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MikePinball

Pin2DMD for < $125 - DIY

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6 hours ago, Archangl7 said:

is the resistor network needed if you use the waveshare version sd holder? or do you need only the connectors highlighted for virtual pinball?

No the resistors are builtin. Did you look at their website or the link to their schematic? I think that is pretty clear.

Yes only the highlighted connectors. Do you understand enough about what you are going to build to be able to build it? What happens when something doesn't work?

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On 1/7/2019 at 12:42 PM, MikePinball said:

I have fixed a couple of problems on my first PCB and I have made it available in this append for anyone who wants it. As a reminder the "*ONLY* change is the addition of a SMD socket for the micro SD card and a SIL resistor array. If you are not familiar with SMD soldering then I would use the original PCB design. This PCB design has no warranties and you should verify before using it.

Mike Pinball

PIN2DMD_Nucleo144-MikePinball-20190106.zip

Can the SDCARD module like the V3 shield be used?

https://www.ebay.com.au/itm/2PCS-TF-Micro-SD-Card-Mini-SD-Card-Module-Memory-Module-Arduino-ARM-AVR-S/191736124794?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

It is a lot easier to find and much cheaper than the waveshare unit

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4 hours ago, SpaceGambler said:

Can the SDCARD module like the V3 shield be used?

https://www.ebay.com.au/itm/2PCS-TF-Micro-SD-Card-Mini-SD-Card-Module-Memory-Module-Arduino-ARM-AVR-S/191736124794?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

It is a lot easier to find and much cheaper than the waveshare unit

No because it only supports 1bit serial SPI connection while the Waveshare supports 4 bit parallel SDIO connection.

If you want to have it cheaper use the slot directly soldered to the pcb like Mike did above

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here I have just mounted one.  assembly time entirely with the tests 2h30.  It's only 20 minutes longer than with a v3 so everything is fine.
 

 

2A96DD2E-E45F-4916-AE8D-A1330FD3509F.jpeg

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On 7/26/2020 at 2:51 PM, SpaceGambler said:

Can the SDCARD module like the V3 shield be used?

https://www.ebay.com.au/itm/2PCS-TF-Micro-SD-Card-Mini-SD-Card-Module-Memory-Module-Arduino-ARM-AVR-S/191736124794?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

It is a lot easier to find and much cheaper than the waveshare unit

I added a alternative layout which uses a cheaper chinese SDIO capable SD reader. The layout has not been tested by me but should work.

https://github.com/lucky01/PIN2DMD/tree/master/hardware/V4 NUCLEO-144/chinese SD Reader available on ebay

sd_reader.jpg

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