Alternative MMC/SD connector hacks

Ralf Ackermann sent in this suggestion for soldering an alternate connector straight to an SD card for a cheaper way to use SD/MMC cards in an embedded project. Pictured is his ATMega based MIDI recorder/player that uses this design.

This reminded me of another hack by Rob Wentworth. He noticed that the pin spacing on old floppy disk connectors are roughly the same as SD pins.


With just a couple of shims to hold the card in the correct position, you can use this connector almost without modification–to the connector, or the card.

I must admit, I’m a bit out of the loop on this one. Are SD connectors that expensive or hard to come by? If so, what’s the best way to use them in your projects without using the legit connector?

Cheaper MMC/SD Adapter
SD/MMC card fits in floppy edge-connector