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3W COB LED PIR Light on banggood.com: https://ban.ggood.vip/5f4p
Banggood Black friday: https://ban.ggood.vip/78vz
Banggood RC Black Friday page:https://ban.ggood.vip/78w0
A new (very bright) 3 Watt version of the Light Angel.
Data sheets:
https://www.vishay.com/docs/70628/70628.pdf
http://www.bookly.com/images/BM71xx.pdf
3W COB LED PIR Light on banggood.com: https://ban.ggood.vip/5f4p
Banggood Black friday: https://ban.ggood.vip/78vz
Banggood RC Black Friday page:https://ban.ggood.vip/78w0
A new (very bright) 3 Watt version of the Light Angel.
Data sheets:
https://www.vishay.com/docs/70628/70628.pdf
http://www.bookly.com/images/BM71xx.pdf
A while back, I discovered that you can drive a white LED directly from an 18650 or any similar lithium-ion cell without "blowing" the LED. I'm not sure if the LED somehow manages to current-limit itself when driven at the maximum of 4.2V (fully charged voltage for a li-ion cell) or if I'm slowly wearing out my LEDs, but I've been driving them directly for some time and they haven't blown yet, nor do they seem to generate a lot of heat. I'm measuring around 75-80mA current drawn by a single LED driven directly from a fully charged 18650 (80mA is worst case).
I'm using just plain, cheap-from-China white LEDs in the 10mm size. Recently I've started using 5mm LEDs and they seem to be happy with 4.2V too.
I also found that it's possible to run 4 white LEDs in series from a 3S 18650 pack without current limiting.
I've been mounting the LEDs directly onto strip-board PCBs to make lighting panels. It's almost incredible how much light you get from 32x 10mm white LEDs driven from two parallel 18650's (through a battery charger and protection board).
Now, seeing this video I'm tempted to try to get some PIR circuits and see if I can make my own PIR light.
Can you use it through a window? Set on a window sill and detects motion outside?
With the higher current draw, it's too bad they didn't switch to C or D cells.
Light devil would have been a better name 😉 This reminds me of when torches migrated to LED, the first ones were very energy efficient and no much brighter than the incandescent bulbs. Many new ones now as bright as car headlights, but are back to puny battery life due to their power consumption.
Humm…. i wonder if one could fit some bit of pwm dimmer magic in there…. Maybe even with some little effects like slowly glowing up when triggered and then ramping down over time to finally shut off…. 😉
Yes, liked this video. Not that I'm the sole arbiter or what's good, but snappy, got stuff done, worth watching. Thank you.
I'm in the States and they sell these (the newer COB version) at major retail stores. However, they are slightly different from the one showed here. The one I have has the waterproof switch on the back as well as a gasket sealing the battery door. The box says it is for use outdoors and that's where I have both of them. One is in my car port and lights the way as I pull in at night. The other is out back and positioned in open air and receives direct rainfall. Both have withstood the elements thus far and I'm still on the first set of batteries (again only been a couple months). These don't seem practical for indoor use.
Given the operating voltage of the 'brain', it just might run dimly on 3 cells and have a long battery life?
Thanks for the video. I really appreciate your work. I have just a little remark : could you avoid saying "that I conveniently printed out a FEW DAYS AGO"? It kind of spoils the "let's discover this device together" experience and adds premeditation. We don't like premeditation 🙂
Make a copy of the bottom of the lamp, or anything else to mount, and use the copy for your template.
I built my own "light angels" with some PIR-Sensor (HC-SR501), some 12V Led-stripes and old liion laptop batteries. The leds draw around 100 mA and this is enough to lighten up our staircase at night. On standby it draws just a few uA. In the cellar i have bigger led lights and combined the setup with a little switch mode power supply so that the leds can draw 2 Amps without running the batteries flat. Also the liion accu will be charged by the smps when the lights are on 🙂
A couple of weeks ago I placed my first order on Banggood; today I received a different, cheaper item than what I paid for.
Guess who will never order anything from them again.
Bangood, free cancer in every order.
I was actually looking at one of these yesterday for a gift thanks for sharing cheers!
short the meter leads together than press the REL button an the meter this will set the relative on the meter to 0 than you can measure lo ohms