"Pointless and demeaning commentary deleted"
Who deleted my post and why?


Another insulting and pointless comment removed by moderator.

 

Two Cmos inverters form a square-wave generator, not a white-noise (random frequencies) generator.
One Cmos Schmitt-trigger inverter forms a square-wave generator. It also is not random.

A 3V battery quickly drops to 2V which is too low for an ordinary CD4xxx Cmos IC. Even a 74HCxxx Cmos IC will have an extremely low output current at 2V and 3V.

If I remember right it's pretty easy to make a white noise generator from CMOS gates or inverters. But i've never done it.

As for the output power, yes it's low but the CMOS outputs will drive rail to rail and with push-pull it will be QUITE audible even from say 2.5v which will put out close to 5v peak to peak. This I have done and a CMOS push-pull driver into an 8 ohm speaker (even with a safety series resistor) is annoyingly loud. It should be quite capable of making the "subtle" white noise to amuse baby.