Help with motion sensors!

[fotokid]

I'm attempting to build an electronic piece that I want activated by a motion sensor. I also want the sensor to only work at close range (1-5ft). Everything I'm finding online is extremely long range (30-150ft). Any suggestions on where to find one?

 

[fotokid]

I found this cheap radio shack sensor but the range is still a bit too far (7m)

Pyroelectric Infrared PIR Motion Sensor Detector Module

Would it make sense to add something along the lines of a 10-turn pot to limit the power and lower the range?

 

[NkySpike65]

Try something like placing one or two pieces of dark patty hose over the sensor, something that is sheer to help dampen the sensor but, still allow it to work.. You might even try a thin piece of cloth.

To have it focus on a small area take a piece of paper or card board and poke a pin hole thought it and fix the paper over the sensor. You might have to make the hole bigger if the sensor doesn't see anything.

 

[hyperdyne]

Drill a small hole and put the PIR behind it. Plus remove the fresnel lens off the PIR, it will reduce its usable distance quite a bit.

 

[fotokid]

Thank you both for the advice, I'll go ahead and pick up the sensor and start trying these methods out.

hyperdyne- I assume you're associated with hyperdyne labs? If so you guys make great stuff!! Keep it up!

 

[fotokid]

bump for more ideas!

 

[tictoc]

Cowlacious put this idea http://www.cowlacious.com/SupportDocs/Motion Detector How-To.pdf up on the Monster Page of Halloween Projects Monster Page of Halloween Project Links

Maybe you will find some ideas or some more inspiration there....

Let us see your work up when you choose. Good luck

 

[hyperdyne]

Thank you both for the advice, I'll go ahead and pick up the sensor and start trying these methods out.

hyperdyne- I assume you're associated with hyperdyne labs? If so you guys make great stuff!! Keep it up!

Yes that is me! Thanks, glad you like it. Good luck with your project. I've had great luck taking off the lens and limiting the beam of the small PIR window on the sensor.