zhensheng87
New Member
Hi, actually it doesn't work. Even you get the real device selling at the market also won't work. The high frequency to drive the pests away is just a hoax.......I even tried it on different pests and rodents
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My city and the cities around me got rid of the mosquitos by putting safe larvacide in rain sewers and ponds.Hi there. Did you actually build it and then tested it to see it didn't work?
We discussed the old circuit in this thread. It uses parts that are not made any more and I think it had some errors.
Maybe you can re-design it so it uses modern parts and works but where will you find a transducer that works at 30kHz to 40kHz?
Its oscillator operates at 40kHz to 80kHz but its output frequencies are half.
Answer this one.but where will you find a transducer that works at 30kHz to 40kHz?
That works 80 to 90 Khz and is to small to have any range. Try again!**broken link removed**
That works 80 to 90 Khz and is to small to have any range. Try again!
The transducer is used for medical ultrasound imaging. its range through skin is a couple of cm.
The circuit in the datasheet of the transducer should be used, not that old circuit.
Yes you are right that is only the driver.Perhaps this is only the transmit driver portion and needs something else?
I dont know its untested.Ok, I'll settle for a constant 80kHz. Do you think the circuit will work?