simple clock for Sequencer success!

[Eduardo Saponara]

I'm wondering if anyone knows where I could find a simple schematic for a
suitable tempo clock input for this simple sequencer?

Ok, now prepare for a really beginner qustion.  on schem diagrams,  what do
you actually do when the symbol says to ground?  copper wire to where?  I am
really really new to this and have only built simple kits.  tutorial site
url's would be appreciated as well.

thanks


ed
-----Original Message-----
From: Hairy Harry <paia2720 at hotmail.com>
To: mitch at sirius.com <mitch at sirius.com>; efm at xavax.com <efm at xavax.com>;
synth-diy at node12b53.a2000.nl <synth-diy at node12b53.a2000.nl>
Date: Saturday, October 14, 2000 2:53 AM
Subject: Re: Sequencer success!


>Hi Mitch.
>
>Yes... you could put a resistor in series with the high side of each
>pot...
>
>~or~
>
>CMOS can run on voltages from about 3 to 18 (MAX) volts... if you
>wanted less range you could slap a 5V regulator on the supply comming
>into the PCB.  Or any other voltage you wanted between 3 and probably
>12V (assuming you use a 15 volt supply...).
>
>H^) harry
>
>
>>From: Mitchell Hudson <mitch at sirius.com>
>>To: EFM Synth DIY <efm at xavax.com>, Synth DIY
<synth-diy at node12b53.a2000.nl>
>>Subject: Sequencer success!
>>Date: Fri, 13 Oct 2000 04:37:07 -0700
>>
>>     So the beginners have done it again! Yep they've found the simplest
>>most basic 8 step sequencer they could find, put it together and it
>>mostly works! Two IC's, one transistor and three resisters not counting
>>the front panel components.
>>
>>     I do not remember where I found this schematic, if anyone recognizes
>>this one let me know. I put a copy of it here
>>
>>www.webdevils.com/schematics/SEQ8.jpg
>>
>>     I put this together on a perfboard from radioshaock and made a front
>>panel from a two unit frac panel. I left some room on the panel for one
>>more knob and a couple of extra jacks so I can add a clock at a later
>>date.
>>
>>     There are a few things that need improvement. It has one small
>>problem with the up/down switch. When switched the sequence runs
>>backwards and stops. Not sure what the problem is, I am assuming of
>>course that the sequence should not stop but repeat backwards when the
>>switch is down. everything runs fine in the forward direction.
>>
>>     The output seems a little high, I am assuming there is a range of +
>>a small amount of volts up to +15V. Initial tests using the sequencer to
>>control my VCO, through the v-oct, seem to show that the knobs are only
>>useful for about half of their range. The rest of the range being too
>>high or too low depending on the initial pitch of the VCO. Seems what I
>>really would be looking for would be a range of 0 to +10V? I am thinking
>>there is probably a way to scale the output down a bit with a resister
>>maybe. Though for some reason my beginner instincts are telling there
>>should be an op-amp involved because these things seem to end up in
>>everything and this circuit doesn't have one, yet.
>>
>>     I had the idea that if I built a clock with two outs that flip
>>flopped. I could build a second simple 8 step sequencer and clock each
>>from one of the outs of the clock and get 16 steps out of the two...
>>
>>Thanks
>>
>>--M
>>
>
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