[sdiy] understanding this one transistor F to V

[Dan Snazelle]

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ok but it is driving the supply lines of the oscillator? so isnt it then cr=
eating a voltage? when i made a few adjustments to the circuit=2C i was get=
ting some interesting results. a plucked note would make my scope rise from=
 0 to around 5 volts (roughly) and then it would slowly swoop back down. i =
hooked it up to a transistor/40106 setup and was able to get sweeps out of =
the 40106 oscillator but it was hardly in tune with the guitar!! anyway...y=
our explanation makes sense as i have certainly never seen such a simple F =
to V before. i was sort of hoping that I could tweak it enough to get this =
to drive a VCO thanks>> On Nov 3=2C 2009=2C at 4:24 AM=2C Ren=E9 Schmitz wr=
ote:>>> Eric Brombaugh schrieb:>>> Sure looks like a simple flip-flop divid=
er to me.>>>> But thats not a FF but an astable oscillator.>> Well=2C yes. =
I've heard the cross-coupled circuit on the right called an> 'astable flip-=
flop'=2C so let's split the difference. My point though is> to clarify for =
the OP that the way this circuit is set up there is no> explicit conversion=
 from frequency to voltage. Instead=2C the input> signal is amplified and d=
rives the supply lines of the astable flip-> flop in such a way that the re=
sult is to divide the input signal's> frequency by two.>> At least that was=
 my thought based on a quick glance at the circuit.> If you've got a differ=
ent interpretation I'd be interested to hear it.>> Eric> __________________=
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