pir motion sensor with delay

I want a PIR Motion detector with a longer delay. The function would be that of an external floodlight you buy at home depot, but only 12v and only switching a small <2A load.

I can find the PIR detectors but not with time delay. I can find the time delay modules but they are as expensive as the motion detectors.

The cost of both together x qty 4 exceeds what I want to pay as a solution.

I already have IR modules and don't need this as part of my delay dilemma.

SO what I really need is the motion detector specs below with range and delay.

I've considered trying to hack a 120v outdoor unit, but that would be hit or miss.

The closet thing I find to what I want to do is this: (I just don't want to pay $100 for it)

High Performance Human Body Sensor Infrared IR Illuminator

This is one IR illuminator inbuilt human body sensor, and the range can reach up to 30m. With the appliance of advanced infrared heat release technology, this illuminator perfectly achieves the effect of ''light-on with people and light-off without people''. It is generally used for the quiet place such as corridors and lobby areas. Not suitable for crowded places.

• DC12V input, no need for any accessory, no need for internal battery
• Human infrared sensor and light sensor control both
• Specific integrated circuit, stable performance, strong anti-interference ability
• Reliable quality, non-contact switch control

• Numbers of LEDs: 84 pieces
• Viewing Angle:90Deg
• Optimum distance: 30m(90Deg)
• Wavelength: 850nm
• Lumens: 330lm
• Current : 900mA (Input voltage: DC12V)
• Input voltage: AC 24V/110V~220V(Optional, Default DC12V/AC24V)
• Size:(L X W X H):235mm X130 mm X 185mm
• Delay time: 5-88 seconds adjustable (range can be customized) (TIME knob adjustable)
• Sensing distance : 0-12m (12m means the axial distance) (SEN knob adjustable)
• Sensing angle: 120Deg vertical angle, 80Deg horizontal angle
• Control light intensity (adjustable): ¡Ü 10LUX lighting,£¾100LUX lighting out
• (LUX knob adjustable, mark the direction of the sun during the day and the moon in the evening)
• Working Environment: not suitable for crowded environments.

 

 Ideas??

I know just enough to be dangerous. VERY dangerous.

A pity it only responds to human infra-red. (That's a joke...) I have bought various outdoor spots with PIRs - usually around $25 for 2 x 150W or 500W lamps plus adjustable PIR (sensitivity & on-time delay). AC of course! Otherwise just add a delay extender.

Hah yeah, we wouldnt want any EBE IR false alarms now would we?

I have a couple of p.o.s. 120v flood light controls from china, but I can't discern how to hack this in to a 12v system.

I suppose on the 12v PIRs I could add an r\c circuit at the relay with a big cap and delay the relay drop out. It doesnt have to be variable, just more than momentary.

I know just enough to be dangerous. VERY dangerous.

anonymous1 wrote: ... we wouldnt want any EBE IR false alarms now would we?

It's not them I care about. It's them dead 'uns - whether the Buffy types or those cajun eaters. But that's why I use Doppler - no heat required, and less false trips for the few with body heat (and no alerts if anything is leaving). Those EBEs have a rude habit of just appearing anywhere anyhow. (Hence why more people carry bottled water.)

That's funny I saw a vietnam era doppler for sale not too long ago. I could have used that atop my underground silo.

Has anyone here hobbied with a PIR? Since the contacts will be open\closed for a short amount of time, this might be a simple 555 timer I can mod the circuit?

Any other idears how to get a 90 second delay with a 12v motion detector?

I know just enough to be dangerous. VERY dangerous.

I thought many PIRs included Doppler these days...? A simple RC-FET circuit should do, but otherwise maybe some overkill with a 555 (and its load of 10mA)...