[sdiy] another amusement from goldmine

[R. Drake]

rude,

actually, i _am_ putting it to serious use... just not as a sequencer.  i'm
quite partial to circuits that are not predictable.  to each his (or her)
own, eh?.


lbd


on 11/25/03 6:53 PM, Rude 66 at r.lekx at chello.nl wrote:

> 
> i built this a few months ago from a web site schematic. same idea, same
> problem. it functions very erratic, sometimes a pot does nothing and
> sometimes bang! one pot ill make it do something completely different. i
> even came to the same conclusion.. cool toy, but for serious use.. hmm, no.
> 
> r./
> 
> 
> 
> ----- Original Message -----
> From: "R. Drake" <rdrake at data2action.com>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, November 26, 2003 12:49 AM
> Subject: [sdiy] another amusement from goldmine
> 
> 
>> When I ordered my LM13600s, I risked an extra $15.75 on their "10 Note
> Sound
>> Kit".  The description reads: "Make robot sounds, computer effects, etc.
>> Synthesizer features 10 adjustable notes, variable pitch and speed..."
>> Sounded like it had some noize potential, and the price was worth a
> gamble.
>> 
>> Turns out to be a straightforward litte gizmo: a 555 clock running into a
>> 4017 counter; each of the 10 steps from the counter goes thru a trim pot;
>> and the resulting voltages are then fed as a cv to another 555 oscillator.
>> Even has a "glide" switch to slur between notes.  At first I thought I
> could
>> maybe tweak this into a poor mans sequencer, so I built it up into a
> project
>> box, swapping out the trimmer pots for panel mounts from the junk box.
> Also
>> added a range switch to the clock to take it up into audio frequencies.
>> 
>> Anyway, it's a little too flaky to be any use as a sequencer... among
> other
>> things, the 10 pots are all tied together on one end, so they interact.
> But
>> its a fun little noizemaker on its own, especially when the clocked at
>> extreme low or high rates.  I also added a tap of the control voltage, and
>> fed that to my blacet vco... now we're cookin!
>> 
>> I'd recommend it as a evening's project, especially for my fellow beginner
>> diyers...
>> 
>> 
>> cheers,
>> 
>> lbd
>> 
>>> 
>>> My batch of LM13600s arrived today.
>>> 
>>> Crow
>>> /**/
>> 
>>