303 clone sequencer?

[Fraser, Colin J]

> -----Original Message-----
> From: Janne Heikkarainen [mailto:jaheikka at cc.spt.fi]
> Sent: 03 November 1998 14:00
> To: synth-diy at mailhost.bpa.nl
> Cc: synth-diy at mailhost.bpa.nl
> Subject: Re: 303 clone sequencer?
> 
> 
> > > I'm sorry but I cloned it this weekend and got a great 
> working vco and vcf. I
> > > even made a mod to the filter so i can work up the 
> resonance all the way to
> 
> has anyone ever cloned the sequencer? that would be a very 
> interesting 
> project...and has anyone reworked and revised the parts of 
> the original
> tb303 schematics?
> 


I know a guy in germany who built a 303 sequencer using a new PCB layout,
but with an original 303 microprocessor he bought from Roland.
He kindly sent me a set of the PCBs for the processor and switch boards, but
so far I have been unable to find an original processor.

When I finally get my AVR Risc microcontroller programmer built. one of my
projects will be to reverse engineer a replacement up for the 303 using the
original hardware design, with added midi for sysex dumps of the pattern
memory.

I expect this may take some time tho'.
I believe there are others who may be further down this path.

Colin f