Helpful people,
First, thanks for all the help you guys gave me for the hen house project a few months back. I'm trying to expand the design bit by bit.
I'm trying to incorporate a cat/dog/fox deterrent which will be set off when required. I've read various sources and it seems the ultrasonic frequencies of commercial items are of the order of 18-24kHz.
Q1: Is it possible to create a specific frequency using a Picaxe. SOUND just lets you choose a number up to 255 - what frequencies are they?
Q2: Assuming Q1 is positive, would it then be fairly trivial to sweep the full frequency range from 18 to 24kHz in a matter of seconds?
I'm not too hot on piezo sounders and resonant frequencies when applied to electronics, so be gentle!!
Thanks in advance!!
P.S. I have an active 28X2 (loads of outputs left) or an 08M (one output left) to attach the (as yet unpurchased) piezo to in the chicken run - any preference?
First, thanks for all the help you guys gave me for the hen house project a few months back. I'm trying to expand the design bit by bit.
I'm trying to incorporate a cat/dog/fox deterrent which will be set off when required. I've read various sources and it seems the ultrasonic frequencies of commercial items are of the order of 18-24kHz.
Q1: Is it possible to create a specific frequency using a Picaxe. SOUND just lets you choose a number up to 255 - what frequencies are they?
Q2: Assuming Q1 is positive, would it then be fairly trivial to sweep the full frequency range from 18 to 24kHz in a matter of seconds?
I'm not too hot on piezo sounders and resonant frequencies when applied to electronics, so be gentle!!
Thanks in advance!!
P.S. I have an active 28X2 (loads of outputs left) or an 08M (one output left) to attach the (as yet unpurchased) piezo to in the chicken run - any preference?