Class Set Electrical Control

Everything around the topic electrical circuits

Electrical circuits from the basis for countless devices, from simple light switches used to turn on indoor lights to kitchen appliances to robots and computers. Electrical phenomena and technologies can be vividly illustrated, experienced, and understood using low electrical voltages, for instance from a battery.

How does a flashlight work?
How do i turn an electric motor on and off?
How can i change the rotational direction of a motor?
How can i control a light from multiple points, for instance a stairwell light?
How do simple electrical controller work?

Number of students

Up to 30 pupils per kit

Learning objectives

Basic principles of electrical circuits

Time required

Each task contains detailed time information for lesson structuring

Grade level

Primary level

About the product

Didactic material

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Topics and learning objectives

Task 1: We light up a lamp

Topics: Simple circuit with pole-turning switch and a light-emitting diode (“LED”).
Learning objectives:

Power supplies have two poles

Current can flow when a circuit is closed

Flowing current can cause a lamp to light up

With a light-emitting diode, the correct polarity is important

Time required: 45 min
Task 2: We make a motor rotate

Topic: We operate a DC motor and change its direction of rotation
Learning objectives:

A DC motor rotates when (sufficiently strong) current flows through it

We can change the direction of rotation of the motor by reversing the polarity

Time required: 45 min
Task 3: Switching on and off with a momentary-action switch

Topic: Function and task of a toggle switch as a control element. In this experiment, we use it to switch an LED on and off
Learning objectives:

The push-button can allow current to flow through it or interrupt the current flow.

It can be connected as a “normally open contact” or as a “normally closed contact”. We investigate this in detail.

Time required: This and the next experiment (series connection of two push-buttons) can be set up and the experiments carried out together in 45 minutes.
Task 4: Series connection of push-buttons

Topic: We connect two push-buttons in series and observe the behavior.

Learning objectives:

Two push-buttons connected in series allow a load (LED or motor) to be switched on only when both push-buttons are pressed.

Different controls by combining the push-buttons as normally closed or normally open contacts.

Time required: 45 min (possibly together with task 3)
Task 5: Parallel connection of push-buttons

Topic: We connect two push-buttons in parallel and thus obtain an OR operation
Learning objectives:

Switching on a load from two locations

The lamp lights up when you press one of the two buttons or both at the same time

Time required: 45 min (possibly together with task 4)
Task 6: Changeover circuit

Topic: We control an LED with two push-buttons. This circuit can be used, for example, to switch a room light on or off from two locations.
Learning objectives:

Use of both the normally open and normally closed contacts of a push-button switch

Setting up a changeover circuit from two push-buttons

Time required: 45 min
Task 7: Short-circuit brake

Topic: Stopping a motor directly without “coasting” or “overrunning”
Learning objectives:

Short-circuiting a load (motor) is permitted and useful in contrast to short-circuiting a power supply (battery)

Time required: 30 min
Task 8: Left-right-off with two buttons

Topic: Basic circuit for motor control
Learning objectives:

Using two push-buttons to control (left/right/off) a DC motor

Understanding of electrical circuits

Time required: max. 45 min (can be easily combined with task 9)
Task 9: Pole-reversing switch with two connected push-buttons

Topic : From experiment 8, we first swap the working and idle connections of a push-button. By cascading the push-buttons to form a unit, we obtain a compact pole-reversing unit.
Learning objectives:

To consolidate the left/right/off circuit from experiment 8.

Function and construction of a “pole-reversal button”.

Time required: 45 min