[sdiy] Improving LED response when driven from half-wave rectifier

[Paul Perry]

I suppose it woulsd be possible to make those volrage to current conveters 
non linear, by replacign one of the resistors by a diode, or a 
diode/resistor combination.
And, for the present application, I think you would want a log conversion, 
not exponential - so that you could see more of the low voltage action.

paul perry Melbourne Australia