[sdiy] Varying gate lengths (using a monostable multivibrator) for a simple sequencer?

[Julian]

Hello again,

Ive been reading about 555s.

Could i just run through my plan, in the hopes of having all my errors
bought to light? ; )

Trigger the 4017, probably from a roland 606's tom trigger out, via an LM358
in order to give the 4017 the correct sort of voltages.

Take the output from each individual output of the 4017 and pass them
individually through the right type of transistor, to invert the pulse (the
555 triggers on the falling edge, not the rising, right?)

According to the values of the variable resistor and fixed capacitor, the
555's output will go high for varied amounts of time.

I would want a non-re triggering 555.  A re triggering one would not allow
me to shorten the output shorter then the 4017s output, right?

Would then put the 555s output through another transistor, resistor
combination to set the output voltages to the desired level for the
individual gate outputs.




In this, a 555 and its associated parts would be needed for each step.


Yeah, i know this is a real basic circuit for so many of you, but its my
first venture into actually building something from scratch that's not a kit
or just a circuit out of a book.  Any errors or foolishness being pointed
out would be much appreciated.  Or, indeed, if I'm missing the point
entirely. :S


Thankyou, Julian