DIY Multimedia LED Projector (video manual)

Step 7 PCB Fitting

 
This is very important, as placing the LCD circuit near the LCD without blocking the LCD itself is vital for a good result.

1.- Place the circuit on top of the plastic that is holding the LCD and mark the two holes where the circuit will be fitted.

2.- File the holes a little bit until you can fix the screws you want to use. If you can take out of a old computer the type of screw I'm using (they are called standoffs screws), it would be better as these screws still separate the circuit from the case a little bit.

3.- Drill the case and, after protecting the LCD, use some epoxy to glue the screws.

4.- Fix the cables to something so you wont break it. I used a cable tie.

Comments

[karonth]

Can you check the controller chip numbers for me please? From the video I can just read the manufacturer, Techwell.
I'd like to know if there's a way to add support for vga input to the lcd. What about the 10 pin connector?
Thank you in advance, really a great project!

[newtonn2]

 I there! I could not tell for sure which is the type of controller chip, as I would have to take it all apart to check. But after taking a few snapshot and touch then a little with photoshop I think is the TW8816. Here are some good links about that controller chip.

http://www.synhorn.com/asp_bin/Webeditor/UploadFile/2009831135313959.pdf 
benheck.com Forums • View topic - Amazing??? or no....

http://www.techwellinc.com/products/brochures/TW8816.pdf

If you think is possible to add VGA please, PLEASE, let me know how as I would love to do that.

[aekara]

here is a link of a 3.5" lcd monitor that has vga in


http://www.lcdshow.com/3.5_6.4-10.4_LCD/3_5_vga_lcd/3_5_vga_lcd.htm

[newtonn2]

That LCD looks very good

[aekara]

yes i know but i cant find the price of it.i think its expensive

i was thinking of buying this but i have already buy an 3.5" lcd monitor from ebay

[karonth]

On page 11 of the datasheet it says that the chip supports digital rgb and vga input vith hsync and vsync http://pinouts.ru/Video/VGA15.shtml but since there is no breakout of those pins on the pcb i think it's not a trivial task.
There are also some registers to modify to get the digital interface working (datasheet pg. 45 i think).
I'm by no means an expert, i guess if you ask a question on the benheck forum thread the guys there can give you more info.

[newtonn2]

 OK! never mind, Thank you very much anyway.

[B33T]

 VGA input can be achieved with this:
cgi.ebay.co.uk/ws/eBayISAPI.dll

[Annon201]

Those screws are called standoffs, and they are measured/identified by the diameter and length of the threading of the screw (as well as no. of threads per unit in length)

[newtonn2]

 Thank you for the info!