After circuit diagram and description Musicolour III

Guest
Back in the 70's, Electronics Australia published a kit design for a
Musicolour 3. I have one that has ceased to work. Has anyone got a
copy of the original circuit and circuit notes? Would appreciate a
copy.

Cheers
Greg Smith, WA
 
<gsmithwa@gmail.com>
Back in the 70's, Electronics Australia published a kit design for a
Musicolour 3. I have one that has ceased to work. Has anyone got a
copy of the original circuit and circuit notes? Would appreciate a
copy.
Click to expand...

** That could be the one published in the December 1971 issue, with PCB
labelled as " 71C12 " - OR it could be the one in September 1976, with
PCB labelled as "76PC9 ".




....... Phil
 
On May 13, 12:25 pm, "Phil Allison" <philalli...@tpg.com.au> wrote:
gsmit...@gmail.com



Back in the 70's, Electronics Australia published a kit design for a
Musicolour 3. I have one that has ceased to work. Has anyone got a
copy of the original circuit and circuit notes? Would appreciate a
copy.

** That could be the one published in the December 1971 issue, with PCB
labelled as " 71C12 " - OR it could be the one in September 1976, with
PCB labelled as "76PC9 ".

...... Phil
Click to expand...
I read in the current issue SC that a new Musicolour project is coming
in the next month or two, using a dsPIC.
I wonder, would the Musicolour be the longest running and most updated
Aus magazine project?

Dave.
 
David L. Jones wrote:
On May 13, 12:25 pm, "Phil Allison" <philalli...@tpg.com.au> wrote:
gsmit...@gmail.com



Back in the 70's, Electronics Australia published a kit design for a
Musicolour 3. I have one that has ceased to work. Has anyone got a
copy of the original circuit and circuit notes? Would appreciate a
copy.
** That could be the one published in the December 1971 issue, with PCB
labelled as " 71C12 " - OR it could be the one in September 1976, with
PCB labelled as "76PC9 ".

...... Phil

I read in the current issue SC that a new Musicolour project is coming
in the next month or two, using a dsPIC.
Click to expand...
Sounds about right.
Why not use a DSP/Microcontroller when a few opamps will do?
Probably means they can keep the code a secret and sell pre-programmed devices...

I wonder, would the Musicolour be the longest running and most updated
Aus magazine project?

Dave.
Click to expand...
 
"David L. Jones"

I wonder, would the Musicolour be the longest running and most updated
Aus magazine project?
Click to expand...

** I wonder if there is ANY other project published by EA , SC or ETI
that is KNOWN to have caused the death of a constructor after it was sold
to them as a kit by DSE ??


WARNING:

If ever you construct or attempt to service one of the several " Musicolour
" projects - make ABSOLUTELY CERTAIN you have a ELCB or " Safety
Switch " in line within the AC supply to the unit whenever the lid is off.

Or you may become the second, known fatality in Australia.



....... Phil
 
Phil Allison wrote:
"David L. Jones"

I wonder, would the Musicolour be the longest running and most updated
Aus magazine project?


** I wonder if there is ANY other project published by EA , SC or ETI
that is KNOWN to have caused the death of a constructor after it was sold
to them as a kit by DSE ??


WARNING:

If ever you construct or attempt to service one of the several " Musicolour
" projects - make ABSOLUTELY CERTAIN you have a ELCB or " Safety
Switch " in line within the AC supply to the unit whenever the lid is off.

Or you may become the second, known fatality in Australia.



...... Phil
Click to expand...
IIRC, they were switching the neutral to the load, so the lamp was floating at
mains voltage, even when 'off'.
 
"swanny"
Phil Allison wrote:
"David L. Jones"

I wonder, would the Musicolour be the longest running and most updated
Aus magazine project?


** I wonder if there is ANY other project published by EA , SC or ETI
that is KNOWN to have caused the death of a constructor after it was
sold to them as a kit by DSE ??


WARNING:

If ever you construct or attempt to service one of the several "
Musicolour " projects - make ABSOLUTELY CERTAIN you have a ELCB or
" Safety Switch " in line within the AC supply to the unit whenever the
lid is off.

Or you may become the second, known fatality in Australia.



