Calina
Enlightened
I want to use my partially depleted D cells to power a single 5mm white LED. I want to use only one cell at a time. How do I go about it?
I don't have any particular purpose for this light, it is just a fun project. Well, I will probably use it as a camp marker and in tent illumination.
Is there a small cheap driver that could boost the voltage to 3.2-3.5 Volt. If it had multiple modes, like 10, 20 and 40mA it would be great. Or could I use the driver and a switch + a resistor in parallel with the LED to drop the intensity, but that wouldn't be very efficient, would it? Else should I try a joule thief (and forget about multi modes)?
What would be the most efficient solution?
If you have any other suggestion, I'm listening.
Thanks in advance for your help.
I don't have any particular purpose for this light, it is just a fun project. Well, I will probably use it as a camp marker and in tent illumination.
Is there a small cheap driver that could boost the voltage to 3.2-3.5 Volt. If it had multiple modes, like 10, 20 and 40mA it would be great. Or could I use the driver and a switch + a resistor in parallel with the LED to drop the intensity, but that wouldn't be very efficient, would it? Else should I try a joule thief (and forget about multi modes)?
What would be the most efficient solution?
If you have any other suggestion, I'm listening.
Thanks in advance for your help.