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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.

case 1 lit
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An example of a Colourful Mood Light.
Colour Changing LED demo and explanation
Video Colour Changing LED Demo & Explanation
Colour Changing LED demo and explanation video.
Dark Activated Night Light
Video Dark Activated Colour Changing Night Light Demo
Dark Activated Colour Changing Night Light demo video.
Ask Kitronik Night Lights
Video Night Lights
A video about our Night Light Kits taken from our Ask Kitronik Live event 2012.
potential-divider-voltage-divider-whiteboard-150
How A Potential Divider / Voltage Divider Works
A guide to understanding how a Potential Divider / Voltage Divider works. What is a Potential Divider / Voltage Divider? This is a simple circuit which takes advantage of the way voltages drop across resistors in series.
mood light
Colour Changing Night Light – How It Works
Learn how to introduce Colour Changing LEDs to mood light projects.

Questions:

Page:
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Posted by dave cruse, Tuesday, 5 September 2017 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    Hi Dave, Yes you could change it to a single colour Led, however you would also need to change the wire link in R3 to a suitable rated resistor, this would depend on the LED you are using.

    Posted by Michael Lockhart on Wednesday, 10 May 2017
Posted by steve hall, Friday, 17 February 2017 on product Dark Activated Colour Changing Night Light Kit
Posted by John, Friday, 6 January 2017 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    Hi John, Yes the kit could be powered via a USB lead. The colour changing LED can handle a 5V supply so there wouldn’t be any issues. 5v’s is the maximum the kit could be powered with however.

    Posted by Michael Lockhart on Friday, 6 January 2017
Posted by Don, Tuesday, 28 June 2016 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    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 Rob Haywood on Tuesday, 28 June 2016
Posted by Nick Heal, Monday, 16 May 2016 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    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 Michael Lockhart on Monday, 16 May 2016
Posted by Ciaran Brennan, Wednesday, 4 May 2016 on product Dark Activated Colour Changing Night Light Kit
Posted by Tim Barber, Tuesday, 12 January 2016 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

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

    Posted by Aaron Sturman on Tuesday, 12 January 2016
Posted by Sharon Lamble, Wednesday, 2 December 2015 on product Dark Activated Colour Changing Night Light Kit
Posted by Geoff Jennings, Thursday, 29 October 2015 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    The LED that is used in this kit is the 5mm colour changing LED - https://www.kitronik.co.uk/3527-colour-changing-5mm-diffused-led-750mcd.html

    Posted by Michael Lockhart on Thursday, 29 October 2015
Posted by Alan Grundy, Wednesday, 7 October 2015 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    This kit uses a colour changing LED, and as such it doesn’t flash. However you could use the standard light activated kit, 2112 and include a flashing LED instead, we sell a range of flashing LED’s https://www.kitronik.co.uk/3538-red-flashing-5mm-water-clear-led-30deg-3500mcd.html  The 2112 kit measures 53mm in length by 25.5mm in width, although you could mount the PCB elsewhere and have the LDR and LED’s on flying leads in the position you require them.

    Posted by Michael Lockhart on Wednesday, 7 October 2015
Posted by Mike, Wednesday, 5 August 2015 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    You can run this kit from a 5V power supply with no changes needed, however you can run this kit on a supply up to 9V but you would need to replace the 0 Ohm resistor to ensure the LED is protected.

    Posted by Michael Lockhart on Wednesday, 5 August 2015
Posted by Terry, Friday, 13 March 2015 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    Yes 3.6V is approximately the lowest voltage you can use. However the disadvantage of using just enough voltage to begin with is that the LED will go out before the batteries are completely flat so there will be some wasted battery life. You would be better using a higher starting voltage to begin with, this would give you a longer running time and less waste on the batteries.

    Posted by Michael Lockhart on Friday, 13 March 2015
Posted by Matt, Monday, 26 January 2015 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A:

    Yes this can be done, however the power would need to be spilt off with a potential divider at 5V, this would then need to be used to power the night light kit. Any voltage above 5V would cause the trigger point to change and would cause the light activated part to not work correctly.

    Posted by Michael Lockhart on Monday, 26 January 2015
Posted by Temi, Friday, 17 October 2014 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A: Yes, that would be fine.
    Posted by Aaron Sturman on Friday, 17 October 2014
Posted by Paula Slater, Monday, 22 September 2014 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A: Hi, the reason is because we use the same PCB for this kit as we use for our light/heat activated switch kits which can drive up to half an Amp. For driving a single LED there isn't any need for it. A lot of people were buying the light activated switch kit and a colour changing LED + battery cage so we made it into a kit. to make it easier to buy. Electronically speaking a single transistor would be fine.
    Posted by Aaron Sturman on Monday, 22 September 2014
Posted by Ray Cilia, Thursday, 31 July 2014 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A: Hi, Unfortunately that won't work. The output is roughly 0.9V lower than the input. So if you use an input of 2xAA (3V) that gives 2.1V maximum as an output. The colour changing LED needs at least 2.7V to light up. You could do it with 3xAA, the disadvantage there though is that the LED will go out before the batteries are completely flat so there will be some wasted battery life.
    Posted by Aaron Sturman on Thursday, 31 July 2014
Posted by Clive, Sunday, 27 April 2014 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A: Sorry for the delay I wanted to test it for myself! Yes it works fine from USB. It normally runs from 6V but I tested it down to 4V and it worked fine. A USB lead supplies 5V so that?s ok. We sell a cable that goes into a USB port and the other end has two wires, positive and negative. You just solder these into the PCB where you would normally put the batteries. The product code for the cable is 4101 and the product page is here https://www.kitronik.co.uk/products/batteries-holders-chargers-usb-power/power-supplies-and-usb-power/usb-power-lead/
    Posted by Aaron Sturman on Monday, 28 April 2014
Posted by Corinne Tye, Friday, 11 April 2014 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A: Yes you can connect more than one LED, though the LEDs won't say in sync with each other. The number of LEDs that you can connect will be determined by the gain of the transistor I suspect that you should be able to connect 3 or 4 LEDs. If you connect more than the gain allows for you won't damage anything, it will just be a case of the LEDs not being as bright and possibly having the colour sequence restarting from the beginning.
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by jonmartlew, Friday, 11 April 2014 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A: There's a page here that explains bulk discounts, https://www.kitronik.co.uk/ordering/bulk-buy-discount-for-kits/ if you put the number you want into the product page and click add to cart the cart will show the discount you would receive.
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by Michelle Westwood, Friday, 11 April 2014 on product Dark Activated Colour Changing Night Light Kit
  • 0
    vote
    A: Hi Michelle, they probably were talking about the power rating of the soldering iron. For our kits we would advise something around 18-22W, more powerful soldering irons are available but they heat things up much more quickly which can mean students sometimes burn the board or components and damage the tracks. That said, the rating of the iron itself can't stop the kits from working. I'd recommend you send some photos of the kits that aren't working to support@kitronik.co.uk so I can take a look at them.
    Posted by Matt Macleod on Friday, 11 April 2014

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