Interfacing 1GB MicroSD Flash Card to a propeller

HollyMinkowski

I have access to several 1GB MicroSD Flash Cards.

I'm thinking it would be cool to just wire them directly up to a propeller permanently.
I mean using no sd card socket, just wire it up. What parts would I need to do this.
I'm hoping it is a simple and straightforward thing to do since it would be fun to have
cheap 1GB flash for the propeller. Maybe I could get the plastic case off the little things
and wire them up right on top of the dil prop chip and cover it over with a blob of epoxy

If I could do it I'd basically have a 1GB flash version of the propeller for a little soldering
and a nearly free sd card.

Cluso99

You can buy an SD to microSD converter cheaply (about $5). Just hardwire the SD and you can then swap the microSD.

Interfacing is easy. See OBC's cookbook or alternately look at my TriBladeProp schematic. Code is in OBEX for Femto.

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Links to other interesting threads:

· Home of the MultiBladeProps: TriBladeProp, SixBladeProp, website (Multiple propeller pcbs)
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: Micros eg Altair, and Terminals eg VT100 (Index)
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My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm

heater

Every microSD card I have bought has come with a little adapter that enables plugging the microSD into an SD card reader. I just soldered to the gold pads on the adapter. The result is having a removable microSD card on the Prop.

Glad I did not go for soldering directly to the microSD as downloading large files through a serial link is pretty slow.

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For me, the past is not over yet.

HollyMinkowski

@Cluso99

That's a better idea!

These SD cards also have the adapter inside the package.
It will be better to be able to swap the micro SD in and out of the little adapter
Also easier to solder to the larger SD adapter.
I can just epoxy the SD adapter to the edge of the circuit board to make it easy to swap
the tiny microSD.

Rayman

Here's my solder job with the adapter from a while ago (can't find the post...):

You have to be careful soldering the adapter because it melts easily...



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My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm

HollyMinkowski

@Rayman

Nice soldering

We have this electrically conductive glue that I'm going to try on the SD card contacts.

This guy makes his own conductive glue...a good idea as it is costly!
http://www.instructables.com/id/Make-Conductive-Glue-and-Glue-a-Circuit/

Mike Huselton

Holly,

Thanks for the tip about the conductive glue. Speaking of glue, I am glad to see you stick around the forum.

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JMH

Oldbitcollector (Jeff)

Conductive glue... Neat idea..

Here's a commercial alternative. Has anyone used this stuff?
www.allelectronics.com/make-a-store/item/WG-1/CONDUCTIVE-GLUE-0.3-FL.OZ./-/1.html

OBC

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New to the Propeller?

Visit the: The Propeller Pages @ Warranty Void.

heater

Conductive glue - interesting, make connections whilst at the same time including series protection resistance. A kind of DIY surface mount resistor!

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For me, the past is not over yet.

HollyMinkowski

@James Michael Huselton
"I am glad to see you stick around the forum."

Thanks

I will become a fixture as soon as my Propeller gear all gets delivered.
I will need lots of help.