1

(2 replies, posted in Releases)

This is good stuff!! Love the cover art! (and the music too!) (and the cover art!)

2

(5 replies, posted in Motion Graphics)

RJL: Good idea! Maybe in a future update!

Imaginary: =DD

3

(5 replies, posted in Motion Graphics)

Made a fireplace in game maker. Thought you might like it for your holiday activities.

http://salkinitzor.itch.io/fireplace

4

(0 replies, posted in Releases)

Made a sort of a game.. You can move a car around on a stick and go crazy/have fun with the road and the background!

http://salkinitzor.itch.io/car-on-a-stick

Enjoy!

One of the best things ever created! Great work Sarofer! Please film more of your everyday life and make a sequel!

The amp works great!
Somehow this version has more power than the breadboarded version even though I am using the same battery.
At highest volume it´s really way to loud and turns your headphones in to speakers. smile
Should maybe tweak the max volume. Or is it a good thing to maybe be able to drive a pair of small speakers?

Hera are some pix and a song!
https://www.dropbox.com/s/tv6mgf4ok33v1 … 1.png?dl=0
https://www.dropbox.com/s/dq5044vu6icis … 2.png?dl=0
https://www.dropbox.com/s/45h0g605z5ztz … 3.png?dl=0

https://www.dropbox.com/s/czszgmsnugdbd … b.mp3?dl=0

I have been running it for a few hours and the TI83+ seems to be fine.
Tried adding diodes on the input but it didnt work at all. It just went silent.
Thinking about binding it to ground instead and have the output be high when its supposed to be silent.
its better than a hot input.

Next step: Finding a box and deciding what kinda input jack to use!

The PCB:s for the headphone amp have landed!
https://www.dropbox.com/s/hmyfvq8lu9kkj … b.jpg?dl=0

Now I´ll have to build one. I hope it works! smile

8

(0 replies, posted in Releases)

Important music!

https://moogplayschristmas.bandcamp.com … -christmas

irrlichtproject wrote:

Well, if plugging this in while on the home screen (ie not running HT2 or the shell) doesn't cause a massive slowdown of the calc, then I suppose you're good wink On the other hand, I guess you could simply add a couple of diodes, just to be on the safe side.

Good point, not sure if I ever had it connected when not in HT2.
Will investigate.
And I´ll try it with a couple of diodes on my spagetti nest and see what happens.
To bad I ordered the pcb:s yesterday but one can always put the diodes off board for this batch.
I ordered 10, they had a special deal.
Now I just have to wait 4-100000 weeks for the things to ship from china.

irrlichtproject wrote:

@snorkelitzor: Aww yes! Sounds good to my ears as well. Yeah, the inversion is unlikely to matter, in fact HT2's output is reverted from TI's standard, so you're basically putting it back to "normal" wink Btw a side benefit of this would be that you can have your headphones plugged in at all times (even during normal TI-OS operation), provided no voltage is flowing back from the amp to the TI.

Hah! Nice! Inverting back to normal. smile
I´m glad you like how it sounds!
About voltage flowing back. I had to hold the invertors high if it was nothing playing  into the amp, that way the output is always zero when its silence. So there is a weak voltage flowing back. but it did not seem to matter to the calculator. I´v had it hooked up for hours.
Should I rethink?

Hey Calculator friends!

Since my TI83+ could not drive my headphones properly I decided to design and build a small headphone amp for it. I find it bulky to bring a small mixer or something if I want to make some music on the bus or train.

I got an idea to build the amp from a CMOS 4069 chip, a hex inverter. These chips are pretty fast and since anything that comes out of the calculators two channels is 1 or 0 it felt fun to give it a try and it worked great!
I even threw in a simple low pass filter to take out all the extreme high frequencies that we cant hear anyway.
(Feeding a "normal" non-pwm sound source in to this thing would probably result in a fancy 1bit distortion. Have not tried it yet but it should be brutal. smile)

Here are some sound examples:
https://www.dropbox.com/s/55jkqx7bfqwhb … 1.ogg?dl=0
https://www.dropbox.com/s/mes9rjzckuqas … 1.ogg?dl=0

First one is through the amp and the other is clean.
Looking at the waveforms in cubase I would say they are pretty much identical. Except that the amplified one is inverted. But I can live with that. smile

I have the thing breadboarded right now but I have designed a pcb and will order a few test cards soon.

If you guys are interested I can make some pcb:s for you too if the first batch turns out ok.
I figured that we all have this same problem. smile

Picture of spagetti amp:
https://www.dropbox.com/s/6z8atckrhugfr … i.jpg?dl=0

Super duper plans!!!