Arduino: R-2R: Buffer, Attenuate, and Filter

RE: Arduino: R-2R: Buffer, Attenuate, and Filter

Jan Cumps — Mon, 30 Apr 2018 17:43:02 GMT

For the CD4066, did you have to do something special, except giving it power?
Did you hook up the logic inputs directly to the Arduino outputs (which should be fine I think)?

RE: Arduino: R-2R: Buffer, Attenuate, and Filter

DAB — Sun, 22 Apr 2018 17:14:11 GMT

Yes, Analog circuits can humble the best engineer.

Nice overview of the circuit and your results.

Breadboards are notorious for noise and floating grounds, so having the oscillations is par for the course.

Even at relatively low frequencies, you get interesting results. All of those component leads are antennas just waiting to add high frequency noise.

Good job.

DAB

RE: Arduino: R-2R: Buffer, Attenuate, and Filter

jw0752 — Sun, 22 Apr 2018 16:47:20 GMT

Hi Jon,

Thank you for taking the time to post experiments like this. I am always fascinated and your posts are always a learning experience for me.

John

RE: Arduino: R-2R: Buffer, Attenuate, and Filter

Jan Cumps — Sun, 22 Apr 2018 11:20:38 GMT

How did you make the scope trace? looping fast trhrough the 16 levels?