Shit!!! anyway i would find something to do with those chip...
Thanks for the advice

bizz


--- In tr-707@yahoogroups.com , "foleymachine" <foleymachine@y...>
wrote:

> ah, should have been more clear about this:
>
> the cmos version of the 555 is a different chip altogether; it

draws

> a lot less power and doesn't soft sync to nearby 555s as badly. it
> would probably work if you used the normal 555, but not as well.

when

> i started with normal 555s the pitches affected eachother (soft
> sync). usually they are called 7555 or LMC555. radio shack carries
> them, but often only like 3 at a time, luckily i live near 3 radio
> shacks. the oscillator schematic is the standard one, i just made

one

> like this:
>
> http://www.interq.or.jp/japan/se-inoue/e_ckt5_1.htm
>
> except Ra=1k, Rb=100k pot, and C is like .1uF i
> think. if you have a breadboard, it's probably a good idea to get

an

> oscillator circuit on there first and make sure it's working

before

> building them all onto a board and then having to wrench

components

> back out. if the oscillator doesn't go low enough for you, you can
> attach more capacitors in parallel; putting two .1 uF in the same
> spot will give you .2 uF i think.
>
> hope you didn't waste a lot of $$ on the 555s. if it's any
> consolation i have a bunch sitting around that i probably won't

use

> either since the cmos version is more useful.
>
> --- In tr-707@yahoogroups.com , "bisaillon3" <bisaillon3@y...>

wrote:

> > I bought a bunch a 555 chip and now i try to find the schematic

of

> > cmos version... it is possible to draw me the schematic or send

it

> > in the file room. I got no news from roland for the m64-c

cartridge

> > and i still building my eprom burner for the 707. I keep u in

touch

> > with my progress.
> >
> > bizz
> >
> >
> > --- In tr-707@yahoogroups.com , "foleymachine"

<foleymachine@y...>

> > wrote:
> > > yes, each pin corresponds to one (or one pair) of the
> instruments:
> > > BD1/2, SD1/2, LT, MT, HT, RIM/COW, CP/TAMB, OH/CH. that is

except

> > for
> > > the ride/crash, which has a different clock input that i
> mentioned
> > in
> > > a later email. i don't know which pins are for which sounds, i
> > just
> > > hooked them up and then mounted the knobs after testing them.
> > > basically what's going on is the samples are like 32khz or
> > whatever,
> > > and there is a corresponding fixed 32khz squarewave coming out

of

> > a
> > > chip and connecting to all of the clock input pins.

disconnecting

> > > them gives you clock inputs into which you can send individual
> > > variable-speed squarewave 555 oscillators, which act as
> individual
> > > variable-speed sample playback clocks.
> > >
> > > the pots i used are pretty small, they're like stompbox pots
> > except
> > > the shaft is a little longer. i mounted them all at the bottom

of

> > the
> > > case, underneath the corresponding sound names. the board with
> the
> > > oscillators is just kind of crammed in between the pots and

the

> > two
> > > main boards. i lined the 555s all up in a row to make the

board

> > > narrow and long.
> > >
> > > hot sounds: the snare is really bitchin tuned down, it's like
> this
> > > heavy tight smashing sound. tuned up it's nice and march-y
> > sounding.
> > > the tamborine is also really great low down, it sounds like

this

> > > faraway clanging down at the shipyard or something. of course
> > > everything else sounds cool too. the sounds really lose
> > > their "realism" (great!) when tuned either up or down, i think
> > this
> > > is because they are only eight bit, nice and chunky. also you
> hear
> > > the aliasing noise when you tune them down below the frequency

of

> > > their anti-aliasing filters.
> > >
> > > let me know if you have any other questions,
> > > greg
> > >
> > >
> > > --- In tr-707@yahoogroups.com , "djdsl_tru" <dsl_tru@h...>

wrote:

> > > > This sounds awesome.. i cant wait to try this mod out.

Sounds

> > like
> > > > itll be the perfect complement to my heavily bent 626, hell,
> > maybe
> > > > it'll work on that box too, if ive got any room left in it

that

> > is.
> > > > Your'e description is a little hard for me to follow

though.

> > Maybe
> > > > when I have my 707 open, it'll all come together. Do each of
> the
> > > pins
> > > > that you're disconnecting (56, 57, and 59-64 of ic30 )
> > correspond
> > > to
> > > > one of the instruments
> > > > Howd you mount all the pots too.. you mustve got some mini

ones.

> > > > Thanks, and its comforting to know theres a few other

peoples

> > out
> > > > there breathing life into the somewhat dead sounds of

rolands

> > line.
> > > >
> > > >
> > > > --- In tr-707@yahoogroups.com , "bisaillon3"

<bisaillon3@y...>

> > wrote:
> > > > > > --- In benders@yahoogroups.com , "foleymachine"
> > > <foleymachine@y...>
> > > > > > wrote:
> > > > > > > hi,
> > > > > > >
> > > > > > > in case anyone is interested, i added pitch knobs for
> each
> > of
> > > > the
> > > > > > > sounds in my 707.