Foto: Afrank99 · CC BY-SA 2.5 · Wikimedia Commons
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Resistor
The resistor limits current flow and carries coloured rings as a value code.
💡 Did you know? The colour bands reveal its value.
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Which component is this?
Foto: Elcap · CC0 · Wikimedia Commons
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Capacitor
The capacitor briefly stores electric charge.
💡 Did you know? It smooths voltages in circuits.
Foto: Benedikt.Seidl · Public domain · Wikimedia Commons
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Transistor
The transistor switches and amplifies electrical signals.
💡 Did you know? Billions of them sit in every chip.
Foto: Grapetonix · CC BY 3.0 · Wikimedia Commons
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LED
The LED is a diode that emits light when current flows.
💡 Did you know? It is more efficient than a light bulb.
Foto: Mister rf · CC BY-SA 4.0 · Wikimedia Commons
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Diode
The diode lets current pass in only one direction.
💡 Did you know? A ring marks the blocking direction.
Foto: en:User:Brianiac · Public domain · Wikimedia Commons
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Battery
The battery stores energy chemically and supplies direct current.
💡 Did you know? It has a plus and a minus terminal.
Foto: Miguel · CC BY-SA 3.0 · Wikimedia Commons
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Coil
The coil is a wound wire that creates a magnetic field.
💡 Did you know? It stores energy in a magnetic field.
Foto: Retired electrician · CC0 · Wikimedia Commons
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Relay
The relay is an electrically operated switch for larger currents.
💡 Did you know? A small current switches a large one.
Foto: André Karwath aka Aka · CC BY-SA 2.5 · Wikimedia Commons
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Fuse
The fuse breaks the circuit when the current is too high.
💡 Did you know? A thin wire melts through in the process.
Foto: Ulfbastel · Public domain · Wikimedia Commons
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Circuit board
The circuit board holds components and links them via printed tracks.
💡 Did you know? It is usually coated green.
Foto: Die prepared by Matt Britt w:User:Matt Britt = w:User:Uberpenguin = w:User:Uberpenguin~enwiki = https://web.archive.org/web/20080605030548/http://mattb.alwayssleeping.com/ https://web.archive.org/web/20140607040627/http://www.alwayssleeping.com:80/images/486/ https://web.archive.org/web/*/http://alwayssleeping.com/images/cleanroom/* photo taken by Matt Gibbs (matt[AT]alwayssleeping{dot}com) · CC BY-SA 3.0 · Wikimedia Commons
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Microchip
The microchip packs tiny circuits into a black case with many legs.
💡 Did you know? It is the brain of computers.
Foto: en:User:ArnoldReinhold · CC BY-SA 3.0 · Wikimedia Commons
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Switch
The switch opens or closes a circuit by hand.
💡 Did you know? The light switch is the best-known example.
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