P
peter
- Jan 1, 1970
- 0
In all the white-LED flashlights I bought, they all have some sort of
circuit attached to the LEDs. I thought all you needed is a resistor for
each LED to limit the current. What does the circuit do? Is it functionally
similar to a resistor but has higher efficiency (perhaps a switching current
regulator)?
circuit attached to the LEDs. I thought all you needed is a resistor for
each LED to limit the current. What does the circuit do? Is it functionally
similar to a resistor but has higher efficiency (perhaps a switching current
regulator)?