Experiment

Siemens Stiftung

7. Electronics - 7.3 Transistors (teacher instructions)

Experimentation instructions:Background information on the content and practical information on conducting the "Transistor" experiment.The experiment provides students with the opportunity to learn about transistors which are used in almost every technological device. Transistors are the fundamental components of modern electronics ranging from cooking stoves, car ignitions and household air-conditioners to control systems and airplanes, to name just a few of millions of examples. Transistors have also been central to the development of logical operations and computers. In short: Transistors are key to understanding and working with electronics.One item deals with "Technical application and vocational orientation".Information and ideas:• Particularly in this experiment, we recommend your students to do the additional experiment described in "Doing further research”.• See also the additional Information about LEDs.• There are two basic types of transistors, NPN and PNP. The experiment uses an NPN transistor (negative-positive-negative). NPN- and PNP-transistors have to be inserted differently to function correctly, i.e. to turn the transistors on. NPN- and PNP-transistors look the same. The part number printed on them distinguishes them from regular transistors. For example, a common NPN-transistor has the part number BC 547 or BC 548 printed on the component; a PNP-transistor may have the part number BC 548. If you use regular transistors, you can look up their datasheets online.In contrast to the wiring of a buzzer as in the first experiment, which is an electrical circuit, the transistor circuit is an electronic circuit.The transistor is key to understanding electronics. It is recommend to do the further research with all students, as this will provide additional learning and will reinforce the understanding of a transistor. When conducting both experiments and discussing them, be sure to schedule enough time for your lessons, as 45 minutes will not suffice.

Experiment

Siemens Stiftung

7. Electronics - 7.1 Light dependent resistors (student instructions)

Experimentation instructions:Detailed instructions and questions for students on conducting the experiment "Light dependent resistors”.The questions "What are the properties of a light dependent resistorshall?” shall be answered by experimenting.Information and ideas:One item deals with "Technical application and vocational orientation".

Anderer Ressourcentyp

Siemens Stiftung

A5 Properties of solar cells (link list)

Link list:
Further information on the experiment "A5 Properties of solar cells - Voltage, current and power".

The links can be used for preparing or for further study of experiments from Experimento | 10+.

Anderer Ressourcentyp

Siemens Stiftung

7. Electronics - Vocational orientation - Intro

Teaching methods:Teaching methods for the teaching unit "Vocational Orientation - Electronics”.Short outline of the topic and suggestions on teaching methods. As teaching methods for the teacher.

Experiment

Siemens Stiftung

7. Electronics - 7.2 Capacitors (student instructions)

Experimentation instructions:Detailed instructions and questions for students on conducting the experiment "Capacitors”.The questions "What are the properties of a capacitor?” shall be answered by experimenting.Information and ideas:One item deals with "Technical application and vocational orientation".

Primärmaterial/Quelle

Siemens Stiftung

Vocational Orientation - What can you expect from becoming an electrician?

Web resource: Vocational orientation course for future electricians.Students can expect from this course:an overview of the job itself,personal insight from electricians working in leading African companies and their employers,some key insights in relevant competencies like creative problem-solving,training the relevant knowledge about science, technology, engineering, and mathematics (STEM) with interactive elements. You will learn about:• sources of energy• electrical circuits• saving energy• renewable energy

Experiment

Siemens Stiftung

7. Electronics - 7.5 Capacitor/transistor circuits (student instructions)

Experimentation instructions:Detailed instructions and questions for students on conducting the experiment "Capacitor/transistor circuits”.An electronic circuit is shown in a diagram. The questions "How does the circuit shown below function and what is the importance of the capacitor in this circuit?” shall be answered by experimenting.Information and ideas:One item deals with "Technical application and vocational orientation".

Experiment

Siemens Stiftung

7. Electronics - 7.3 Transistors (student instructions)

Experimentation instructions:Detailed instructions and questions for students on conducting the experiment "Transistors”.The questions "What are the characteristics of a transistor?” shall be answered by experimenting.Information and ideas:One item deals with "Technical application and vocational orientation".

Anderer Ressourcentyp

Siemens Stiftung

Internal resistance

Information sheet:
Voltage and current sources have resistance themselves, called internal resistance.

The properties of voltage and current sources with respect to their internal resistance are explained and the significance of internal resistance in series and parallel connections of batteries and solar cells is clarified.

Experiment

Siemens Stiftung

7. Electronics - 7.4 Dark detectors (student instructions)

Experimentation instructions:Detailed instructions and questions for students on conducting the experiment "Dark detectors”.An electronic circuit is shown in a diagram. The questions "What are the properties of the circuit shown below and how does it work?” shall be answered by experimenting.Information and ideas:One item deals with "Technical application and vocational orientation".