MMC interface to PIC18f4550

Discussion in 'The Projects Forum' started by newbieEm, Nov 1, 2011.

  1. newbieEm

    newbieEm Thread Starter New Member

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    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
  2. THE_RB

    THE_RB AAC Fanatic!

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  3. upand_at_them

    upand_at_them Member

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    A simple voltage divider works fine. I've done it for SD/MMC card interfaces.
  4. THE_RB

    THE_RB AAC Fanatic!

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    Yeah, it can be made to work if you know how to do it and what to watch out for.

    But the OP said he was looking at "buying a MMC card reader from sparkfun" so the one I linked to is not much different in price but has onboard 3.3v regulator and level converter ICs. And PIC source code examples etc supplied free of charge.
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