I’m trying to build a prototype of a device to scare deer from a yard. It would consist of a motion sensor, with day/night/always-on choices, that would power a 6’ dancing tube guy (like at a car wash). I have a sensor, I think they call it a PIR, that gives off a 3vdc pulse when activated and another 3vdc pulse when it shuts off. The correct relay will activate the dancing guy which has a 110vac, 2.1amp motor. I’ve been told that I need an impulse latching relay to connect the PIR to the fan motor. I need to know exactly what relay I’d need. Thank you!

 

I think they call it a PIR,

Post a link to this PIR module please and welcome to the Forum.

 

What power sources are available for the sensor and the latching relay /module / circuit?

ak

 

Don't you need to determine which pulse (motion sensed, motion not-sensed) activates the lamp?

 

I believe this is the PIR Sensor the TS has.
Timing cycle for the triggering.
Not sure about this line:
"Single-pulse mode can be used to detect an object entering or exiting the PIR's field-of-view, while dual-pulse detection can be used to detect an object entering and leaving the view area." ???

 

I would just get a different PIR and avoid the complications.

 

I would just get a different PIR and avoid the complications.

I wish I could find one with that daylight feature.

 

What power sources are available for the sensor and the latching relay /module / circuit?

ak

The sensor is powered by 4 AA batteries and the fan is a normal 110vac household current.

 

I believe this is the PIR Sensor the TS has.
Timing cycle for the triggering.
Not sure about this line:
"Single-pulse mode can be used to detect an object entering or exiting the PIR's field-of-view, while dual-pulse detection can be used to detect an object entering and leaving the view area." ???
View attachment 340198

The PIR has a duration timer which has a second pulse at the end of the time.

 

What power sources are available for the sensor and the latching relay /module / circuit?

ak

4 AA batteries for the PIR and a 110vac for the fan motor.

 

The PIR has a duration timer which has a second pulse at the end of the time.

Have you verified this second pulse?
A link to this PIR?

 

Have you verified this second pulse?
A link to this PIR?

yes.

 

the dancing guy • • • has a 110vac, 2.1amp motor.

Is that start-up current or running current. If it's running current then the start-up current will be a fair bit higher. Whatever PIR you choose you're going to need an amplifier circuit to amplify the available amount of current in order to protect the PIR circuitry.

What's your budget?

Do you have (can you provide)

A link to this PIR?

 

Is that start-up current or running current. If it's running current then the start-up current will be a fair bit higher. Whatever PIR you choose you're going to need an amplifier circuit to amplify the available amount of current in order to protect the PIR circuitry.

What's your budget?

Do you have (can you provide)

this is the best I can do https://tinyurl.com/vytzp5b3

 

this is the best I can do https://tinyurl.com/vytzp5b3

Can you post an actual photo of the front and back of the PIR ?

 

this is the best I can do https://tinyurl.com/vytzp5b3

OK, Great. But we need to know the startup current of the motor.

For example:
Motor current 2.1A (running)
Motor current 10A (startup)

If your sensor can handle 3 amps and your motor is going to draw 10 amps every time it starts up - your PIR is going to RIP.

 

The simpler approach will certainly be an AC mains powered PIR security light system intended to power two 100 watt floodlights. If you can get one with a magnetic relay that will be the very best choice. It is all in one package, already waterproof, and it already has a built in "ON" timer, usually for either 5 minutes or half an hour.
The TS might possibly be able to operate a regular 5 volt DC controlled solid state relay that can switch ten amps. That would be the other simple scheme.

 

The simpler approach will certainly be an AC mains powered PIR security light system intended to power two 100 watt floodlights.

Thought about this as well. Also thought about one of those lamp screw base plug adapters. Decided against that approach because of two reasons: First, the TS wants this to operate 24/7, day/night. But there's a simple workaround on that - covering the photo sensor. Second, because this is to control a fan motor, the likes of which inflates those Jiggly Man's. Y'know, the ones you see on sidewalks drawing attention to an establishment. It could easily blow the circuitry when the motor repeatedly starts up. Even if it has a relay, it's not likely going to like all that current being drawn through it. The points may burn out or weld. So the simple approach - worth considering - will require further accouterments. I.e. a heavier switching circuit.

Also, we don't know if that screw in plug adapter would work. The fan motor may have 3 wire plug whereas the screw in plug adapter only has two. So we're beginning to rebuild Frankenstein. Simple? Yes. Practical? Eh! Within the TS budget? We don't know. Startup current of the motor - again, we don't know.

 

Can you post an actual photo of the front and back of the PIR ?

 

OK I've seen these before.
The 3 volt pulse activates a latching solenoid water valve when triggered and again to reset the valve when the timer runs out.
The reset pulse is reversed polarized.