Troubleshooting SD card wiring

[Richb77]

Hi chaps,

I am having a sod of a time with relocating my micro SD card into the cartridge.

I have checked continuity from the SD adapter to the pins on the cartridge slot thingy.

Those wires are colour coded and I have soldered them to the corresponding pads on the Pi zero. Continuity from the SD adapter (which works) to the Pi zero is good and correct (correct colour/corresponding pin goes to the correct pad).

I have even probed the micro SD slot on the Pi to the pads to make sure the data I have there is correct (it is).

I am at a complete loss. Nothing works!

The SD card pre loaded and boots direct from the Pi zero but does nowt when taking it remote. Does it need a pull-up? Or more power?

What's the disadvantage of leaving the SD in the Pi (other than the cool SD in a cartridge factor)

[ICMF]

Need photos of your wiring.

The only practical advantage of a cartridge mounted card is ease of access to the card - you can pull it and mount it in another device for set-up/tweaking, or install a new card easily.

[Richb77]

Tricky picking through the wiring.

But with the cart mounted I have continuity from the wire/Pi solder pads and the pins on the SD card adapter

[YaYa]

The cables must be as short as possible. Then put some shielding on the cable after twisting them together to avoid interferences.

Try this and let us know

[Richb77]

Which? The coloured or the lacquered. Thelacquered where kept long as it's a PITA diagnosing with them short. That being said if that's the issue then that's what I will do.

[YaYa]

Both cables. Try to shorten a bit the lackered ones, and make the colored as short as possible.

[Richb77]

OK. I have shortened the wiring. I have checked layout (Its all matching colours now) and continuity is good from the adapter to the pi zero.

I have shielded the wires with foil and still nothing.

The only thing i can think is a dodgy adapter? But it worked in my laptop...

I am getting prepared to cut my losses on this and move on (I have spent ages on it already).

[YaYa]

Hummmm. Looks good to me, cables are short, you even added the filtering...
did you test the sd card on another pi ?
did you test another sd card ?
is your pi booting when this sd card is inserted into its own port ?

[YaYa]

[Richb77]

I'm going to try another Pi, another SD card next. Thanks for all the help!