[SHIPPED] PRS-TECH Micro SD Cart board with Advanced Filtering

[Kearns2020]

Hi Perunnerseth,

Is there any news on when you are going to do another pre-order, really would like a few of these.

[jsawhite]

Hi Perunnerseth,

Is there any news on when you are going to do another pre-order, really would like a few of these.

http://www.sudomod.com/forum/viewtopic.php?f=3&t=1323

[Brenz]

Just recieved mine, looks good! (Aus)

[KrxXxiT]

Yes! just remember to remove the connector from the board first. It wont work with the card edge connector still soldered to the original game boy board

Yeah I know, after half an hour of solder sucking then busting out the dremel got the damn thing off.

I gathered from your posts in the thread where I found the pic, that first lot of pins should be soldered to 2 pins to reduce the impedance or something, but it still works if you soldier them to single pins. Right?

exactly

cartridge pinout.jpg (1.28 MiB) Viewed 8425 times

Hey I'm having some problems. I've wired everything like the picture (pp15/pp19/pp18/pp14/pp16/pp17/pp8) but it doesn't work, the pi's light is flashing like it's booting but no image on the screen, and I know everything else works fine as when I put my sd card directly into the pi it works without any problems. I was wondering, I noticed wormy has 8 wires going from his card reader to the pi and I only count 7 on yours, am I missing something? do I need to run a ground wire? I've tried running a ground wire from the ground (the pin after where you have labeled 3.3V/GPIO PIN1/PP8) and no success, then I also tried grounding the last pin of the cartridge connector, again no success. I feel like I'm missing something.

[prerunnerseth]

Yeah I know, after half an hour of solder sucking then busting out the dremel got the damn thing off.

I gathered from your posts in the thread where I found the pic, that first lot of pins should be soldered to 2 pins to reduce the impedance or something, but it still works if you soldier them to single pins. Right?

exactly

cartridge pinout.jpg

Hey I'm having some problems. I've wired everything like the picture (pp15/pp19/pp18/pp14/pp16/pp17/pp8) but it doesn't work, the pi's light is flashing like it's booting but no image on the screen, and I know everything else works fine as when I put my sd card directly into the pi it works without any problems. I was wondering, I noticed wormy has 8 wires going from his card reader to the pi and I only count 7 on yours, am I missing something? do I need to run a ground wire? I've tried running a ground wire from the ground (the pin after where you have labeled 3.3V/GPIO PIN1/PP8) and no success, then I also tried grounding the last pin of the cartridge connector, again no success. I feel like I'm missing something.

YOu defintely need 8... and that would be the ground pin. Did you remove the connector from the game boy board?

[KrxXxiT]

Yes I spent about 30 minutes de-soldering it from the original game boy pcb, now it's just the black cartridge reader with the pins sticking out the back end.
So when looking at it from the back end (the side where the pins are facing you and you solder onto them), following your diagram from left to right, I've soldered the first 7 (14 when doubled for impedance) pins to the PP points on the pi, now which ground point should I use?

cartridge pinout problems.jpg (419.41 KiB) Viewed 8413 times

[prerunnerseth]

Yes I spent about 30 minutes de-soldering it from the original game boy pcb, now it's just the black cartridge reader with the pins sticking out the back end.
So when looking at it from the back end (the side where the pins are facing you and you solder onto them), following your diagram from left to right, I've soldered the first 7 (14 when doubled for impedance) pins to the PP points on the pi, now which ground point should I use?
cartridge pinout problems.jpg

It shouldnt matter which ground point you use. I would suspect you have a short somewhere. Do you have a meter to check your connections? can you include a picture of your actual project.

[KrxXxiT]

I've re-wired the cartridge reader to use single pins as you suggested a short, I swapped PP8 for 3.3V GPIO.
Still no luck.

Here's some pic's I've put together with labels. If you want a more high def pic, let me know.

my wiring.jpg (403.42 KiB) Viewed 8399 times

Here's a close up of the pi's wiring:

image1.JPG (134.3 KiB) Viewed 8395 times

Forgot to mention; yeah I have a multi meter and I've checked continuity between the cartridge, cartridge reader, and pi, as far as I can tell it's all fine, and I'm using the wires from an Ethernet cable.

[msykos]

Your missing the ground wire to pp5, it does not go to the power strip ground.

[KrxXxiT]

I removed all wires, chopped a 10cm piece of ATA ribbon cable and wired it up the same but using PP5 as msykos said, now works flawlessly

I knew I was missing something simple... 2 things:
1) my wires were probably too long.
2) I did not know PP5 was ground and that the power strip ground would react differently.

Thanks @msykos for the tip

And thanks @prerunnerseth for helping

Now I can move on to finishing up the audio and graceful shutdown


Here's some pic's of my amendment to the wiring:

image1.JPG (150.39 KiB) Viewed 8380 times

image2.JPG (126.7 KiB) Viewed 8380 times