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Timer Project Kit

Exclusive to Kitronik
Teaching Notes
Key Stage 3/4
The Timer Project Kit uses a Dual 555 Timer. Once the button has been pressed, the count-down begins and the LED lights. The buzzer sounds once the time is up.

Availability: In Stock.

Code1+ 5+ 50+
(£6.18 incl VAT)
(£4.26 incl VAT)
(£3.90 incl VAT)

The timer project uses a dual 555 timer, which once started by pressing the button illuminates an LED until the desired time out period has elapsed when a buzzer is sounded.

The duration of both the delay and buzzer sound period can be determined by the student and are easily adjusted by PCB mounted potentiometers. This allows the board to be used for a variety of applications, such as an egg timer or a timer for a game (Max time period 200 seconds, max buzzer period 10 seconds).


  • Adjustable delay and buzzer sound.
  • Maximum time period: 200 seconds.
  • Maximum buzzer time: 10 seconds.

Possible Applications Include:

  • Egg timer.
  • Timer for game.



  • PCB Length: 54mm.
  • PCB Width: 46mm.



This kit is supplied in a simple 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 2104.
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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Posted by Stu, Wednesday, 5 July 2017 on product Timer Project Kit
  • 0

    Hi Stu, The circuit should work by pushing the push to make switch, this then starts the timer. Once the time period has reached the level set by the trimmer pot then the buzzer would sound. You shouldn’t have to create the circuit again to make the buzzer sound. The push to make switch will normally be open until you push this, then it would be closed, the buzzer should sound when the switch is in the open position.

    Posted by Michael Lockhart on Monday, 8 May 2017
Posted by Stuart Sutcliffe, Sunday, 5 February 2017 on product Timer Project Kit
  • 0

    Hi Stuart, You should be able to, the only thing to bear in mind is that while the light activated switch is outputting it might keep causing the timer to start another loop once it has finished the previous loop. You would also need to connect the output of the light activated switch kit to the power input of the timer kit, you would then use a piece of wire rather than the push switch. This way the switch is always active, however power is only supplied to the board when the light kit is activated.

    Posted by Michael Lockhart on Wednesday, 3 May 2017
Posted by Chris, Thursday, 5 March 2015 on product Timer Project Kit
  • 0

    The 100uF Capacitors are only rated up to 10V, and they do not have a safety vent. So the board shouldn’t be powered by any voltage higher than 10V.

    Posted by Michael Lockhart on Thursday, 5 March 2015

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