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 Forum index » DIY Hardware and Software » Circuit Bending
bending Yamaha PSR-6
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dnny



Joined: Mar 12, 2005
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PostPosted: Wed Aug 30, 2006 11:20 am    Post subject: Reply with quote  Mark this post and the followings unread

Pehr wrote:
dnny: What NPN transistor did you use for the LED-thingy?


the transistors where the type i had so they where C2389
Posted Image, might have been reduced in size. Click Image to view fullscreen.

they where available and thats the only reason i used them -I´m sure other NPN´s will do the same job.

:sorry for the late reply


pehr. are you really a Meteorologist?

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Pehr



Joined: Aug 14, 2005
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PostPosted: Wed Aug 30, 2006 1:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

dnny wrote:

pehr. are you really a Meteorologist?


Yep, Cool Finished my degree this summer and now I'm starting at my first job (at SMHI) as a meteorologist on monday 4th Very Happy

Btw, do you think 2N3904 will work?

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dnny



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PostPosted: Thu Aug 31, 2006 12:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

Pehr wrote:

Yep, Cool Finished my degree this summer and now I'm starting at my first job SMHI...

Btw, do you think 2N3904 will work?


i think 2N3904 should be just fine -

Congrats on the degree. Do meteorologist have all kinds of great looking measurement gear or is it all on laptops ? you could maybe slip your SL between some radars and snap a pic Wink

"Swedish Meteorological and Hydrological Institute" that sounds so cool. hope you enjoy your new job.

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Pehr



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PostPosted: Thu Aug 31, 2006 1:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

dnny wrote:
Congrats on the degree. Do meteorologist have all kinds of great looking measurement gear or is it all on laptops ? you could maybe slip your SL between some radars and snap a pic Wink

"Swedish Meteorological and Hydrological Institute" that sounds so cool. hope you enjoy your new job.


Thanks!

Yes there are lots of cool looking measurement gear, mostly used by the meteorologist researchers from the universitys on their long research expeditions to the arctic. Rolling Eyes My job will be sitting by the computer handling data Cool

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Pehr



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PostPosted: Tue Sep 05, 2006 10:04 am    Post subject: Reply with quote  Mark this post and the followings unread

Does the PSR-12 use FM? Confused
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dnny



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PostPosted: Wed Sep 06, 2006 12:00 am    Post subject: Reply with quote  Mark this post and the followings unread

Pehr wrote:
Does the PSR-12 use FM? Confused


after reading the manual , i think it´s not FM. because they do not mention it. - but who knows?

do you have one? - open it up Smile

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Pehr



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PostPosted: Wed Sep 06, 2006 7:03 am    Post subject: Reply with quote  Mark this post and the followings unread

dnny wrote:
Pehr wrote:
Does the PSR-12 use FM? Confused


after reading the manual , i think it´s not FM. because they do not mention it. - but who knows?

do you have one? - open it up Smile


Nope, just browsing through auctions... where did you find the manual?

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dnny



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PostPosted: Thu Sep 07, 2006 3:15 am    Post subject: Reply with quote  Mark this post and the followings unread

Pehr wrote:
Nope, just browsing through auctions... where did you find the manual?


Forum index » How-tos » Manuals, Instructions, and Documents
it´s the first sticky post :
The Yamaha Manual Library

arrow http://www.yamaha.co.jp/manual/english/forums.html

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Pehr



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PostPosted: Thu Sep 07, 2006 6:22 am    Post subject: Reply with quote  Mark this post and the followings unread

dnny wrote:
Pehr wrote:
Nope, just browsing through auctions... where did you find the manual?


Forum index » How-tos » Manuals, Instructions, and Documents
it´s the first sticky post :
The Yamaha Manual Library

arrow http://www.yamaha.co.jp/manual/english/forums.html


Great link! Does anyone know of a list where all the Yamaha keyboards with FM are listed?

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kb



Joined: Sep 23, 2006
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PostPosted: Sat Sep 23, 2006 8:44 pm    Post subject: possible yamaha home FM keyboards Reply with quote  Mark this post and the followings unread

New member, first post.

Months ago I was trying to keep track of which home Yamahas were FM. This is the partial list I came up with (tracks only full-size key models):

Definite Yamaha FM Keyboards
PSR 6
PSR 21
PSR 22
PSR 36
PSR 41


Possible Yamaha FM Keyboards
PSR 11
PSR 12
PSR 19
PSR 28
PSR 32

Probably not
PSR 2
PSR 3
PSR 15
PSR 18

These are based somewhat on personal experience, but mostly on manuals. Can't vouch for perfect accuracy.

Weird: I have the PSR-36 and it doesn't have your garden variety DIP FM chip - it seems the stuff doing FM is either a 64 or 80-pin SMT mounted on the bottom of the main PCB. Definitely not an easy hack (I'm scared to) and maybe it does the FM in DSP?


I have done the 'cut data traces between CPU and FM chip' on an old PSS170. Worked very nice. The wrinkle I added was to minimize the number of switches or modular pins you had to use; basically a one-button press through a scrambler to goof up the voice.

http://home.earthlink.net/~kerrybradley/id3.html
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Pehr



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PostPosted: Sat Sep 23, 2006 11:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

great list! Very Happy thx

I know threse are FM based too:

PSS-16
PSS-140
PSS-270
PSS-390
PSS-480
PSS-780
SHS-10

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Last edited by Pehr on Wed Sep 27, 2006 12:48 am; edited 1 time in total
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Pehr



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PostPosted: Sat Sep 23, 2006 11:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

and of course the DX7 Rolling Eyes
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AbraC



Joined: Aug 04, 2006
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PostPosted: Tue Sep 26, 2006 9:02 am    Post subject: Reply with quote  Mark this post and the followings unread

pss 790 is pcm. thats the only one i know.
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yunus510



