smd.iotkit.ch / Mbed 2 deprecated LichtSensor

Licht Sensor

Dependencies:   mbed

/media/uploads/marcel1691/light.png

Ein Fotowiderstand (englisch Light Dependent Resistor, LDR) ist ein Lichtabhängiger Widerstand aus einer amorphen Halbleiter-Schicht. Je höher der Lichteinfall, desto kleiner wird aufgrund des inneren fotoelektrischen Effekts sein elektrischer Widerstand.

Der Fotowiderstand kann nicht direkt mit einem analogen Pin verbunden werden, da dieser nur Spannungen und keine Widerstände messen kann. Die Lösung ist die die Spannungsteiler Schaltung. Die Kombination Fotowiderstand und Spannungsteiler ergibt einen Licht Sensor.

Anwendungen

  • Dämmerungsschalter

.cproject

Committer:
marcel1691
Date:
2015-08-15
Revision:
2:79735a854c53

File content as of revision 2:79735a854c53:

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