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Dark Activated Colour Changing Night Light Kit

2.72
Easy Build
Exclusive to Kitronik
Teaching Notes
Key Stage 3
When in darkness, this Easy Build Kit generates an array of different coloured illuminations using a Colour Changing LED.

Availability: In Stock.

Code1+ 5+ 50+
2120£2.72
(£3.264 incl VAT)
£2.07
(£2.484 incl VAT)
£1.69
(£2.028 incl VAT)
OR

The colour changing LED in this kit is automatically illuminated and starts to cycle through various patterns when the light sensor has detected that is dark. The kit uses the light activated board with a colour changing LED. The kit includes the light activated switch project kit (part 2112), accompanied by a battery clip, battery cage and rainbow LED. All individually bagged and ready for your students to build.

Features:

  • When in darkness, this Easy Build Kit generates an array of different coloured illuminations using a Colour Changing LED.

Contents:

Dimensions:

  • PCB Length: 53mm.
  • PCB Width: 25.5mm.

Requires:

Resources:

Note:

  • This kit requires soldering.

Free samples:

Teachers can order a sample of this kit (one per school) here. You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2120.
Note: this service is only offered to schools for evaluation purposes only.

Buy British:

 This kit is designed and manufactured in the UK by Kitronik.

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Questions:

Posted by Don, Tuesday, 28 June 2016 on product Dark Activated Colour Changing Night Light Kit

Question:

I am having difficulty in trying to get the assembled circuit to work. I have checked all the usual things- Component positions, dry joints etc. When connected to the battery pack nothing happens-with or without LDR covered and variable resistor adjusted. If connected to a mains power supply (set to 6v output), the LED lights briefly before dying off. If I repeat this process the same thing occurs. Covering the LDR and/or adjusting the variable resistor makes no change to the circuit function. Do you have any suggestions?

Answers:

  • Posted by Rob Haywood on Tuesday, 28 June 2016

    There are two common fault on this circuit:

    -          A wire link is required in place of R3 and is often missed out.

    -          The input and output connections look similar and can be connected wrong. I’d check that you have the power supply connected to the connection labelled power.

    Further fault finding can be found in the teaching notes which can be downloaded off this product page.

    If you are still struggling to get it to work don’t hesitate to get back in touch.

    Best regards

    Michael 

Posted by Nick Heal, Monday, 16 May 2016 on product Dark Activated Colour Changing Night Light Kit

Question:

Hi, we'd like to replace the battery pack with a smaller 9V rectangular battery so we can make a more compact housing for the whole unit. It says in your notes that the LED has a built in resistor so only the wire connector is needed in R3. However can you state what resistor we would need to put in R3 if we wanted to use a 9V battery to protect the LED?

Answers:

  • Posted by Michael Lockhart on Monday, 16 May 2016

    The problem with using a resistor and a colour changing LED is that it is very difficult to use the correct resistor. As the colour changes so does the current requirement of the LED, as such some colours require more or less current to create that particular colour. If you put a resistor with a high value in you would likely stop the LED changing to certain colours, a low value resistor and when the colour changes from a high value current draw to a low value you could damage the LED as it isn’t protected correctly. As such it may be better looking into using AAA batteries instead and keep the power source at 6V’s as per how the kit has been supplied.

Posted by Ciaran Brennan, Wednesday, 4 May 2016 on product Dark Activated Colour Changing Night Light Kit

Question:

Just a point on your LDR circuit, the output is constant and the LED won't turn on, took out LED and verified it's working ok, removed both transistors, tested with multimeter and it's ok and variable resistor is working perfectly, LDR is also working, something seems to cause the output to not turn off when light hits it.

Answers:

Posted by Tim Barber, Tuesday, 12 January 2016 on product Dark Activated Colour Changing Night Light Kit

Question:

Can I substitute a 10mm rainbow cycling LED for the one provided? It emits a lot more light so could affect the circuit? Tim

Answers:

  • Posted by Aaron Sturman on Tuesday, 12 January 2016

    Yes you can substitute the 5mm LED for the 10mm one, electrically it is the same.

Posted by Sharon Lamble, Wednesday, 2 December 2015 on product Dark Activated Colour Changing Night Light Kit

Question:

Can you suggest a suitable switch to add to the circiut?

Answers:

Need a question answering before you buy? Then ask our technical team.

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