How MEMS Accelerometers & Gyroscopes Work
Microscopic silicon springs, proof masses, and comb-finger capacitors detecting movement and gravity inside your phone.
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Step 11. Rest Equilibrium (C1 = C2)
Silicon proof mass is centered between static comb electrodes.
Symmetrical gaps between interdigitated comb teeth yield balanced capacitance across the sensing bridge.
Step 1 of 4How MEMS Accelerometers & Gyroscopes Work
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Inside your phone is a microscopic mechanical machine with tiny silicon springs and weights that shift when you move, tilt, or rotate your screen.
Key Takeaways
- ✓MEMS = Micro-Electro-Mechanical Systems.
- ✓Contains a microscopic weight (Proof Mass) suspended on silicon springs thinner than a human hair.
- ✓When you tilt your phone, the weight slides, changing electrical capacitance to auto-rotate your screen.
Microscopic Machines in Silicon
When you turn your phone sideways to watch a video, how does it know gravity shifted?It doesn't use software magic — inside is a genuine physical machine carved into silicon called a MEMS sensor. It features microscopic suspended weights, flexible springs, and interlocking teeth that move by nanometers when subject to acceleration or rotation.Interactive Challenge+25 XP