To be honest, i don't quite get what the schematic, and the voltage reference does, could you explain it to me?
i don't quite get what the schematic,
Does the "33R" get the entire current from the led's through it? If so, i'll need a high wattage resistor for that, right?
The resistor is acting as a feed back mechanism for the transistor and thus supplying a constant current in the light of any changes in the load. The value of this constant current is controlled by the size of this resistor. You want more current, you make that resistor smaller so more current has to flow through it in order to develop sufficient voltage to throttle off the transistor.
I use a BC337 and to LED's on basisAre these values as expected ?I was hoping for a constant current independent of voltage to drive my 1W LED's
You probably need a lower value resistor between 'drive' and 'base' or the transistor can't turn fully on.
I use a BC337 and to LED's on basis
Are these values as expected ?