I appreciate this pointer. All I would say is please bear in mind I'm just starting out and, so far, I know about PICs, resistors, transistors and LEDs. That's it! I'm now going to see if I can somehow use a Darlington Array... and I'd not mind checking out MOSFETs too... but, right now, it's a grey-area to me. You're right that I only want a switch. So - a MOSFET is
nothing more than a Transistor, is that right? Can I get a multi-packaged MOSFET array too?
Sorry - EDIT - but
if a MOSFET
is just a Transistor - how come it seems that I
could get away without a resistor inbetween the PIC output pin going into the Gate, but with the BC337 transistors I have found that I
definitely need a resistor inbetween the PIC output pin going into the Base?
I know you say it's advisable above...