[sdiy] Low Frequency Square to Sine Waveshaper

[Kyle Stephens]

Using a 555 timer and a 4024 ripple counter, I want to
make an LFO with several outputs at 1/2n of the master
clock frequency. At lowest, this'll go to about 0.1 Hz
(not the clock freq but at the lowest divisor, 1/6 or
1/8, depending on how many outs I ultimately use).

Square waves are fine and dandy, but I'd like some
sine wave action too. For getting consistent shaping
(not absolutely necessarily accurate, but cool if
that's doable), what would work best? Would RC lowpass
filters alone do the job?