As part of a robot project, I'm trying to develop a sound activation system so that the robot will start up upon detecting a 3kHz tone.
I have a good idea of the kind of circuit I want to build (a microphone followed by an amplifier and a LM567 tone detector IC) but I'm not too sure where to order the parts from (its my first time ordering my own parts).
I found a suitable buzzer and microphone on radioshack
http://www.radioshack.com/product/index.jsp?productId=2062404&cp#273-075
http://www.radioshack.com/product/index.jsp?productId=2062216&cp#270-092
but I'm living in Ireland and radioshack only delivers in the U.S.
I found a buzzer on Maplins http://www.maplin.co.uk/Module.aspx?ModuleNo=3221&doy=search but I'm not too sure about the microphone.
What kind of a microphone would be best suited to this circuit? The original one which I was advised to get from radioshack is a electret one. Does anyone know where I can find a site that will deliver this kind of a mic to Ireland? Preferrably off the same Maplin site. I have found a few possible candidates but I'm not too sure how essential the type of mic is to the overall design. Any help or advise offered would be greatly appreciated.
I have a good idea of the kind of circuit I want to build (a microphone followed by an amplifier and a LM567 tone detector IC) but I'm not too sure where to order the parts from (its my first time ordering my own parts).
I found a suitable buzzer and microphone on radioshack
http://www.radioshack.com/product/index.jsp?productId=2062404&cp#273-075
http://www.radioshack.com/product/index.jsp?productId=2062216&cp#270-092
but I'm living in Ireland and radioshack only delivers in the U.S.
I found a buzzer on Maplins http://www.maplin.co.uk/Module.aspx?ModuleNo=3221&doy=search but I'm not too sure about the microphone.
What kind of a microphone would be best suited to this circuit? The original one which I was advised to get from radioshack is a electret one. Does anyone know where I can find a site that will deliver this kind of a mic to Ireland? Preferrably off the same Maplin site. I have found a few possible candidates but I'm not too sure how essential the type of mic is to the overall design. Any help or advise offered would be greatly appreciated.