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Title: Casio SA-20
Post by: Hatchetjob on January 21, 2009, 03:17:27 PM

Hi

Does anyone have any expierence with bending the Casio SA-20?

Can anyone please tell or show me the bend points on this sucker.I have looked all over but cant find a good bend guide for it!!!

Thanks ;D ;D ;D

Title: Re: Casio SA-20
Post by: Circuitbenders on January 22, 2009, 08:13:58 AM

Isn't the SA20 just an SA1 or SA5 with 2 speakers? I'm sure all their mods will be roughly applicable.

Title: Re: Casio SA-20
Post by: goldenbaby on January 22, 2009, 09:31:53 PM

I've been surprised before by the irrelevance of information regarding one SA to another one. At the least, the circuit boards are not all identical.

Perhaps you're referring strictly to these 3 SAs.

Title: Re: Casio SA-20
Post by: dimefan90 on January 23, 2009, 12:36:06 PM

the sa20 has different circuit board, it has a smaller one that is seperate.

Title: Re: Casio SA-20
Post by: Hatchetjob on January 26, 2009, 01:46:59 PM

Alright guys i think i have this.I will post some pics in next week or so.

As stated the board is different to other sa's

There is a long thin board which is attached to the keys and a seperate smaller board that has the dc in etc.Anyways you have to unsrew the smaller board and flip it over.There you will see small jumpers like on sa1.I cut the jumper that is beside the green thing and replaced with a 470 resistor.

Im going to attempt the deep crash and low pass - will post pics when all has been done.....

8)

Title: Re: Casio SA-20
Post by: blipsahoy on July 25, 2010, 03:14:08 AM

It would be awesome if someone actually did a diagram of this one, relatively little information about this SA.

Title: Re: Casio SA-20
Post by: Orangery on July 27, 2010, 03:27:48 PM

Hatchetjob, so you mean 470k or ohms? Is this for the voltage drop?

I recorded a lot of stuff from this machine but nowadays it only seems to chuck out noise rather than odd melodies that it used to... I have messed about with it so much. I would have to take it apart again to find out where I soldered wires (5-minute job?).

Orangery.

Title: Re: Casio SA-20
Post by: Gordonjcp on July 28, 2010, 04:27:56 PM

Hatchetjob, so you mean 470k or ohms? Is this for the voltage drop?

Use a bit of sense ;-) 470k would be *way* too much for a voltage drop.

Title: Re: Casio SA-20
Post by: adamduke on October 13, 2010, 09:20:58 PM

this guy is just waiting for me to get the last one of my random unfinished projects off my work table - he needs an LFO for the opposite side. It was fun...I learned a lot while making it, but somehow managed to kill the upper quarter of my keys (?)...not sure what happened.

(http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs401.ash2/67957_439844037332_516277332_5249966_610173_n.jpg)

(http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs450.ash2/72367_439844887332_516277332_5249986_5014443_n.jpg)

Title: Re: Casio SA-20
Post by: Ciderfeks on October 14, 2010, 12:42:58 AM

Quote from: adamduke on October 13, 2010, 09:20:58 PM
I learned a lot while making it, but somehow managed to kill the upper quarter of my keys (?)...not sure what happened.

Having no experience with one of these, this is a pure guess.... If there is a ribbon cable connecting the keyboard section to the IC board, these can be fragile. I had a similar problem with a kids phonics/alphabet toy that had a small built in keyboard that had stopped working on the top third of the keys, due to a dodgy ribbon cable. Worth a look as it's an easy fix.

Title: Re: Casio SA-20
Post by: jamiewoody on October 14, 2010, 04:04:55 AM

i did an lfo on mine and i LOVE it! it reminds me of a hing hon with it! i tried a lot of the other "casper" mods, and didn't really like them. no offense to casper's genius, just not for me. it is a lot more synthlike with the lfo!

Title: Re: Casio SA-20
Post by: adamduke on October 14, 2010, 04:41:04 AM

thanks Ciderfeks, will check on that.

;)

Title: Re: Casio SA-20
Post by: jamiewoody on October 14, 2010, 07:20:00 PM

nice photos...i like tha black/white with inverted keys!

Title: Re: Casio SA-20
Post by: gregisclassy on February 12, 2012, 06:43:35 PM

is there any way a brother could get a bending diagram on this? or even a picture of your bends.

Title: Re: Casio SA-20
Post by: feverrayman on February 14, 2012, 03:27:42 AM

Quote from: adamduke on October 13, 2010, 09:20:58 PM
this guy is just waiting for me to get the last one of my random unfinished projects off my work table - he needs an LFO for the opposite side. It was fun...I learned a lot while making it, but somehow managed to kill the upper quarter of my keys (?)...not sure what happened.

]http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs401.ash2/67957_439844037332_516277332_5249966_610173_n.jpg[/img]

(http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs450.ash2/72367_439844887332_516277332_5249986_5014443_n.jpg)

wow! that used to be an SA-20?? :o love what you did to it, how did you get rid of and replace all those stock buttons with what looks like some sort of white panel?

Title: Re: Casio SA-20
Post by: Bogus Noise on February 14, 2012, 02:40:23 PM

Looks to me like the stock buttons have been sprayed black, and the rest of the casing has been sprayed white. The panel section just used to have patch names on it.

(http://kepfeltoltes.hu/100407/Sa20_01_www.kepfeltoltes.hu_.jpg)

Circuitbenders Forum

Circuitbenders Forum => Circuitbending discussion => Synths & Samplers => Topic started by: Hatchetjob on January 21, 2009, 03:17:27 PM