samboy2005
New Member
hi Guys .
I have to design a circuit that would drive a 3.2 Volt LED @ 700ma from a 4.8Volt NiMh battrey Pack for atleast 5 hours , doing the math i think min. battrey capacity needed would be 4000mAH .
But the problem is driving the LED at a constant current of 700ma as the voltage drops down .
Can anyone help please??
Thanks
I have to design a circuit that would drive a 3.2 Volt LED @ 700ma from a 4.8Volt NiMh battrey Pack for atleast 5 hours , doing the math i think min. battrey capacity needed would be 4000mAH .
But the problem is driving the LED at a constant current of 700ma as the voltage drops down .
Can anyone help please??
Thanks