Ultrasound receiver

[ivconic]

[Nandor]

Such a nice project What is the transmit frequency?

But why dens mankiy why why???

[ivconic]

Most effective rodent repeller that i made so far.
Transformerless, works directly on AC220v or DC12v.
15 meters effective distance, 120 degrees effective coverage.

[ivconic]

Such a nice project What is the transmit frequency?

But why dens mankiy why why???

40kHz