Author Topic: PCD Board light  (Read 734 times)

0 Members and 1 Guest are viewing this topic.

Offline kaugustinoTopic starter

  • Newbie
  • Posts: 6
  • Country: ca
PCD Board light
« on: October 20, 2019, 04:25:31 am »
I want to build a PCB board flashlight. Using a bunch LEDs. Something like one of the Led 3 or 4 led type push lights. With capacity to be either ran on batteries or usb. I need some advice to get started. i would just get built from one of the online PCB sites. I have limited electrical experience. Mostly basic circuits stuff
 
On batteries i would like to use a lot of batteries (3-4 AA batteries). Basically something i could use for a while without changing them. Something bright enough i could use as a nightlight. With a rocker style on/off switch. Or something big/easy to use. I have a basic design idea. at this point board size/shape does not matter. I'm not considering to sell them. Just something custom for myself. Any designs i will let anyone use.
 

Offline kaugustinoTopic starter

  • Newbie
  • Posts: 6
  • Country: ca
Re: PCD Board light
« Reply #1 on: November 03, 2019, 05:27:06 am »
So i want to build something like a LED Puck light. Those 3 led lights that you just push on the top to light it up. But i want to change that out to a rocker style on/off switch (Ease of use) But instead of using just 2-3 AA batteries i would like to add maybe double the batteries (or run it off an pocket usb charger) and more leds
Is their a basic design i can use as a template to start?
 

Offline kaugustinoTopic starter

  • Newbie
  • Posts: 6
  • Country: ca
Re: PCD Board light
« Reply #2 on: November 03, 2019, 05:39:53 am »
My crappy drawing attempt
LEDs could also be circular. Does not matter.
 

Offline bob91343

  • Super Contributor
  • ***
  • Posts: 2675
  • Country: us
Re: PCD Board light
« Reply #3 on: November 03, 2019, 06:06:30 am »
There are two basic approaches.  The first, and simplest, uses resistors or constant current devices to limit LED current.  Not too efficient but widely used.

The second uses a complex switching circuit that accomplishes the same thing but wastes much less energy.  This translates into longer battery life.

The best scheme treats each LED separately.  You can also put them in series but making the current constant is a bit more of a challenge due to the limited overhead voltage from AA cells.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf