[sdiy] 555 vco success

[Scott Gravenhorst]

Excellent!  When something you made works, it's a total
thrill, is it not?  Now you can play with it!

Interesting that they don't soft synch.  I 'measure'
how close together the VCOs are tuned before synching
by getting them  as close as possible and then timing
how long it takes the phasing sound to repeat.  Someone
correct me if this is wrong, but if that phasing sound
takes one second to complete, the oscillators are 
detuned by 1 Hertz.  If it takes 5 seconds, then they
are at 0.2 Hz apart (1/5 Hz), etc. This is how I determine
what resistance to soft synch the circuit has.  The smaller
the number of Hz, the better.

"TheMysticSatin" <elmystico at earthlink.net> wrote:
>
>----------
>2 vcos fromt he same timer...how can they _not_ be hard synched? hard
>>synched with possible phase offset anyway. Maybe I'm not understanding,
>>maybe you're not being entirely rigorous with your terms....could you
>>explain? If you hear the phasing of vco's slightly out of tune, they're
>>not synched...
>>
>Maybe not... but not intentionally
>When I had both vco's working I could get them EXTREMELY close for chorusing
>effects without them locking on to the same frequency... Who knows why
>not??!!??  I actually have them both working again after replacing a bad
>Xsistor but it's too late at night to test audio!  more later.

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-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
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