7. Electronics – 7.4 Dark detectors (teacher instructions) © Siemens Stiftung 2019 CC BY-SA 4.0 international

7. Electronics – 7.4 Dark detectors (teacher instructions)

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Experimentation instructions:
Background information on the content and practical information on conducting the “Dark detectors" experiment.

English
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PDF (111.0 kByte) DOC (275.5 kByte)
2020-09-07
This experiment builds upon the learning of experiment 7.3, properties and function
of a transistor. A dark detector is a good first example of an electronic circuit, where
the input signal of the LDR operates an output (LED).

One item deals with „Technical application and vocational orientation“.

Information and ideas:
Depending on the LDR, the circuit functions slightly differently, i.e. you need to cover more or less of the LDR to switch on the transistor (LED). Also note that changing the 10 kΩ resistor to a different value will change the function of the circuit.
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Experiment
Physics; Technology
Grade 7 to 9; Grade 10 to 13
Middle/high school; Vocational training
Electrical circuit; Electricity; Electronics; Energy; Resistance (physics); Semiconductor
Siemens Stiftung Media Portal
Dr. Ramon Leyendecker
© Siemens Stiftung 2019
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