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2139_large_timed_night_light_kit

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Timed Night Light Project Kit

3.75
Exclusive to Kitronik
Teaching Notes
Key Stage 3/4
The Colour Changing LED on this kit turns on when it goes dark and stays on for up to 30 minutes.

Availability: In Stock.

Code1+ 5+ 50+
2139£3.75
(£4.50 incl VAT)
£2.95
(£3.54 incl VAT)
£2.65
(£3.18 incl VAT)
OR

The colour changing LED on this kit turns on when it goes dark and stays on for a period of time.

This makes a good night light and because the LED is only on for a small amount of time the batteries last much longer than a light that is on all night.

There is an on board trimmer to set the light level at which the LED turns on and another trimmer to set how long the LED stays on for. The maximum duration is about 30 minutes.

When set to 15 minutes and activated once a night the batteries will last two months.

Features:

  • Adjustable light level sensor.
  • Adjustable length of light time.

Contents:

Dimensions:

  • PCB Length: 53mm.
  • PCB Width: 41mm.

Requires:

Resources:

This kit is supplied in a grip seal bag.

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 2139.
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.

Physical characteristics:

  • PCB Length: 53mm.
  • PCB Width: 41mm.
  • PCB Component Count: 15.

Electrical characteristics:

  • Voltage Nominal: 4.5V.
  • Voltage Range: 2.7V - 5V.
  • Standby Current: 0.3mA.
  • Current Max at Nominal Voltage: 49mA.
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Questions:

Posted by ian higgins, Wednesday, 18 January 2017 on product Timed Night Light Project Kit

Question:

Newbie question, but would it be easy to use a non-colour changing LED instead? Ideally I'd want to use either an off white, yellow or a red... am I right in thinking I'd have to look at LEDs with 750mCd or less?

Answers:

  • Posted by Michael Lockhart on Wednesday, 18 January 2017

    Hi Ian, If you wanted to swap the colour changing LED for a standard LED you could choose from the majority of the LED’s that we stock, what you would need to do is put a resistor in series with the Led to prevent it from being damaged as a colour changing LED doesn’t require a resistor. If you find an LED you won’t you can then use the following page to work out what resistor is needed, https://www.kitronik.co.uk/blog/led-resistor-value-calculator

Posted by Thomas Tickell, Monday, 21 November 2016 on product Timed Night Light Project Kit

Question:

Hello! I would like to know, Can i add 9 multi-coloured LED's to this circuit without any modification to the circuit itself? i am making a GCSE product, and i need more LED's to make the product look aesthetically pleasing. If i cannot, what would you recommend?

Answers:

  • Posted by Michael Lockhart on Monday, 21 November 2016

    Hi Thomas, The board can handle an output of 200mA due to one of the components, generally LED’s draw around 20mA, as such you wouldn’t be able to exceed the maximum current limit of 200mA. Colour changing LED’s like the one used in the kit vary on how much current they draw depending on the colour they are producing and could peak at around 50mA.  If you are using different LED’s to the one that is supplied in the kit you will need to work out what resistor values are needed for each coloured LED. 

Posted by Thomas Tickell, Monday, 21 November 2016 on product Timed Night Light Project Kit

Question:

Can i ask what the dimensions of the circuit board are? i an thinking of insetting it into some wood, and i need to know before i buy the kit.

Answers:

  • Posted by Michael Lockhart on Monday, 21 November 2016

    Hi Thomas, the PCB has the following dimensions Length: 53mm, Width: 41mm.

Posted by craig gwilliam, Wednesday, 6 January 2016 on product Timed Night Light Project Kit

Question:

is it possible to drive 3 LEDs using this circuit board

Answers:

  • Posted by Michael Lockhart on Wednesday, 6 January 2016

    This kit should be fine to power 3 LEDs, however please beware in mind that if you want to use a standard LED then you would need to ensure a resistor is used to protect the LED and stop it burning out. This is due to the circuit puts the full voltage of 3xAA batteries across the LED which can be up to 4.8V

Posted by jim dinne , Wednesday, 17 December 2014 on product Timed Night Light Project Kit

Question:

having bought 80 of these kits for school use I would like to ask can you move the pads for the fets further apart. the fets have long enough legs but the kids are finding it very tricky to keep the pads seperate.

Answers:

  • Posted by Aaron Sturman on Wednesday, 17 December 2014

    Hi, we do try to space the pads to make it easy for people to solder so we will look into those ones for you. We have a lot of stock of the current PCBs though so any changes would be a while away.

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