BC337 not working - darlington???

[DanPBP]

Hi Guys,

I'm using a pic12f675 to drive 5 groups of LEDs like the schematic bellow:



As a driving transistor I'm using a BC337 but it looks like there's not enough current comming from each output of the PIC to drive the transistors (the LEDs are lit so poorly).

If I connect the base of the transistor (with the 1K resistor) directly to the positive they lit very bright. I also tried with 470 ohms and less.

So, I'm thinking that maybe a darlington transistor could help me with this.

I already have the PCB done (see bellow) and I don't want to do it again, just replace the BC337 with something that might work. Any ideas?




Thanks!

Daniel.