Hi,
I would like to make following 10W or 20W LED strobe project for my cycle rides.
I have ordered following parts.
Above video has explained almost all aspects But i want to use 4 AA Ni-MH battery's with makes 4.8v in series.
Can any one suggest parts needed & how to modify above circuit.
rgds,
Nikhil
What's the Arduino for in your circuit?
Post links to the LEDs you plan to use.
4x AA battery has about 12Wh, so you'll get about 30 minutes worth into your 20W LED.
Maybe more if you actually "strobe"... is that acceptable?
For new NiMH AA batteries, the rated capacity is typically 2.5 Ah, but a sensible person would derate that by half.
NiMH AA internal resistance is typically 320 mOhm, so at 5 A draw, the internal voltage drop would be about 1.6V, giving a pack voltage of nominally 3.2V.
Maybe not enough to light the LEDs, considering other voltage drops in the system.
PaulRB:
What's the Arduino for in your circuit?Post links to the LEDs you plan to use.
Thinking to use a Pro mini .
westfw:
4x AA battery has about 12Wh, so you'll get about 30 minutes worth into your 20W LED.
Maybe more if you actually "strobe"... is that acceptable?
I want to use it as Safety strobe light only.
jremington:
Maybe not enough to light the LEDs, considering other voltage drops in the system.
The only reason to use these battery's is i have bought them by mistake & don't have other use for them & dont want to throw them either..
Thinking to use a Pro mini .
My question was not which Arduino, but why use an Arduino.
don't have other use for them
Use the batteries to light smaller/less powerful LEDs for emergency lighting.
Keep them charged with this ridiculously cheap solar panel.
