Lewis Carson a écrit :
I found this circuit online.

http://members.ozemail.com.au/~bisagoma/step_sine.jpg
I found this circuit online.

http://members.ozemail.com.au/~bisagoma/step_sine.jpg

And re-drew it as follows.

http://members.ozemail.com.au/~bisagoma/step_gen.jpg

But ... it does not appear to work as described. The input is a 512 Hz
clock pulse. The output on pin 3 of the CD4051 is a slightly noisey
plain squarewave divided by 32 (16Hz). IOW no steps.

Can anyone point out a design fault in this circuit or other reason
why it might not work?


Sure. You need the opamp stage at the 4051 output.
A small cap (1n or so) across the 1K feedback resistor will be welcomed too.

--
Thanks,
Fred.