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 on: November 14, 2022, 09:34:21 AM 
Started by littleghost - Last post by gmeredith
Hey all,

Sorry Ive been away for a long time, life gets busy sometimes. You go through phases.

I have some of that stuff on my band website:

And a bunch of service manuals for many of the Casio bending keyboards.

On my hard drive I archived all of the SK bending and modding stuff, but I need to put them all up sometime. I'll try to find them and put them up on my band server, but it will take a while to make up a page for it all.

Interesting thing, I got an email out of the blue recently from Plutoniq9 (Ryan) who originally came up with many of these mods. He just moved here to Australia where I am, after 20 years in the US. We're now in contact!

Cheers, Graham

 on: September 27, 2022, 04:55:54 PM 
Started by littleghost - Last post by littleghost
The “CasioSK” and “Benders” yahoo groups were a central hub for bending information for years and years until they went down in 2020. Loads of legendary builds were first developed there, like the Casio SK Attack/Decay & Phat Filter mods for example

It seems that despite saving nearly 1 million groups before they went offline for good, both of these were set to “members only”, meaning they weren’t able to be archived :/ There was loadsss of good info in those groups, and it seems like such a tragedy that all of it is basically lost forever.

So just thought i’d ask here, this being one of the oldest remaining bending forums still online: Anyone here save any of that stuff?

Probably pretty unlikely lol, but figured i’d ask on the off chance someone had saved some stuff before they went down

 on: August 25, 2022, 01:48:38 PM 
Started by casio88 - Last post by ahabzutun
Hi all!

I seem to have the same problem. It turns on but no sound at all. I proceeded to replace T1, T2 and T7 with 2SC1740STPR transistors (which should be an equivalent to the 2SC1740SQ transistors mentioned in the service manual). T8 was replaced with an 2SA934SR transistor (which, according to my research should be also equivalent to the 2SA934R transistor mentioned in the service manual). To no avail.

When I turn on the keyboard, T7 and T8 get really hot after a short while. I was actually able to hear some sound when I connected it to the loudspeaker. But it was really quiet and somehow distorted. The behaviour stayed the same even after replacing all the trannies. Any idea what I could check and/or replace? :/

 on: May 14, 2022, 01:18:01 PM 
Started by littleghost - Last post by littleghost
I’m sure many here have noticed the sudden disappearance of several circuit bending sites in recent years. It seems like every month, another old blog, forum, or other community resource goes offline. Many of these sites were active for nearly a decade, and with their closure comes the loss of thousands of tutorials, schematics, diagrams, and countless forum posts full of priceless info accrued by the bending community over the years. Even community staples like GetLofi and Casper Electronics have 404ed recently.

In an effort to try and preserve the resources that still exist, we’ve started the Circuit Bending Wiki!

So, what is it?

The circuit bending wiki has 3 simple goals;

  • To act as a static place for the community to preserve existing info on bending before its gone, in a way that is centralized, collaborative, & easy navigable
  • To also act as a place for benders to share new info (tips, findings, build notes, etc) on specific devices as well as techniques & concepts
  • To create an extensive archive of service manuals, chip pinouts, and other technical documents relevant to circuit benders

How does it work?

Each device has its own dedicated article, where info related to that device can be posted. Lets use the CB Wiki’s article on the Casio SK-1 as an example. The article has a “Documentation” section, containing manufacturer documents like the service manual & chip pinouts. There’s also a “Community Documentation” section, where users can share info related to circuit bending like schematics, bend points, build notes, etc.

We don’t have an article for every commonly-bent device yet, but we hope to eventually. We’re building them as we go, and it’s up to the community to help make this Wiki the powerful resource it has the potential to be. If we’re missing an article for a device you’d like to see, feel free to create one!

Aside from the device articles, there’s also our catalog of service & operation manuals, which we hope to expand with the help of the community. As well as our “List of Resources”, a list of sites with valuable info for benders. We’re also hoping to have a list of common sound chips & pinouts created soon as well.

How do I contribute?

First and foremost, editing is open to all.

If you have any files you’d like to archive or share (manuals, schematics, images of bend points, circuit diagrams, etc), you can upload them to the Wiki HERE. After which they’ll be available on our “Files List”. page until someone can integrate them into articles.

If you’d like to contribute an article, visit our ”Planned Articles” page to see what we have on our to-do list. Our page on the SK-1 is meant to serve as a template for creating new articles, to make the process quick & easy.

Any suggestions for articles can also be added to the “Planned Articles” page.

If anyone has any questions, feel free to pose them in the replies, and we hope to see you over on the Wiki! Here’s hoping this is the start of a new, powerful resource for the community.

 on: March 27, 2022, 05:07:48 PM 
Started by iwillbeacircuitbender - Last post by iwillbeacircuitbender
Okay, so do you guys know about this site. This has ROM dumps of alesis systems, yamahas, and others. Here is the link to it:

 on: February 13, 2022, 05:33:47 PM 
Started by flyagaricus - Last post by flyagaricus
I have to connect a few more patch points internally, but this project is pretty much complete. My first bend  :)

 on: January 23, 2022, 03:11:09 AM 
Started by slayerz - Last post by channelite
I did a test with a 9v dc and 12v dc power adaptor powering the cb55 and the 12v makes the cb55 louder. The 9v still works, just has a lower volumes.  If that info is useful to you...

 on: January 22, 2022, 05:22:24 PM 
Started by Circuitbenders - Last post by slayerz
I think there might be a mistake in the build guide, isn't pin 1 on TRIG_IN2 the snare and not the hat? I get a snare on pin 1 and a hat on pin 2, so I looked at the schematic and it looks like it's going to the snare. Also, pin 3 on TRIG_IN1 (snare) leads to pin 1, so I think that reaffirms it?

 on: January 22, 2022, 05:16:19 PM 
Started by slayerz - Last post by slayerz
I use the Olegtron 4060 with the CB55, which has a power starve knob. Starving the power causes the CB55 to get distortion or unexpected sounds, which is kind of cool.  When there is no starving, which the normal gates are send from the Olegtron, the CB55 sounds normal.

Thanks, but I don't mean to actually use a lower voltage to trigger - I want to modify the trigger conditioning circuit, where the opamp comparators are fed off 9v, so it accepts a 3.3v trigger and translates it to 5v. I guess I'll just try both and see

 on: January 21, 2022, 02:59:36 AM 
Started by slayerz - Last post by channelite
I use the Olegtron 4060 with the CB55, which has a power starve knob. Starving the power causes the CB55 to get distortion or unexpected sounds, which is kind of cool.  When there is no starving, which the normal gates are send from the Olegtron, the CB55 sounds normal.

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