freq to voltage converter???

[Johan]

"..well behaved square-wave.."..
...thats why I suggested the schmitt-trigger..balance the input so it lies inbetween the deciding values and a guitarsignal should result in a squarewave. if you make it slightly offset it would also be gating ( low or high on the S.M output ) and you'll have an automatic noisegate built in....

Johan

[idlefaction]

this appeals to my 'i like one-transistor circuits' side:

http://graffiti.virgin.net/ljmayes.mal/pump/transistorpump.htm

the top bit by itself could be a very interesting staircase-waveform generator...  throw a low-pass filter, scmitt trigger and buffer in front, and a buffer on the output, and have switchable values for one of the capacitors, and you could have some serious octave-down action  

there's some maths there showing you how to design a circuit using discrete components and any kind of V/Hz slope...  hth  

[Ansil]

lm2917 data sheet states a 28v supply voltage..   wahhhhhhhhhh   isn't that a little extreme

[R.G.]

lm2917 data sheet states a 28v supply voltage.. wahhhhhhhhhh isn't that a little extreme

28V is the absolute max, above which the chip self destructs.

The electrical operating characteristics are specified in the data sheet for typical conditions of Vcc=12V, and other chip characteristics are specified down to a Vcc=6V. I have used the chip at 9V and it works very well there. It's intended for automotive applications where the Vcc would nominally range from 6V to 13.2V.

[Ansil]

ahhh .. i see thanks i am at teh librarry and i couldnt' get the whole thing to load,