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Clap Switch Project

<p>Build a switch circuit that responds to sharp sounds like clapping your hands, etc. <BR><BR><B><A href="/pdf/70-2570_2.pdf">Teachers notes are available to download at our Education Resources site.</A></B></p>
  • Kit contains all components including circuit board
  • 3A changeover relay output
  • Circuit counts two claps before operating to avoid false triggers
  • Operates from 6 to 20V
  • Component count 36
  • Circuit board dimensions: 55 x 50mm
  • Also available as a money-saving classpack of 20 kits packed in a Gratnells tray
  • Suitable for Key Stages 2, 3 & 4 (ages 7 to 16)
Order codeMftrs Part No.
70-2570KITClap switch project
70-2571CLAPSWITCH PCBPCB only
70-2602KITClasspack of 20
*Question functionality currently disabled


25 August 2014 Question by: Shakeel
Q. I have used this circuit for my class year10 in the past and it was very beneficial to explain the function of components and somewhat the circuit. There had been limitation to explanation in detail because of no circuit availability. Would it be possible to have a circuit diagram of this project. to expand it further for educational point of view, it would be really useful.
A. Hi Shakeel. Thank you for your question. Unfortunately we do not have a published circuit diagram, all the available information is in the data sheet.


16 April 2014 Question by: Luke
Q. Am I able to connect other outputs on this?
A. Hi Luke. Thank you for your question. The on board relay can be used to switch other outputs.


16 December 2012 Question by: Jack
Q. What are you meant do with all the metal clips?
A. Hi Jack. Thank you for your question. The clips go on the wires then they go into the plastic housings to make up the connectors that plug into the board.


13 March 2012 Question by: Conrad | Product code: 70-2570
Q. I assume this kit includes all the parts shown in the image. And is a circuit diagram supplied as well?
A. Hi Conrad, yes the kit includes all the components shown and the PDF includes a board layout.