I need lighting for an unlit covered parking area. I’m wanting something that uses 18650’s. There’s not much I find available that has a good supply of stored power.
Then I got to thinking, it possible a BLF-Q8 (or any other light) could be modded with a PIR sensor? If so, it could be mounted almost anywhere for portable lighting.
Output interest would be in the 300 - 800 lumen range.
BLF Design Team, or anyone knowledgeable, could this be done?
Hey ARsee,
I think it's probably easier to buy one of the many popular motion detection lights like the OxyLED (or similar) light bars, and modify that to accept external batteries. Some of them (the long ones) get pretty bright.
They come in all shapes and sizes, as well as in cool or warm LED colours.
If you want to modify a light to add a PIR, again that's a pretty easy thing to do. Most PIRs need a little bit of filtering right out of the box so if you want to roll your own, you likely need to add your own micro on board or use a specialized PIR-IC to send a pulse to the micro on-board the BLF Q8 (or whatever light). Then it's all a matter of a simple firmware change to trigger the light based on an interrupt from the PIR, to turn on for a fixed duration :).
Here's one with 66 LEDs (but not sure how bright) and an in-built lithium battery and charger. I think it'll be easier to modify this and add your own 18650s instead.
https://www.amazon.com/dp/B0769FZSCS/ref=psdc_3736741_t4_B071YH4C4N
Again not sure if this is what you're asking for though!
Get one of these
which are adjustable (sensitivity, etc.). You can connect an LED to see how sensitive you want it, by having a test-dummy walk the lot and setting off the device.
Throw together a timer (eg, 7555, 74HC123, etc.) that’ll keep the light on a minute or however long you’d want it after being triggered. Activate a relay with the output.
If a ’501 or ’502 is okay, use the remote tailcap switch, snip off the switching end, use the relay to bridge that on/off. Make it a 1-mode drop-in of the desired CT/tint/output.
The former part can be thrown together into a small box, the light wired remotely.
Or do something similar with a bike-light.
Bam, yer done.