Joined: Jan 03, 2006
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PostPosted: Tue May 22, 2007 10:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

does anyone can help me for pin assignment from the cpu.
my matrix key was broken. i plan to replace it with matrix key from other keyboard..

thx b4
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12pointfont



Joined: May 30, 2007
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PostPosted: Wed May 30, 2007 3:39 pm    Post subject:  great thread! Reply with quote  Mark this post and the followings unread

just bought a Pss-140 and a Psr-6 off eBay fer 20 bucks with a/c adapters what a deal!

anyway i just bent the psr-6 and it worked okay but was extremely glitchy and i think i killed it...haha...after opening it up i realized there was some contact between two of the pins...and it might be dead. i'm going to move on the pss-140 though...personally i liked it more than the psr-6...anyway!

ill put up some pictures when i'm done, and does anyone know of any actual bends other than this such as pitch or gain bends? i've read of it being possible on some yamaha's with the JRC amplifiers but the only 8-pin IC on the psr-6 is an op-amp. i tried to improvise by looking through datasheets and when i went and soldered up the potentiometer and switch and turned it on it just make fuzzy noise...(also may be why its dead now) i dunno...any ideas? kinda new to electronics...but getting smarter and leaving destoryed toys in my path.
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ickystay



Joined: Nov 15, 2006
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PostPosted: Wed May 30, 2007 3:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

Add the PSS-170 to the list. I just got one from the goodwill and was happy to see a YM2413 inside!

Thanks for all the cool info in this thread!
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12pointfont



Joined: May 30, 2007
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PostPosted: Thu May 31, 2007 8:14 am    Post subject: the portasound Reply with quote  Mark this post and the followings unread

did your pss have auto accompanyment or wehatever too?

i hear it works well with this bend. Cool
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LukeDI



Joined: Sep 23, 2006
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Location: Boston MA, USA

PostPosted: Wed Jun 20, 2007 7:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

I've been looking for a first bending project and I just happen to have a PSR-6 sitting around now I know its fate.

Two questions though; first I know not to have the thing plugged into the mains while bending it but the bend doesn't mess with the power requirements does it, i.e. can I still plug in the bent board? And second with all the switches on and no patches made will the thing sound like it isn't bent? (Not that I'm worried about preserving the 'fine' sound of the original I'm just curious)
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12pointfont



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PostPosted: Thu Jun 21, 2007 10:36 am    Post subject: Reply with quote  Mark this post and the followings unread

yea it works like normal when all the switches are on. and it works plugged in. well mine does its a pss-140. i think i killed my psr-6.

anyway, yea. you don't really need to have it on and running to do this bend. its more of a follow the schematic than experimentation. yea. just don't overheat the cpu or solder any of the pins together. it will kill it.

good luck. Wink
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LukeDI



Joined: Sep 23, 2006
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PostPosted: Thu Jun 21, 2007 4:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

12pointfont wrote:
just don't overheat the cpu or solder any of the pins together. it will kill it.

good luck. Wink
Thanks, and that's good advice for any project me thinks. Wink
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listenact



Joined: Jul 06, 2007
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PostPosted: Fri Jul 06, 2007 12:09 pm    Post subject: Bending a PSR-6 Reply with quote  Mark this post and the followings unread

Hi, I'm just gearing up for my first bend, and I've got a PSR-6 too. . . Seems to be a common starting point.

Has anyone discovered one particular bend or mod that they've really found useful and enjoy for this keyboard?

I actually sort of like it and don't want to make it totally glitchy, I'd just like to expand it a little Smile.

Thanks so much! Reading all this had been really helpful!
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ickystay



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PostPosted: Fri Aug 03, 2007 11:30 am    Post subject: Reply with quote  Mark this post and the followings unread

Yesterday found a nice PSS-560 at the Goodwill ($10!). Looks like it is a PSS-470 with 4 extra switches for drum sound variations. It has the YM3812, so add another Yamaha FM keyboard to the list.
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Matana Teknik



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PostPosted: Sat Sep 29, 2007 10:09 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm bending a PSS-570 at the moment because I had one. Never thought it could produce the sounds i'm getting. I'm totally new on this but I think i'm in the right direction. Did some research on the chip here.

http://en.wikipedia.org/wiki/Yamaha_YM3812

and it has ADSR!!! and much more... Razz

I connected two pins and that opens all ..... now it produces tekkno/acid and hardcore shit....wicked!!!

But more on this in the topic Yamaha PSS-570........

Gonna fiddle a little BIT more..

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patrock



Joined: Jan 25, 2008
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PostPosted: Sun Jan 27, 2008 7:27 am    Post subject: Reply with quote  Mark this post and the followings unread

DenDer wrote:
I'm bending a PSS-570 at the moment because I had one. Never thought it could produce the sounds i'm getting. I'm totally new on this but I think i'm in the right direction. Did some research on the chip here.

http://en.wikipedia.org/wiki/Yamaha_YM3812

and it has ADSR!!! and much more... Razz

I connected two pins and that opens all ..... now it produces tekkno/acid and hardcore shit....wicked!!!

But more on this in the topic Yamaha PSS-570........

Gonna fiddle a little BIT more..


Ok, my Yamaha PSR-11 has the same YM3812 chip. I can get insane bends out of the preprogrammed loops, but I want to manipulate the key sounds, any hints?
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Kassen
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PostPosted: Fri May 09, 2008 7:38 am    Post subject: Reply with quote  Mark this post and the followings unread

I just opened up a salvaged PSR3 and that one can go on the list of "definitely not FM", at least it doesn't have the FM chip, just the YM7137 CPU and a LA4192 amp
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