I have built a kit with PIC8F4550 on breadboard. I have couple of LEDS, LCD working. Now I have to attach a SD or MMC reader. I have seen the schematics but it seems too complicated. For example how about converting 5 volts to 3.3 volts (use a LED or resistance??) I need help with hardware design also which MMC card reader to buy (from sparksfun??). I am hardware newbie, software I can manage. Any help/suggestion/simple schematics/tools/parts listing would be appreciated. Thanks