Someone mentioned the frequency fluctuates. Can you lock in a frequency or does it always fluctuate?

My unit does "waver" at about 2 Hz around the set center frequency. When in the audible region it sounds like a sound effect in an old TV show. The "wavering" is definitely an intentional design feature, not a problem with the circuitry. I watched the output on an oscilloscope and the wavering continues even as the frequency moves to the highest end of the frequency range. For any use other than a pure signal generator, like trying to drive away critters, the wavering is probably a good design feature.

If I use this device + piezo loudspeaker + bullhorn will I be able to get the desired effect on a dog about 150-200 ft away?

It works good on some dogs at that range, but others can be within 50 and ignore it. We had 3 dogs next to us and 2 of them never noticed and the 3rd one would stop barking and run for the house. He would head to the house when he was at least 200 feet away, he soon became a non barking dog.

Can this run on batteries? Or only DC power plug?

Batteries such as AA or AAA or similar chemical batteries are DC. The device does not come with a battery compartment. I guess if you attached a battery the device would work.

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KEMO Ultrasonic Signal Generator Module, Push Button Switch, Manual Operation, 1 Count

KEMO Ultrasonic Signal Generator Module, Push Button Switch, Manual Operation, 1 Count

Product ID: 122306020

Details

Operation Mode
ON-OFF
Contact Type
Normally Open
Connector Type
Screw Terminal
Brand
KEMO
Terminal
Solder

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Specifications

ASIN	B00NRH95AY
Actuator Type	Push Button
Best Sellers Rank	#233,504 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #101 in Ultrasonic Proximity Sensors
Brand	KEMO
Brand Name	KEMO
Circuit Type	4-way
Compatible Devices	Ultrasonic Sensors/Receivers
Connectivity Protocol	Wi-Fi
Connector Type	Screw Terminal
Contact Material	Metal
Contact Type	Normally Open
Control Method	Touch
Control Type	Manual
Controller Type	Ring
Country of Origin	USA
International Protection Rating	IP00
Item Weight	1 Pounds
Manufacturer	uxcell
Material Type	Metal
Model Number	4330881478
Mounting Type	DIN Rail Mount
Number of Positions	1
Operation Mode	ON-OFF
Part Number	M048N
Specification Met	CE
Switch Type	MOSFET
Terminal	Solder
Unit Count	1.0 Count
Wattage	4 Watts

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KEMO Ultrasonic Signal Generator Module, Push Button Switch, Manual Operation, 1 Count

Details

Details

Description

Specifications

Common Questions