Experiments: Introductory
To complete the Key Stage 2 range of activities you will need the following Locktronics equipment (all prices are in pounds sterling and are exclusive of VAT):
| Description | Quantity | Product No |  |
| Baseboard LK50 | 1 | 410-3000 |
| Lead Set LKLS | 1 | 410-8022 |
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| Component carriers: |
| Resistor 1K | 1 | 410-5202 |
| Variable resistor 25 ohm | 1 | 410-5212 |
| Buzzer | 1 | 410-6423 |
| Lamp holder | 3 | 410-5291 |
| Lamps | 3 | 410-2347 |
| Connecting link | 7 | 410-5250 |
| Motor | 1 | 410-4102 |
| Switch press | 2 | 410-6207 |
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| Other equipment: |
| Cells | 3 |
Circuit Diagnostics – Why won't my circuit work!
- Shows that circuits don't always work, but that there are certain problems that are easy to diagnose and fix.
- Students construct a series of "problem" circuits. For each of these they have to explain what is wrong and suggest a solution.
How Many Cells?
- Introduces students to the idea of Voltage as electrical "push" or force.
- Shows students how to use a voltmeter to measure the voltage provided by a cell.
- Students then measure the voltage provided by different combinations, noticing what happens when some are put in "backwards".
Which Switch?
- Students build simple circuits and practise explaining what the switches control.
- Students build a more complex circuit and have to predict the effect of the switches before testing them.
More Buzzers and Motors
- Bulbs and motors are investigated in terms of the effect of the amount of current.
- Discuss the energy transfers that various devices make and its direction.
- Students then investigate how a variable resistor can be used to control the behaviour of buzzers and motors.
Series and Parallel Circuits
- Introduces students to the concepts of series and parallel circuits.
- Students can then explore the effect of connecting bulbs in series.
- Students can compare the effect of connecting bulbs in parallel.
How Bright?
- Introduces controlling how bright bulbs in a circuit are, i.e. how many cells provide voltage and how many bulbs have to share that voltage.
- Students vary the number of bulbs and cells and observe the changes.
Circuit Diagrams
- Shows students a range of standard symbols for components.
- Students can compare some circuits with their diagrams.
- Students building circuits from diagrams and draw diagrams from circuits.
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