making mosquito high frequency to repel

I don't know if a piezo speaker/buzzer gets you the right frequencies, but here is an example circuit from Oomlout to make sound:

http://www.oomlout.com/oom.php/products/ardx/circ-06

For the high frequencies, maybe keep an eye on nearby dogs and cats when testing - they can hear up to something like 65-85KHz.

And I guess you can do testing with a few pop-bottle and yeast mosquito traps (one with your repeller, the other without) - that's assuming those traps work

Good luck, hope it works out!

Cheers,

-Nico

Did not see any specs on FreQ range on oomlout.

Will need a High Freq speakers but also may have to test with lower freq.  I think some type of noise will repel them.

That Oomlout example is only showing how to hook up a piezo speaker/buzzer and gives a very basic example of how to make some tones, but you can modify the code to get to your desired frequency. Look at their comments for notes, for example:

* note      frequency      period      timeHigh

* c     261 Hz     3830      1915 

I'm guessing that changing timeHigh to 19 would give you close to 26,100 Hz, or 26 kHz.

You'd have to do some math to figure out the required delays to get the desired frequencies (smaller delay = higher frequency), but the rest is pretty much there for you to use.

Cheers,

-Nico

@chinino

Why, in the face of evidence to the contrary, are you so convinced that some noise at some high frequency will upset mosqitos. ?

Here is a link to supplement Michael Tria's post.

http://www.bbc.co.uk/news/magazine-20669080

Before you start trying to make any noise try to find some research results that indicate what sort of noise might be effective.

If you can find any then post a link here I'll be very happy to advise you about how to generate the sounds.

MK

There are people who want to believe that the Second Law of Thermodynamics can be violated. That the circle can be squared. That there is a map that need more than four colors. That even though the flu vaccine is a killed vaccine, that it will give them the flu.

Most of the time such antics keep them busy, and out of harms way. Sometimes, like Andrew Wakefield and the phony MMR-autism link, they do real damage, and kill thousands. Looking for some fx that will frighten away mosquitos is a relatively harmless though fruitless pastime.

There are people who want to believe that the Second Law of Thermodynamics can be violated. That the circle can be squared. That there is a map that need more than four colors. That even though the flu vaccine is a killed vaccine, that it will give them the flu.

Most of the time such antics keep them busy, and out of harms way. Sometimes, like Andrew Wakefield and the phony MMR-autism link, they do real damage, and kill thousands. Looking for some fx that will frighten away mosquitos is a relatively harmless though fruitless pastime.