Nightlight
Details of this project are published in the spring 2006 edition of Electronics Education published by the IEE.
A kit of parts is available from Rapid Electronics order code 70-2600 and from Electron Electronics order code 525-1560.
Circuit diagram
Nightlight circuit - the values of C1 and R4 set the time delay
| ¡ | A CircuitWizard simulation of the nightlight circuit can be downloaded. |
| ¡ | A Crocodile Technolgy simulation of the nightlight circuit can be downloaded. |
PCB assembly
Exploring the time delay
Suggestion for practical work
| ¡ | A useful way to explore different timing component values is to fit turned pin sockets instead of C1 and R4. This provides a means of 'plugging in' different values for C and R. Suitable part from Rapid is: 22-0465 20pin SIL connector |
| ¡ | A set of nightlights equipped with turned pin sockets can provide the basis for a useful collaborative class investigation. Each group contributes timing data. |
| ¡ | Collected data can pooled and put into a table for subsequent use in designing for required timings. |
| ¡ | Use of different values for C1 and R4 can lead to a valuable discussion about multipliers and how to interpret them. |
Student workbook
 | Download student workbook kindly supplied by Vic Leggatt |
Pupil's work
| ¡ | Colourful examples form Caroline Chisholm School, Northampton using 'Fun and Fancy' acrylic paints which glow when they are lit up from behind. |
| u | Do you have examples of pupil's night light work to display? If so then please get in touch. |
