DC Entries: Relay board, PONG

posted Jan 4th 2007 11:31am by Will O'Brien
filed under: contests, misc hacks

I’ve got a couple more design challenge entries for ya. (The first one made the entry deadline, but he had to repost it to another web host – no whining about how it was posted on the 26th)

[Joe]submitted his Parallel port relay board. He’s still working on the software to drive it, but the board looks good. He suggests cutting a parallel cable to make the input. (I’ve done it, it’s a pain) I’ll suggest soldering the inputs directly to a solder style DB25 – or add some edge traces so that a cheap solder style connector can be attached directly to the board.

[Andrew] built and submitted UPONG – Pong on a LED dot matrix display. It reminds me of the pong hat. He’s even put up a video of the game in action.

Read

Comments [52]

Reader Comments

I like the pong game a lot. (First Post)

Posted at 11:49 am on Jan 4th, 2007 by propeine

How many enteries were there?

Posted at 11:51 am on Jan 4th, 2007 by Jason

Where’s the hack-a-day logo on the parallel port relay board?

Posted at 12:16 pm on Jan 4th, 2007 by akmixdown

Does the pong board have the hack a day logo on it? Even if it doesn’t I really like it.

Posted at 12:19 pm on Jan 4th, 2007 by yuckymucky

@3: The documentation on the site says that the hackaday logo scrolls across the LED matrix on startup.

I have to agree. That upong is beautiful… I’d hate to have to do that soldering though…

Posted at 12:41 pm on Jan 4th, 2007 by Naer Dinsul

I recently worked on a project with LED matrix displays. In the process of trying to reduce our cost and our pin count we happened upon the A6821 and the MIC5891. These are gangs of source and sink drivers that are controlled serially via shift registers. Further they can be daisy chained so that you can control as many matrices as you want with only three MCU lines as long as you can squirt the serial data out fast enough.

Posted at 12:42 pm on Jan 4th, 2007 by royce

@#6 refer to #4 for your answer.

Posted at 1:22 pm on Jan 4th, 2007 by kcbanner

Ohh i like the pong game. could be cool with a building guide for it and the chip firmware released, so it’s like an open source sff pong game. only thing missing is a “cpu player” (ie. if your alone then you can play agains the chip itself), an onoff swicth and a battery pack (maybe li ion)

Posted at 1:43 pm on Jan 4th, 2007 by Crossed

no, the scrolling logo is for the upong game. I’m talking about the relay board contest submission.

Posted at 3:19 pm on Jan 4th, 2007 by akmixdown

The pong game looks neat – nice job, andrew!

Then again, I’ve got a soft spot for pong — click on my name or watch the video: http://youtube.com/watch?v=EdPAzvWQBCI
I didn’t submit my design to hackaday because the board is really small & the parts are hard to solder. That, and I didn’t finish until Jan 1st :-)

Posted at 4:31 pm on Jan 4th, 2007 by morcheeba

pong game is neat. looks like it would be tough to put together though if that is the idea.

Posted at 4:41 pm on Jan 4th, 2007 by john

i LOVE the upong board!

How are you deciding the winner? public vote?

–neg

Posted at 5:45 pm on Jan 4th, 2007 by neg

if you look close you can see the logo on the back of the board directly left of the buzzer.

Posted at 5:51 pm on Jan 4th, 2007 by Dok

if you go to the site, the hackaday logo can be found on the bitmap version of the parallel pcb. im still new with eagle, so i had to add it into the bmp version with photoshop.

and btw, the software is done, it lets you turn on or off devices connected to your computer via the internet. the page was posted on the 25th, but i edited it to show the new software on the 26th. scroll down, the app and the php script to run the connect method are near the bottom.

-joe.

Posted at 5:54 pm on Jan 4th, 2007 by joe

don’t tell me that the upong project was made in 25 days! I won’t believe you!

Posted at 9:42 pm on Jan 4th, 2007 by Jerome

@morcheeba,

wow.
that pong watch looks A+.

like the stuff on tokyoflash.com

Posted at 10:30 pm on Jan 4th, 2007 by joelanders

I really like the parallel port relay – not too new, but really nice on a small card. I agree with Will that there should be a more comfortable way to connect it, like edge traces…

The Pong board is also nice, it brings back memories…

Posted at 4:48 am on Jan 5th, 2007 by Kai

Nice little Relay board.
Although Edge connectors would be nice.
and I am also a big fan of opto isolators
when interfacing to Parallel ports on pcÂ´s

/Kyndal

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