Author Topic: Philips 12.5W globes  (Read 1503 times)

0 Members and 1 Guest are viewing this topic.

Offline Kartman

  • Contributor
  • Posts: 14
Philips 12.5W globes
« on: August 05, 2014, 03:47:06 am »
Bunnings have Philips 12.5W globe replacement LED bulbs for $16.99. They are rated at 1055lumens and supposedly equivalent to a 75W incandescent. So i decided to try one. I got a cool white one that really wasn't too nice on the eye for general use, so i got some warm white ones - much nicer. So what to do with this cool white one? I must be Dave's long lost twin as very little passes me by without me knowing whats inside! So i opened it. Basically you have to destroy one to do it, so goodbye $16.99 in the name of science. There are 21 leds on a aluminium backed pcb attached to what could be called a tin lid (actually pressed aluminium) pressed into a goblet shaped aluminium pressing that forms the bulk of the bulb. They were serious about heatsinking! Lifting the lid, we have a small single sided pcb with through hole and smt components. All transistors and no ics! It looks like a constant current buck converter that supplies (at a guess)60-70V for the led string. There's a couple of electros that probably determine the actual life of the unit. Overall, the construction of the electronics is first class. I'll post some pix and a schematic when i've completed the drawing.
 

Offline T3sl4co1l

  • Super Contributor
  • ***
  • Posts: 14068
  • Country: us
  • Expert, Analog Electronics, PCB Layout, EMC
    • Seven Transistor Labs
Re: Philips 12.5W globes
« Reply #1 on: August 05, 2014, 04:00:48 am »
Seem to recall there are some Philips ones that are extremely well engineered/made.  Even the ones where the phosphors are huge (and replaceable).

Can't wait for pics.

Tim
Seven Transistor Labs, LLC
Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 

Offline Carrington

  • Super Contributor
  • ***
  • Posts: 1201
  • Country: es
Re: Philips 12.5W globes
« Reply #2 on: August 05, 2014, 07:12:50 pm »
The nex time you can use an dual/quad light adaptor, and combine both, the cool white with the warm white.  ;)
My English can be pretty bad, so suggestions are welcome. ;)
Space Weather.
Lightning & Thunderstorms in Real Time.
 

Offline Kartman

  • Contributor
  • Posts: 14
Re: Philips 12.5W globes
« Reply #3 on: August 06, 2014, 10:19:43 am »
Here's a picture:
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf