Electronics > Projects, Designs, and Technical Stuff

Critique my first PCB

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luiHS:

--- Quote from: carl0s on September 19, 2019, 11:44:53 am ---Are you sending the TE enable DSI cmd? (DSI_SET_TEAR_ON)

I have found that I don't get any screen output without it.. not sure if I mentioned that on here previously.

--- End quote ---


I will check it, I do not remember now.

carl0s:

--- Quote from: luiHS on September 19, 2019, 07:44:43 pm ---
--- Quote from: carl0s on September 19, 2019, 11:38:33 am ---Hey Lui

Great work. I can see the tearing too..
Is that stm32F769 with mjpeg video? I think it looks great.

I have done zero work really. I am still playing with SSD2828 bridge for the 4-lane display. No real reason other than to not give up. but it's just a part time hobby for me and I'm just too tired in the evenings lately to do anything :)

I agree the 320*320 Panasys screen is great and bright.
What about the 480*480 one with the 0.2mm pitch connector? I have a couple of those, but no breakouts for the connector yet and not bothered about having a PCB made just yet.

--- End quote ---

Yes, my PCB boards are with the 769, in addition to an SDRAM, SD card holder and backlight voltage booster.

About the connectors, the 320*320 2.1-inch screen needs a 0.5 mm pitch connector, and the 480*480 2.4-inch screen needs a 0.3 mm pitch connector. Both connectors available in Mouser.

--- End quote ---

Cool.
Yes I have the connectors.

luiHS:
 
I receveid my new PCB for the 2.1 inches round screen. Ready to assemble and test.

Next week I will receive PCB for the 2.4 inches, I hope I can solve the TE problem, its a good round screen, good size and very bright, but the tearing effect spoils something when playing videos with fast movements.

carl0s:
 In your video it is the 2.4" screen already. Ha, I wondered about that.. the connector is going under the piece of paper isn't it?

luiHS:

--- Quote from: carl0s on September 20, 2019, 08:38:11 pm --- In your video it is the 2.4" screen already. Ha, I wondered about that.. the connector is going under the piece of paper isn't it?

--- End quote ---

The first tests were with an HDMI controller board, to check the resolution and brightness of each screen.

Now I go with the PCBs that have all the electronics based on the 769, and connect with 3 wires, 2 wires for 5 volt power supply and a third wire for a serial port to control which videos are played.

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