unremarkable day, depending on how you count. Most of them you never thought about and could not have pointed to if someone asked. All of them, together, made your day work.

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