Constant Resistance Discharge Curves?????

[saildude]

Has anyone done some constant resistance discharge curves??

I have seen a few at the battery mfg. sites but not much.

Reason for wondering is that it seems that if a LED Light manufacture matched the Led to the battery and skipped any voltage regulation other than a resistor that they could have a very flat discharge / light intensity curve.

I have seen many constant current discharge curves here but did not have any luck finding a constant resistance curve.

thanks - mb

 

[Marduke]

1) I think you're misunderstanding the meanings.
2) There are pleanty of constant resistance discharge curves around here, they just aren't called that.

"constant current" refers to a popular method of creating a regulated flashlight, where the circuit provides a constant current to the LED for a relatively constant brightness. There is also voltage regulation, but it's not quite as common.

Most lights that have no circuitry are simple resistor driven lights, and their curve would be a "constant resistance" curve. These include most lights that use 3xAA's or 3xAAA's. Taking 3 cells is usually a dead giveaway that they don't use a boost circuit, and are most likely cheap resistor driven lights.

Constant current designs usually give a very flat discharge curve, where simple resistor driven lights will have a steadily declining output curve.