Hi Ski,

Yes, I built a temp/humidity regulator, using the PIC16F877A, an LM35 temp sensor, and a non linear resistive humidity sensor, with 2X16 LCD, and a user menu to set the paramaters. Once the temp or humidity goes outside these paramaters, a relay is triggered (Through a ULN2003A) which will switch on either a humidifier, dehumidifier, heater, cooler. But the analogue stuff isn't very accurate which is why I'm searching like a maniac for help with this digital stuff.

Apart from that, various LED strobe kits for volunteer firefighters, again using the darlington pair chip, which can give you current output of 500mA per leg, or more if you run them in parallel.

But I'm still a newbie