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LED Picture Frame Kit

2.95
Easy Build
Exclusive to Kitronik
Teaching Notes
Key Stage 3
This kit allows you to illuminate the edge of a picture frame using a number of LEDs. Control the time that the LEDs are lit by setting a trimmer potentiometer.

Out of stock. Orders can be placed and will be despatched once in stock.

Code1+ 5+ 50+
2146£2.95
(£3.54 incl VAT)
£2.20
(£2.64 incl VAT)
£1.90
(£2.28 incl VAT)
OR

This kit allows you to illuminate the edge of a picture frame using a number of LEDs. This happens for a period of time when the button is pressed. The duration is set using a trimmer potentiometer and can be anything from a few seconds to 30 minutes. The student can choose which LEDs they would like to use. These are connected to the terminal block (along with a current limit resistor). The board can drive 200mA, which is about 10 high brightness LEDs.

This kit includes:

PCB dimensions: 58mm x 28mm.

This kit is supplied as a pack of parts and requires soldering.

Click here to download the essential informationpdf_icon.gif

Click here to download the full teaching resources pdf_icon.gif

Selecting LEDs for using with the circuit.

The circuit can be used with a variety of LEDs. Below are a selection of LEDs that can be used. Also listed is the current limit resistor that will be required if four LEDS are used.

3504 Standard red33ohm
3505 Standard green33ohm
3506 Standard yellow33ohm
3542 Standard white22ohm
3543 Standard blue22ohm
3507 Ultra bright red33ohm
3524 Ultra bright white68ohm
3537 Ultra bright blue68ohm

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 2146.
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.

Ask Kitronik LED Picture Frame Kit
Video LED Picture Frame Kit
A video about our LED Picture Frame Kit 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.

Questions:

Posted by Dan, Friday, 18 December 2015 on product LED Picture Frame Kit

Question:

Is there a way to change the components on the board - say the capacitor, so that if 12V is used the discharge of the batteries is minimised without the use of the push button? The circuit works perfectly otherwise.

Answers:

  • Posted by Michael Lockhart on Friday, 18 December 2015

    As per your previous question this kit isn’t designed to run off 12V’s. The push button switch is only used to trigger the circuit, as there is no power switch on the circuit it is in a constant state of monitoring for the switch being pressed. If you want to conserve power you would need to add a power switch between the positive wire on the battery box and the positive input on the PCB.

Posted by Darren Macdonald, Wednesday, 25 November 2015 on product LED Picture Frame Kit

Question:

Do you do this kit with a USB power version?

Answers:

  • Posted by Michael Lockhart on Wednesday, 25 November 2015

    We dont do this kit with a USB power lead, this is the only version we stock.

Posted by Dan, Monday, 16 November 2015 on product LED Picture Frame Kit

Question:

Is there any reason why the batteries would discharge over say a couple of months, when the push button has not been used? I am putting 12V through the board with no problems powering some bright LED's.

Answers:

  • Posted by Michael Lockhart on Monday, 16 November 2015

    Batteries will slowly discharge over time, also this circuit isn’t designed to work off 12V’s and as such there may be some current leaking through the circuit.

Posted by Dan, Friday, 2 January 2015 on product LED Picture Frame Kit

Question:

Can the 200mA output be increased? If so, how do you advise?

Answers:

  • Posted by Aaron Sturman on Friday, 2 January 2015

    Hi,

    You could use a different transistor with a higher current rating such as the BC337. This has a maximum continous current rating of 800mA. If you need more current than that you likely need a different circuit like a motor driver board or similar.

Posted by Dan, Tuesday, 23 December 2014 on product LED Picture Frame Kit

Question:

If you change the capacitor to 1000uF, would that then give the board more mA output current?

Answers:

  • Posted by Michael Lockhart on Tuesday, 23 December 2014

    The capacitor won’t have any impact on the output of the board, this will just increase the time of discharge and thus the LED’s will light for longer. The FET will determine the maximum output, in this case the maximum the FET and board can handle is 200mA.

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