Build Log 5 - Nexys2-PSP LCD Board (Part 1)

This video is of me building a board to interface a Digilent Nexys2 FPGA board with a PSP LCD. This first part is the fabrication, soldering, and backlight circuit testing of the board. The next part will be testing the graphics once I get a FPGA design going.

The schematic shown was before I made the changes to the backlight polarity and the current limiting resistor. Also, there are several jumper connections used so some connections may not be apparent. I may post an updated version of the schematic on my blog.

The second part of this video is now available:

http://www.youtube.com/watch?v=MNdZXTuWTcg

Category:

Science & Technology

Tags:

• homebrew
• homemade
• electronics
• PCB
• circuit
• board
• design
• etching
• toner transfer
• kicad
• PSP
• LCD
• backlight
• LED
• Digilent
• Nexys2
• FPGA
• spartan-3e
• CNC
• zentoolworks
• EMC2
• gcam
• Printed Circuit Board
• tin plating
• TINNIT
• MC34063
• tutorial
• Liquid Crystal Display

[Spudmn]

Nice Job. What was the tool you used to do the toner transfer. It looked like a soldering iron with a big flat tip.

[PatheticComputing]

@Spudmn Yeah, that's essentially what it is. It's a Walnut Hollow textile tool.

[peterhall30004]

why did you use toner transfer and not mill the board with your cnc?

[PatheticComputing]

@peterhall30004 It's not something that I normally do. I only did it once on the video I made really just to try it out. Also, I used an Eagle plugin to generate the g-code for the milling, but I used Kicad to make this board.

[rapsod1911]

What's the thinness trace you can make with toner transfer method? Where did you get info about psp lcd?

[PatheticComputing]

@rapsod1911 How thin you can get the traces really depends on several factors: How carefully you do the transfer, etching time, printer resolution, etc. The traces on this PCB are 10 mil. I personally wouldn't go under 8 mil.

Sparkfun sells the PSP LCD and has the datasheet on their website. I bought my LCD from ebay about 3 years ago. The part number is LQ043T3DX02.

[mrmcmlxii]

Nice job, I Love the little CNC machine

[djmips]

Excellent.



[dumyyyyyy]

Nice work! y cant wait to see the lcd sowing something! Now y working at a cnc (something like yours) but the movement from motors is transmitted trough printer belts. In this way eliminate the noise and increase speed. Between motor and the belts y will use a reduction gear, Anyway , great video, and goodluck!

[averagemale2000]

Nice, finally another video. Love your work. Can't wait to see the LCD in action.