[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/diy/ - Do It Yourself

Search:


View post   

>> No.268698 [View]

>>268625
>>268564

Yeah, I just asked the guy who made them for the lab.

He said he bought some stuff from home depot to make them for $12. I think he called it tempered hardwood, or masonite. He had a few terms.

But yeah, a huge advantage over to a $300 white board. They feel all smooth just like any other white board.

No problem borrowing the thread.

>> No.268498 [View]
File: 227 KB, 1024x685, systems2.jpg [View same] [iqdb] [saucenao] [google]
268498

>>268463

Yeah. I actually barely go to /sci/ now-a-days.

>>268473

Hell yeah its a white board table! I love it. One of the members of this lab space made a handful of them for us. They are about 3 by 9 feet. They are not hard to use.

>> No.268453 [View]
File: 1.11 MB, 749x883, buttonmechanism23.png [View same] [iqdb] [saucenao] [google]
268453

I am waiting on a friend of mine who was going to help me develop a circuit to control the button mechanism.

Someone had a piece of advice, that most of my switch was empty space. So I made a new version that is shorter. I might be able to make it even shorter, which saves me money and wood.

>>268341

Thank you.

>> No.266796 [View]

>>266466

Thanks,

Progress is coming at a slower rate now unlike in the earlier threads where I could make progress every and day report on it.

>> No.265182 [View]
File: 735 KB, 613x548, buttonmechanism21.png [View same] [iqdb] [saucenao] [google]
265182

Made a little button mock up just to take some averages.

I made a colossal amount of stupid mistakes in making this. I think I made three seperate laser cuts because I kept screwing it up. But I guess its best to make these mistakes now as opposed to later.

Thats kind of the curse of rapid prototyping. When prototyping is hard you get everything squared away before you make the prototype. But when its easy and you can just push a button and a computer will do it for you, you are more prone to make design mistakes that the computer isnt smart enough to recognize.

Anyway, the results of my tests were interesting. I was checking to see what the resistance is when the button is fully depressed and not depressed at all. Of the 4 buttons I just made the depressed resistance had a range of 2.5k to 5k, and the not-depressed resistance had a range of 550k to 1,330k.

>> No.264501 [View]

Well its August 1st. My original dead line I set back in May was to be done by now with the whole thing.

Doesnt look like its going to be finished any time soon. Maybe another two months I would guess.

Here is the plan for now. I am going to make about 4 buttons and take an average of their responses. Than from there by engineer buddy Mr. F is going to help me come up with some schematic which can switch off the button below some level of volume.

>> No.263286 [View]

Bump. No progress today.

My friend who was going to help me solve my switch problem could not meet with me today. Nothing to do at the moment.

I met someone who had seen my project online today. They didnt realize how small the module is. Its 10" by 6" by 2" in case any one here also cant see that.

>>262386

Thanks!

>> No.262377 [View]
File: 754 KB, 561x738, module1.png [View same] [iqdb] [saucenao] [google]
262377

Okay I am back in town. Next step: Make some functioning buttons. Then the prototype will be nearly complete, and when it is, then general assembly of the final thing starts.

>>261560

Heh, well..

I personally do read and research. But if I could share my limited advice it would be to get hands on experience as well.

>> No.261476 [View]
File: 850 KB, 944x471, workspace.png [View same] [iqdb] [saucenao] [google]
261476

>>261463

Haha! No!

I remember you. You recommended it and I saved a relevant pdf. I recently opened it open and started the tutorial. It seems awesome. I definitely look forward to using it in the future.

So, I know it can generate waves so I used it to tune my module. Before I was using audacity. I think puredata is better.

>>261422

You sound better off than I was when I started this project. I had tried and failed to make a few effects pedals a few years ago. I guess I started this project with the objective of making a functional stable oscillator and I have succeeded in doing that. I would say a single sine wave oscillator is of comparable rigor to a simple guitar effects pedal.

>> No.261401 [View]
File: 191 KB, 1280x960, gearonground.jpg [View same] [iqdb] [saucenao] [google]
261401

I am part way through tuning these.

This is easier than I thought.

I am using PureData to generate sine waves and then I mix the signal with my module. Then run that into an amp and I turn the knobs on the module until they are the same frequency.

Well I cant actually get it the EXACT same frequency. But my guess is that I am getting them within .01% to .0001% error. Right now it is taking about 20 seconds for the signal from my computer and the signal from my module to oscillate in and out of phase. Which is pretty relaxing to listen to.

