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1964Kyle
Joined: Feb 10, 2012 Posts: 6 Location: USA
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Posted: Fri Feb 10, 2012 5:53 pm Post subject:
SK-1 auto power off question |
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Hi all,
I read that one person on here was able to defeat the dreaded auto-power off on the Casio SK-1 with a simple 555 circuit.
http://electro-music.com/forum/post-266638.html
I went to the store to buy the parts, however the clerk told me that I needed the specific voltage relay in order for it to work. Does anyone know what this voltage would be?
thanks,
Kyle |
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umschmitt
Joined: Jun 29, 2011 Posts: 189 Location: brrlin
Audio files: 11
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1964Kyle
Joined: Feb 10, 2012 Posts: 6 Location: USA
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Posted: Sat Feb 11, 2012 8:43 am Post subject:
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hey, I tried it. however, it didn't work. I just got the voltage from Maxime, & will try that soon. |
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umschmitt
Joined: Jun 29, 2011 Posts: 189 Location: brrlin
Audio files: 11
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Posted: Sat Feb 11, 2012 2:44 pm Post subject:
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OK then. Err by the way, why use a relay ? I used optocouplers to electrically simulate the press of a switch on mine, and Top Top used 4066's (I even suspect a transistor would make it)… I must be missing something. _________________ ::U::N::S::C::H::N::E::L::L:: |
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1964Kyle
Joined: Feb 10, 2012 Posts: 6 Location: USA
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umschmitt
Joined: Jun 29, 2011 Posts: 189 Location: brrlin
Audio files: 11
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Posted: Sat Feb 11, 2012 4:55 pm Post subject:
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1964Kyle wrote: | I'm not sure really. That was the only success story I've heard from this mod (besides the jumper one which didn't work for me). And, this circuit seems pretty simple with a 5V relay. What would you recommend? |
I don't know ! I was just hoping someone would give me an explanation ! Anybody around ? _________________ ::U::N::S::C::H::N::E::L::L:: |
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corex
Joined: Mar 02, 2010 Posts: 114 Location: Las Vegas
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Posted: Mon Feb 13, 2012 11:45 am Post subject:
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This is an interesting approach, but for my SK-1 I used a simpler method. You can just cut a trace and add a jumper to defeat the automatic shut-off, but when I did that I noticed that I also lost the ability to power off with the front switch, so I added another switch to physically disconnect power and provide a real "OFF".
The disadvantage of this approach is that you need to have both the real physical switch off and also the SK-1's original switch off, then turn on the real switch, then turn on the original switch. Powering on the physical power switch while the original switch is still in the on position causes some initialization failure or something and it doesn't make noise. So there's an order to the switches. An advantage of this approach is that it's easy to remove power and recover from circuit bending crashes, and obviously it never powers off by itself. |
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1964Kyle
Joined: Feb 10, 2012 Posts: 6 Location: USA
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Posted: Mon Feb 13, 2012 3:20 pm Post subject:
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Hm... that seems like it would work for me. would you mind elaborating which trace to cut and where to put the jumper? Also, where do I add the switch in the circuit?
thank you,
Kyle |
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corex
Joined: Mar 02, 2010 Posts: 114 Location: Las Vegas
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1964Kyle
Joined: Feb 10, 2012 Posts: 6 Location: USA
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Posted: Tue Feb 14, 2012 2:19 pm Post subject:
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Oh, yea I already mentioned I tried this but after 6 min it remained on but there was no sounds. It may be cause I have a concertmate version.
Kyle |
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umschmitt
Joined: Jun 29, 2011 Posts: 189 Location: brrlin
Audio files: 11
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Posted: Tue Feb 14, 2012 2:37 pm Post subject:
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Ha, that's interesting ! So you think the different chips correspond to the actual brands (Casio vs. Realistic) ? I always thought Radio Shack put their own logo on regular instruments…
(might not be worth for me to try the APO disable thing, then) _________________ ::U::N::S::C::H::N::E::L::L:: |
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corex
Joined: Mar 02, 2010 Posts: 114 Location: Las Vegas
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Posted: Wed Feb 15, 2012 12:46 pm Post subject:
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I missed that earlier post about electri-fire's hack. Bummer it won't work for you. |
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1964Kyle
Joined: Feb 10, 2012 Posts: 6 Location: USA
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Posted: Sun Feb 19, 2012 12:43 pm Post subject:
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hey guys,
does this seem to be the right way to hook up the relay to the circuit? Also, where would I get the input power from? would it be the main dc in jack?
thanks,
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RotomotioN
Joined: Mar 02, 2013 Posts: 9 Location: Netherlands
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Posted: Sat Mar 02, 2013 4:16 pm Post subject:
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Note: some Radio Shack (as you call it, stores were named Tandy here) products were from other companies, but were definately different. Who remembers the Realistic synth made by Moog? It was never sold under the Moog brandname.
BTW: will this shutdown bypass work on my SK 5 as well? |
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elmegil
Joined: Mar 20, 2012 Posts: 2177 Location: Chicago
Audio files: 16
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Posted: Sun Mar 03, 2013 9:15 am Post subject:
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Totally off topic:
Tandy used to be a leathercraft store, and in fact, in my part of the world (central USA) I never associated the two until the 80's.
I was going to give a long speil about how the two were separate, except I see that Tandy bought Radio Shack in 1962, so the relationship existed much longer than was obvious
http://en.wikipedia.org/wiki/RadioShack#The_first_40_years |
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RotomotioN
Joined: Mar 02, 2013 Posts: 9 Location: Netherlands
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Posted: Tue Mar 05, 2013 4:01 pm Post subject:
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Very offtopic, indeed! I was wondering 'bout my SK5 though... |
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DATMC
Joined: Oct 13, 2013 Posts: 2 Location: ROTTERDAM
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