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The NGT30 (And what color should it be?)

A project log for Arduino Graphics Card

Advanced graphics for anything from homebrew computers to weather reporting boxes and everything that can communicate over 3.3-5v UART.

Dylan BrophyDylan Brophy 02/13/2018 at 03:485 Comments

I finally decided how I want to make the NGT30.  After some first experiences with reflow soldering SMD, I have learned my limits.

Unfortunately, using FPGAs is unrealistic.  It will take too long to come up with the VHDL, the chips are too expensive, and I will end up breaking half my boards due to soldering issues.

Fortunately, I have the propeller chip in SMD form, which I can solder!

I already have made a prototype board design in KiCad:

I know I can both build and program this.

The new design has numerous improvements over the NGT20.  Now,  RX/TX pins can be selected between a few different Arduino pins, thus increasing compatibility.  There is now a reset button for the arduino too, to make it easier to reach the Arduino reset.  I also added a PS/2 keyboard port, so now I don't have to keep cutting up keyboard cables :P.  The board is also smaller and cheaper as a bonus.

I will be ordering this board *soon*.  I plan to add I2C support to speed up the connection, but I have reason to believe that the MCUs are the bottleneck for the NGT20, so we will see how much that helps.  Alternatively, the arduino would be able to use the hardware serial for the NGT20, parhaps allowing 1 Mbit/s connection to the NGT30.

We will see how this goes in maybe a month XD

Oh yea, what color should the board be?

Discussions

ꝺeshipu wrote 02/13/2018 at 10:49 point

Have you thought about also switching all those passives to SMD for easier and faster soldering?

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Dylan Brophy wrote 02/13/2018 at 14:26 point

I did, but I feel like I have too much trouble with the passives. Now that I think about it, that's stupid because the ICs are the most trouble. I will think about it.

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Ted Yapo wrote 02/13/2018 at 04:05 point

Purple :-)

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Dylan Brophy wrote 02/13/2018 at 04:09 point

We shall see :D

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oshpark wrote 02/14/2018 at 09:19 point

We'll be in touch :)

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