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Messages - Keoni29

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1981
Anime and Manga / Re: My manga drawings
« on: May 16, 2012, 12:34:28 pm »
@AzNg0d1030 Wow, very nice! Are you still doing artwork?
@Keoni29:Not bad either. I can see you are improving. ^^
Thank you. It's been a while since I drew something. The exams are taking up a lot of time.

1982
TI Z80 / Re: [Ti-Concours]Jetpack 8x+
« on: May 16, 2012, 12:30:28 pm »
Sweet! I love the new animation!

1983
TI-Nspire / Re: Roller Coaster Tycoon 2 on TI-Nspire
« on: May 15, 2012, 10:22:27 am »
Coasters and such are gonna be a pain to animate though...

1984
So... Everyone should buy calculators instead of obligations?

1985
Anime and Manga / Re: My manga drawings
« on: May 14, 2012, 04:10:23 pm »

1986
News / Re: 3rd-party USB Nspire programs on the horizon?
« on: May 13, 2012, 03:36:45 am »
Next up: TI84+ usb support :)

1987
News / Re: 3rd-party USB Nspire programs on the horizon?
« on: May 12, 2012, 04:13:52 pm »
How bout minecraft?

1988
I designed this digital to analog converter for use with calculators which lack of sufficient I/O. This is a 4 bit DAC which means that there are 16 possible voltage levels.

What do you think? :hyper:

Documentation:
Operating voltage: 3,3V-5V
Data has to be sent in like this:
xxxx01
Send data: Least significant first
The 01 at the beginning has to be sent in before the 4 bit word. This is due to the architecture of the "timing" circuit.
Example: Send 5:
0101 01

For use with calculators:
AXE code sample which outputs a sawtooth wave:
Spoiler For Spoiler:
Code: [Select]
.TEST
0->V
Repeat Getkey(15)
DAC(V
If V++ =16
0->V
End
End
0->port
Return
Lbl DAC
2->Port //Sends the first two bits indicating the end of a word
3->Port
1->Port
3->Port
For (4)  //Sends the 4 bit word to the DAC
If r1^2  //Part of the dec->bin conversion
2->Port
Else
1->Port
End
3->Port
r1/2->r1 //Part of the dec->bin conversion
End

I HAVEN'T BUILT ANYTHING YET, SO I DON'T KNOW WHERETHER IT WORKS OR NOT. THIS IS POTENTIALLY HARMFULL FOR YOUR CALCULATOR, SO STAY AWAY FROM IT UNTILL THE OPPOSITE HAS BEEN PROVEN.


Built da thing. Here 's how to make your own:
 http://www.omnimaga.org/index.php?action=dlattach;topic=13542.0;attach=13198

1989
I think I'm gonna focus on the next version. It will feature a nicer layout. Something like this:
SQ1 F1 SQ2 F2 {}
--- -- --- -- ||
A-4 51 --- -- []
=== == === == ||
--- 00 --- -- ||
G#3 A3 --- -- ||
--- -- --- -- ||
--- -- --- -- {}

Yes there will hopefully be two channels.

1990
I write to the port using the ->port command. By turning on and off the port rapidly I can emulate a digital to analog converter.

Edit: Btw in the video it was just altering the duty cycle.
The square at 50% duty cycle sounds loud and at 10% the volume of the note is much lower. Real pwm using digital to analog conversion can be heard by the human ear, so I would have to add a capacitor and a resistor to filter the signal which is not a problem for me, but not everyone wants to make custom hardware for it to work. For those who do want to make this little circuit I will add support for custom waveforms and such, but otherwise you will be stuck to squarewaves.

1991
This is a demo of the new sound engine. It's an early demo so don't expect it to be spectacular. It will support pitchbends, vibrato, sweeps and portamento etc.


1992
Music Showcase / Re: [Pyro] Pyro
« on: May 08, 2012, 05:59:34 pm »
Reminds me of the pc games I grew up with.

1993
Contra / Re: Contra
« on: May 08, 2012, 01:11:21 pm »
Too bad the TI84+ has a crappy screen. I wonder if I could replace it :/

1995
Computer Usage and Setup Help / Re: Is this a good gaming computer?
« on: May 05, 2012, 03:03:16 pm »
How bout quake and minecraft?

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