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| Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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20th Mar 2018, 10:38 pm
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#1 |
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Nonode
Join Date: Jun 2007
Location: Coulsdon, London, UK.
Posts: 2,163
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Piezoelectric tweeters
I want to buy an inexpensive tweeter to create a vermin scarer.
I will use ultrasonic frequencies to avoid any nuisance to people. The cheap plastic piezo tweeters do not give much information in their specifications. Some are described as high impedance, others as 8 Ohm. I though they were mainly high impedance and capacitive in nature. I realise that the impedance will vary with frequency, but are they really 8 Ohm? |
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20th Mar 2018, 11:07 pm
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#2 |
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Moderator
Join Date: Dec 2010
Location: Exeter, Devon and Poole, Dorset UK.
Posts: 6,863
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Re: Piezoelectric tweeters
Don't know which particular pest you are trying to deter
 However Cat scarers are available for less than £10 solar powered to boot. Much cheaper than a photon torpedo and less damage to the garden  Hardly worth the bother to build one at that sort of price. I understand they also deter foxes, deer and teenagers Cheers Mike T
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Invisible airwaves crackle with life or at least they used to  Mike T BVWS member. www.cossor.co.uk |
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