Fwd: [sdiy] Mod wheel/other stuff.

[ethan tripp]

sorry, accidentally sent this to just one person. i always forget that  
you can't just hit reply.

-et-

> interesting ideas. i was thinking of it yesterday for a while. i could  
> certainly rig it. lord knows i do a lot of rigging. but i was actually  
> looking for replacement pitch wheels (thank you). btw, what does the  
> mod wheel do? remember, i'm new to this, i don't own a synth, and have  
> never worked on one. hopefully we'll change all of that.
> so anyway, i did find a site that said it had a replacement for 7 usd.  
> no pix though, and i don't like buying things sight unseen. i was just  
> wondering b/c there is a popular bend you can do on casios (and just  
> about anything else, to get a good pitch up/pitch down. people who  
> i've been talking to about modifying things have been asking about  
> pitch wheels that return to true pitch position automatically. so i  
> thought i'd ask.
>
> other stuff:
> i have noticed in a lot of toy's that i've bent, that certain  
> connections on the board produce non sample based tones. meaning they  
> squeal like a pig if you touch them (naughty) in the right place. if  
> you connect the bend to a pot, you can get a huge range.
> my question is, is it a sort of accidental tone producing circuit that  
> can be reproduced? we talk a lot about oscillators and tubes and  
> whatnot, but this thing is making tones with just resistors and caps  
> etc. can this be replicated? anyone know of any simple sound  
> generating circuits?
> by simple, i mean 12 or so parts, and no chips.
>
> other other stuff:
> i'm looking to build a vco. my first. cost, unfortunately is an issue.
> so, what do you guys think of this?  
> http://www.ele4music.com/vco4d/vco4d.html
> or are there any other inexpensive solutions that you guys have built  
> or can recommend. bear (is that right?) in mind that i've never done  
> this before. i'd really like to start a box o' modules. something i  
> can work on over time, adding modules as i can afford them.
>
> thanks,
> -et-
>
>
> On Wednesday, September 10, 2003, at 05:35 AM, Jaco Sloof wrote:
>
>> How about the playstation Analog Joysticks?
>>
>> Then you've got two of them!
>>
>> actually, it wouldnt be so hard (for you guys ofcourse)
>> to fix up an interface that allows usage of the joystick
>> as a whole (including buttons and all)
>>
>> just rambling...
>>
>> Greets, Jaco Sloof
>>
>> --- Gene Stopp <gene at ixiacom.com> wrote:
>>> Things that can be cannibalized to provide return-to-center  
>>> potentiometers:
>>>
>>> * Cheap radio control transmitters for cars (steering wheel thing)
>>>
>>> * Old pool motor timers (steal the mechanical bits and add a pot)
>>>
>>> * Scrapped OB-X's and DX-7's (but we already knew that one)
>>>
>>> Take a look at the insides of any of the above and you can see how  
>>> they do
>>> it. One thing I like to do is take possession of reel-to-reel tape  
>>> decks
>>> that are hopeless (i.e. heads too worn, bent/broken turntables,  
>>> etc.) and
>>> scavenge them for springs and linkage bits. I've built a few  
>>> spring-loaded
>>> pots this way.
>>>
>>> - Gene
>>>
>>>
>>> -----Original Message-----
>>> From: Tim Parkhurst [mailto:tparkhurst at siliconbandwidth.com]
>>> Sent: Tuesday, September 09, 2003 2:04 PM
>>> To: 'ethan tripp'; SDIY
>>> Subject: RE: [sdiy] Mod wheel
>>>
>>>
>>> Hey Ethan,
>>>
>>> From what I've seen, the potentiometer itself is not spring loaded.  
>>> The
>>> wheel has springs that mount between the body of the wheel and part  
>>> of the
>>> chassis to pull the wheel back to center. I'm assuming you're  
>>> actually
>>> talking about a pitch bend wheel rather than a mod wheel. I have seen
>>> joysticks that have springs built in to return to center, but again,  
>>> those
>>> springs are in the body of the stick rather than in the pot itself.
>>>
>>> Also, the usual trick to get a small center 'dead band' in the pitch  
>>> bend
>>> pot is to put a couple of diodes in series with the pot. The 0.6V  
>>> drop
>>> across the diode means that the voltage coming off the pot doesn't  
>>> change
>>> until it swings higher than 0.6V or lower than -0.6V.
>>>
>>>
>>> Tim Servo
>>>
>>> "Imagination is more important than knowledge." - Albert Einstein
>>>
>>>
>>>
>>>
>>>> -----Original Message-----
>>>> From: ethan tripp [mailto:ethan at monsoonmicro.com]
>>>> Sent: Tuesday, September 09, 2003 12:55 PM
>>>> To: synth-diy at dropmix.xs4all.nl
>>>> Subject: [sdiy] Mod wheel
>>>>
>>>> does anyone know where i could get a mod wheel potentiometer.
>>>> the spring loaded type that rest at center (true pitch) and swing up
>>>> and down?
>>>>
>>>> -et-
>>>
>>>
>>>
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>>
>>
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