Re: Putting Red LED's In Osram Dot it light
- From: maxfoo <maxfoo@xxxxxxxxxx>
- Date: Sat, 23 Feb 2008 08:58:41 -0500
On Wed, 20 Feb 2008 02:29:30 -0800 (PST), "Dave.H" <the1930s@xxxxxxxxxxxxxx>
wrote:
I want to put 16,000 mcd red LEDs in an Osram Dot it light for working
outside when I don't want my night vision affected, the light in
question has 3 white LED's and a resistor (red-yellow-black-gold-
brown) voltage measured from the pins of the LED's is 3.122 VDC. How
would I go about installing these 2.0 volt red LED's? Do I just
change the resistor, if so what value? Unit is powered by 3 AAA
batteries.
just make a smps boost converter and you won't need the resistors, and the
battery will last longer too.
Here's a schematic of a "Joule Thief" circuit ...
Should be plenty of room for that pcb you posted.
VCC
+ -------------|
| | toroid |
-----|---. ,---- |
)|( | |
)|( | |
-------' '---|--|
| |
| |
| |
| |
| | LED LED LED
| --------->|-->|-->|------
| 1K | |
| ___ |/ ===
|---|___|--|2N3904 GND
|>
|
|
|
===
GND
.
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