Eeg electrode cap and incandescent light bulb: what they have in common

1. Step 1. Eeg electrode cap — is part of — Brain–computer interface. They pick up potentials from the scalp.
2. Step 2. Brain–computer interface — has part — Amplifier. A bioamplifier.
3. Step 3. Amplifier — has part — Triode. Tube amplifiers.
4. Step 4. Triode — is made of — Tungsten. The filament is tungsten.
5. Step 5. Tungsten — is material for — Incandescent light bulb. A tungsten filament (since 1904–1910).

Open Evothings