UTMonkey
Member
Hi All,
I haven't posted on here for a while but started up again a week or two ago.
After some help from this forum regarding implementing FatFS on a PIC I though I would construct a board which would hold a 3.3V regulator, Level Shifter and SD Card connector all in one.
Here is what I have included:-
1. A top view of the strip board design
2. Bottom view of the strip board.
3. View of the board (without the SD Card)
4. Final board.
Part list
4x 10k Resistors
1x SD Card Connector (2.54 mm pitch)
1x 74HCT125 (or any 74*125 I suppose)
Pins (to the microcontroller)
Top to bottom
1. 5V source
2. 3V source (optional)
3. GND
4. SDO
5. CLK
6. CSEL
7. SDI
Considerations
The regulator doesnt have any smoothing capacitors.
There isn't a pin for Card Detect or Write Protect.
I connected the SD Connector the way it is to save space
The regulator is at a "jaunty" angle because I couldnt slot the SD cards in (lol!)
Hope this helps
Mark
I haven't posted on here for a while but started up again a week or two ago.
After some help from this forum regarding implementing FatFS on a PIC I though I would construct a board which would hold a 3.3V regulator, Level Shifter and SD Card connector all in one.
Here is what I have included:-
1. A top view of the strip board design
2. Bottom view of the strip board.
3. View of the board (without the SD Card)
4. Final board.
Part list
4x 10k Resistors
1x SD Card Connector (2.54 mm pitch)
1x 74HCT125 (or any 74*125 I suppose)
Pins (to the microcontroller)
Top to bottom
1. 5V source
2. 3V source (optional)
3. GND
4. SDO
5. CLK
6. CSEL
7. SDI
Considerations
The regulator doesnt have any smoothing capacitors.
There isn't a pin for Card Detect or Write Protect.
I connected the SD Connector the way it is to save space
The regulator is at a "jaunty" angle because I couldnt slot the SD cards in (lol!)
Hope this helps
Mark
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