[sdiy] Building on Pad Per Hole?

[ryan]

Hi Charles,

I'm quite a beginner myself and have been messing with this circuit for a
few weeks now.
Last night I built one of these VCOs on a pad per hole board. I think it's
something
you can do without alot of electronic skills . go for it. but just make sure
you be
careful. When I was building mine I made a few mistakes on the layout and
burned up 2 CD4069 chips before I fixed the problem. But if you follow the
layout on the site I think it should be easier. I had to change the layout
cause cause I modified the circuit a little.
So the problem I had was that I hooked up the -15V to the 4069 chip instead
of the +15V. Its probably a good idea to use those chip sockets incase you
do make a mistake and even then, power up the circuit without the ICs
installed and hook a volt meter up to the power pins and make sure you got
the right voltages at these places. I promised myself I'd start doing that
after I burned up a microcontroller last week the same way...

Making your own layout isn't all that difficult either. I'm learning eagle
layout which someone has already mentioned but I did my layout for this
circuit on paper. It took about an hour or two, but I think that eagle is
probably a much better way since once you get the schematic right its hard
to go wrong as long as the layout passes all the tests.  Eagle is also free.

some other people have also built this circuit and made pages about it:
http://www.aleph.co.jp/%7Etakeda/radio/farmVCO4069E.html
has some good ideas and a modified circuit and layout.

...ryan


> Hello all,
>  This is my first time posting to the list, I've been reading for a few
> months now. I have have decided that I want to build my first synth and
> right now I am in the design phase.
>
>  However, my electronics skills are not quite up to par. I've built
> simple stuff like a 555 circuit, but nothing more complex. I have seen
> many places online with what look like simple circuits, sometimes with
> a layout, sometimes without.
>
> This is the oscillator I am going to try to build:
> http://www.uni-bonn.de/~uzs159/vco4069.html
>
> I choose this one because it provides the layout on pad per hole board.
> I cannot make PCBs, I don't have the facilities. Do you experts think
> this would be a good first module to try (after the power supply)?
>
> I'm still looking for other modules to complete the synth. Right now I
> want to build an LFO, EG, VCF, and VCA to go with all this. Could
> anyone provide a simple LFO layout on pad per hole board?
>
> Thanks for reading this, I hope someone can give me a little help.