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waltermixxx
Joined: 17 Feb 2010 Posts: 3 Location: Toronto
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Posted: Tue Feb 26, 2013 5:05 am Post subject: My 10 year Project Finally complete |
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I finally finished my Game Show project for my wife. It consists of an Atmel AT90S8515 microcontroller as a brain, with a 4x20 lcd screen, 4x4 matric keypad, 4 large LED player indicators, and 4 remote modules with 10 leds each and a Buzz in buton.
the 8515 was chosen 10 years ago, and as the years progressed the design did not change, I would work on it, get distracted by something else, then work on it again... After the main module was built and tested, I started adding the player modules.
the 8515 port.b is connected to two 74HCT244 chips split into 4 4 bit ports. A particular module is selected with the bottom 4 bits, and that half of the 244 is enabled. The controle lines for the modules is done via the top 8 bits.
Each player module consists of 74HCT190, 74HCT42 for controling the 10 score leds, control module could increment or decriment the LED score leds. (10 in total)...
I'm posting a video on youtube. http://youtu.be/d3G8PRpW1bg
attached are some pics. |
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waltermixxx
Joined: 17 Feb 2010 Posts: 3 Location: Toronto
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Posted: Tue Feb 26, 2013 6:36 am Post subject: here is the schematic of the Player Module Selector/Controll |
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the multiplexing circuit for controlling the modules with only 8 bits
I also added the "Buzz-In" circuit that drives the 4 LED's on the MC controle module that indicates the first player to buzz in,
and also generates an interupt INT1 on pin PortD.3 The circuit shows the lock out portion and release from PortC.1
Last edited by waltermixxx on Fri Mar 01, 2013 2:34 am; edited 2 times in total |
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bzijlstra
Joined: 30 Dec 2004 Posts: 1179 Location: Tilburg - Netherlands
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Posted: Tue Feb 26, 2013 12:06 pm Post subject: looks very nice! |
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That and the Youtube film looks very nice!!
Thanks for sharing.
Have fun
Ben Zijlstra |
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albertsm
Joined: 09 Apr 2004 Posts: 5914 Location: Holland
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Posted: Tue Feb 26, 2013 11:15 pm Post subject: |
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congratulations with finishing your project. Thank you for the video and sharing your project.
It does look like the real thing
The sounds are great too, i guess that was some work.
Very interesting how you solved/designed it. It was fun too watch the video.
yes, today wireless would be a good option but that comes with it own problems and costs. _________________ Mark |
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waltermixxx
Joined: 17 Feb 2010 Posts: 3 Location: Toronto
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Posted: Fri Mar 01, 2013 2:51 am Post subject: Keypad portion of the project |
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using the 74C922 chip
very quick and easy keypad. |
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albertsm
Joined: 09 Apr 2004 Posts: 5914 Location: Holland
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Posted: Sat Mar 02, 2013 10:16 pm Post subject: |
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the 74C922 is/was a wonderful chip but today it seems obsolete and expensive. But it can be easily replaced by an AVR _________________ Mark |
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