Pic related. Its my current set up. I am kind of entertained by the eclectic set of gear I had to set up. It includes:

- Ti 84 graphing calculator
- Laptop
- DC power supply
- Bread board
- Line 6 DL 4 delay modeler
- Ernier ball VP jr volume pedal

>> No.260978 [View]

bumping. No progress lately.

Tomorrow I tune the thing.

>> No.260439 [View]

>>260337

Oh also, thanks for the book recommendation!

>> No.260333 [View]

>>259868

Since starting this project I have learned about this design. Where you tune just the top oscillator and divide it many times.

If I were to start again I would probably do it that way.

>> No.259861 [View]
File: 1.41 MB, 916x727, module5.png [View same] [iqdb] [saucenao] [google]
259861

>>259855

What do you mean by divide down? And, what do you mean by old combo organs?


>>259826

Thanks!

>> No.259818 [View]
File: 23 KB, 640x480, Photo_00003.jpg [View same] [iqdb] [saucenao] [google]
259818

My piano will be broken down into different modules. Each module is about 11 oscillators with buttons on top. The modules will fit together and form a 6 by 18 inch grid of keys.

As of today I have the first functioning module. As in, it has 12 oscillators all of which work. I just need to tune them now and encase it.

Pic related

>> No.259811 [View]
File: 1.30 MB, 1206x651, keylayout2.png [View same] [iqdb] [saucenao] [google]
259811

Oh crap I think my thread died. What happened.

Anyway, this is my third thread. I am making an all analog electronic organ.

This organ is unique in that it:

1. will have 28 tones per octave tuned in just intervals

2. will have keys arranged in a grid not a series like on a typical piano.

>> No.258106 [View]

Bump

Taking a little break.

Should hear back from engineer friend in a few days when he isnt busy.

>> No.256919 [View]

Talked to Mr. F. He seemed confident we could figure out the switch stuff.

>>256889

Uhm,

Well the oscillator is oscillating the whole time. Its just a control on the volume of the output.

Maybe I dont understand you?

>> No.256845 [View]
File: 4 KB, 303x243, 1315730170102.png [View same] [iqdb] [saucenao] [google]
256845

Well that was interesting.

So I checked all the oscillators. 7 out of 11 work. And one doesnt work because it is missing a cap. Two might not work because I just didnt set the pots right.

I tooked up my double optical switch to one that did work.

It behaved in a very peculiar way. I presumed that if there resistance was high it the volume would be low. But it seemed that it works a different way. When the resistance was high the volume decreased. So I could get it in this sweet spot where it would slowly climb or descend in volume.

But, I could never get it to be immediately quiet. It would always have this kind of fade out that would last a fraction of a second. Kind of peculiar.

>> No.256631 [View]

Been fooling around with the oscillators.

About 2/3rds of them work I'd say.

>> No.256242 [View]
File: 73 KB, 640x480, buttonmechanism20.jpg [View same] [iqdb] [saucenao] [google]
256242

Thank you anon. This works well!

Here is a video of an optical switch controlling another optical switch.

http://www.youtube.com/watch?v=BH7MVzteDRU

>> No.256128 [View]
File: 1.55 MB, 645x1062, buttonmechanism19.png [View same] [iqdb] [saucenao] [google]
256128

Prototyped Anon's idea.

Lets see if it works.

>> No.256050 [View]
File: 704 B, 152x69, yes.png [View same] [iqdb] [saucenao] [google]
256050

Good news everybody.

I did a test. At 5vs and 2k ohms the LED is still decently bright. I pointed it at the photo resistor and my multimeter read 2.5k ohms.

All these numbers are within reasonable parameters.

As they say at SpaceX: this is extremely nominal.

>> No.255867 [View]
File: 72 KB, 2960x1958, MB000019.png [View same] [iqdb] [saucenao] [google]
255867

AWESOME.

You guys have great ideas!


>>255780
>>255785

I think I get what you are saying about the aperture thing. And I sort of get your simpler version.

I definitely cant do either, because the open space in the chamber is like, 15 mm by 5.6 mm. Each blade on that hatch would be like a mm wide. The laser itself takes off a third of a milimeter just in the process of cutting.

BUT, thats a really good idea about placing something in front of the shaft. What I could reshape part of my switch mechanism to have a little panel in front of the shaft hole, one which I have cut out a smaller hole in the middle.

That way I can rely on computer controlled accuracy instead of just gluing super tiny pieces of wood into place.


>>255839

GREAT IDEA.

What if instead I just ran the LED through another photo dependent resistor?

Pic related. Although I have since found that a resistor in parrallel is not feasible.

Navigation
View posts[+24][+48][+96]