Sorry no, they're still on my watch list I do intend to get them at some point though! They do seem like a good idea but I did notice there are some specifications, if you use an AA battery or AAA battery the load needs to be between 50-120mA generally a white led takes 20mA so you need a minimum of x3 leds (you will probably get away with x2) and a maximum of 6, this booster looks like it's designed to power white LEDs as it's output voltage is 3.3 which is exactly right
Booster from AA you need x3-x6 white LEDs
If you want red LEDs it's different as they require 2.2v to run so you have to fit a resistor, so you need to take into account that the resistor will use some current to, the led still requires 20mA, for 3.3v you need a dropper resistor of 56ohm, this resistor will drop the volts but will use some current itself ~20ma, so if you use a red led with resistor it will use 40mA per Led, so. If you use this booster you could power 1 - 3 LEDs, really if you stay in the current limit if the booster you should be able to mix and match red and whites,
The thing that let's this fall down is some LEDs don't use 20mA some use more and some use less! But we can work out what is needed if you post the values!
Finally, flashing amber LEDs, great! But they use 20mA only when they are on, so you will need to have enough whites and reds to keep the minimum of 50ma load on the booster pack before you use the flashers
(This post was last modified: 02-22-2014, 08:32 AM by Tramp.)
Booster from AA you need x3-x6 white LEDs
If you want red LEDs it's different as they require 2.2v to run so you have to fit a resistor, so you need to take into account that the resistor will use some current to, the led still requires 20mA, for 3.3v you need a dropper resistor of 56ohm, this resistor will drop the volts but will use some current itself ~20ma, so if you use a red led with resistor it will use 40mA per Led, so. If you use this booster you could power 1 - 3 LEDs, really if you stay in the current limit if the booster you should be able to mix and match red and whites,
The thing that let's this fall down is some LEDs don't use 20mA some use more and some use less! But we can work out what is needed if you post the values!
Finally, flashing amber LEDs, great! But they use 20mA only when they are on, so you will need to have enough whites and reds to keep the minimum of 50ma load on the booster pack before you use the flashers