No worries.

It is really simple.. just a load of passthroughs from Pi to screen in the right order, a backlight driver and a few lines in /boot/config.txt

Hex wrote: ↑

Tue Nov 07, 2017 10:43 pm

One of the components, Zener diode 24V 500mW is not in stock, can I use 300 or 200 mW one?

The 300 will likely work ok.

The diode, from what I can make out, is there to protect the FAN if no screen is connected.

In the simplest of terms, the overlay reconfigures the GPIO pins to perform a specific function. In this case it switches them to ALT2 mode. If you pop: dtoverlay=dpi18 into /boot/config.txt, the system will be configured for the necessary GPIO to enable 18bit DPI. There's also a 24 bit overlay that...

Awesome! I'd be in for a couple of those.

I'm looking into using dpi screens on a few projects, is there a good starting point you would recommend for research? Not sure how to get this up and running as I'm unfamiliar with this type of screen. The single best source of info for me was here: http://blog.reasonablycorrect.com/raw-dpi-raspbe...

Another small update; The new PCB's for my new power circuit testing arrived this morning, I soldered one together: https://i.imgur.com/yatt0Rq.jpg?1 So far so good. It switches seamlessly between charger & battery power, presents a constant VBAT, 3v3 for my watchdog and..... When you pull out the p...

Well I fixed them in the my previous post but it's nowhere near being perfect but it's at least less prone to shorts and the 3.3v lines might need a little beefing up too which I haven't done. Using the Gerber files You can get cheap stencils made in China or one of my preferred places right here i...

Hex wrote: ↑

Mon Nov 06, 2017 1:27 am

@mattc could you possibly make a video of the screen working? Is there any recommended place to get the parts?

Try this link for the parts:

https://www.mouser.com/ProjectManager/P ... 7bd4765049

Pretty dirty as I can see it was made with the auto router feature, not complaining but I see some things that the DRC brought up and I also hate the auto router putting vias right next to the pin header solder holes which is so easy to short them to the wrong GPIo because of the via there. Ha-Ha.....

It was a quick & dirty proof of concept.. (the routing is testament to that) to test DPI configs. The schematic is copied from the adafruit tft-friend board, hence 3.3v. It's basic, but it works.

No 24 bit version as I'm using the CM3 for that.. feel free to modify & share.