IIRC, they were switching the neutral to the load, so the lamp was
floating at mains voltage, even when 'off'.
Click to expand...

** No - the active was switched

Which mean all the heatsinks on the triacs were permanently at 240 volts AC.




....... Phil
 
On May 13, 4:11 pm, swanny
<blahgswan3b...@blahbigpondblah.comblah.blahau> wrote:
David L. Jones wrote:
On May 13, 12:25 pm, "Phil Allison" <philalli...@tpg.com.au> wrote:
gsmit...@gmail.com

Back in the 70's, Electronics Australia published a kit design for a
Musicolour 3. I have one that has ceased to work. Has anyone got a
copy of the original circuit and circuit notes? Would appreciate a
copy.
** That could be the one published in the December 1971 issue, with PCB
labelled as " 71C12 " - OR it could be the one in September 1976, with
PCB labelled as "76PC9 ".

...... Phil

I read in the current issue SC that a new Musicolour project is coming
in the next month or two, using a dsPIC.

Sounds about right.
Why not use a DSP/Microcontroller when a few opamps will do?
Probably means they can keep the code a secret and sell pre-programmed devices...
Click to expand...
This one is all FFT apparently, guess it allows you to do lots of
fancy stuff?
Hence the dsPIC programmer in this months SC.
If it's an actual SC project then the source code should be available.

Dave.
 
"Phil Allison"
IIRC, they were switching the neutral to the load, so the lamp was
floating at mains voltage, even when 'off'.


** No - the active was switched

Which mean all the heatsinks on the triacs were permanently at 240 volts
AC.
Click to expand...

** Or I should have said the COMMON heatsink was at 240V AC.



.... Phil
 
In article <3ee1eb6b-16c5-41cb-94ba-6d9803b7a2a1
@w4g2000prd.googlegroups.com>, altzone@gmail.com says...
On May 13, 4:11 pm, swanny
blahgswan3b...@blahbigpondblah.comblah.blahau> wrote:
David L. Jones wrote:
On May 13, 12:25 pm, "Phil Allison" <philalli...@tpg.com.au> wrote:
gsmit...@gmail.com

Back in the 70's, Electronics Australia published a kit design for a
Musicolour 3. I have one that has ceased to work. Has anyone got a
copy of the original circuit and circuit notes? Would appreciate a
copy.
** That could be the one published in the December 1971 issue, with PCB
labelled as " 71C12 " - OR it could be the one in September 1976, with
PCB labelled as "76PC9 ".

...... Phil

I read in the current issue SC that a new Musicolour project is coming
in the next month or two, using a dsPIC.

Sounds about right.
Why not use a DSP/Microcontroller when a few opamps will do?
Probably means they can keep the code a secret and sell pre-programmed devices...

This one is all FFT apparently, guess it allows you to do lots of
fancy stuff?
Hence the dsPIC programmer in this months SC.
If it's an actual SC project then the source code should be available.

Dave.
Click to expand...
I found Discolitez to be great piece of kit.

It's a free winamp plugin, and allows you to control lights according to
amplitude or frequency ranges.
It drives the good ol LPT port - if your PC has one these days :-\

Ray
 
On May 13, 6:46 pm, "Phil Allison" <philalli...@tpg.com.au> wrote:
"Phil Allison"



IIRC, they were switching the neutral to the load, so the lamp was
floating at mains voltage, even when 'off'.

** No - the active was switched

Which mean all the heatsinks on the triacs were permanently at 240 volts
AC.

** Or I should have said the COMMON heatsink was at 240V AC.

... Phil
--------------------------------
Click to expand...

I remember in incident of a person getting zapped by one of these
units at the local roller skating rink back in the 1980s, by a person
(probably the DJ) being "expert" without any actual knowlege of
electronics, deciding to remove the cover, and leave it off (while
still using the remaining channels) after failing to work out why one
channel didnt work anymore. Only a matter of time before someone
"touched" the insides.

Fortunately it wasnt fatal.


Also, in the same place remember seeing a series load of 12v "car
headlight" style sealed beams, that were wired in series (not enough
of them to make up the full 240v), some being housed in ceramic
flowerpots lined with tinfoil and coloured cellophane over the top of
them.

When I think back Its amazing there weren't more fatalities from
electrocution.
 
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