Analog I/O


9 posts
by Blars » Sun Aug 28, 2011 7:19 am
Many microcontrolers and some ARM chips offer on-chip analog to digital and
less commonly digital to analog. This is usually an alternative to GPIO selected per-pin. Does the chip selected offer this on the pins available via the GPIO connector, or will we need to use external I2C or SPI converters to get analog I/O. (A PIC or AVR may be the cheapest way to do that.)
Posts: 88
Joined: Sun Aug 28, 2011 3:22 am
by elatllat » Wed Feb 17, 2016 12:36 am
No Analog.
http://raspberrypi.stackexchange.com/search?q=search%20first
https://google.com/search?q=site%3Awww.raspberrypi.org+search+first
https://www.raspberrypi.org/forums/search.php?search_id=unanswered
Posts: 1336
Joined: Sat Dec 17, 2011 5:05 pm
by DirkS » Wed Feb 17, 2016 1:02 am
elatllat wrote:No Analog.

This must be the mother of all necros...
Posts: 6387
Joined: Tue Jun 19, 2012 9:46 pm
Location: Essex, UK
by mikronauts » Wed Feb 17, 2016 4:32 am
No analog inputs.

I normally use MCP3008 & MCP3208 ten and twelve bit (respectively) eight channel ADC's

See http://www.mikronauts.com/raspberry-pi/ ... and-howto/

Blars wrote:Many microcontrolers and some ARM chips offer on-chip analog to digital and
less commonly digital to analog. This is usually an alternative to GPIO selected per-pin. Does the chip selected offer this on the pins available via the GPIO connector, or will we need to use external I2C or SPI converters to get analog I/O. (A PIC or AVR may be the cheapest way to do that.)
http://Mikronauts.com - home of EZasPi, RoboPi, Pi Rtc Dio and Pi Jumper @Mikronauts on Twitter
Advanced Robotics, I/O expansion and prototyping boards for the Raspberry Pi
User avatar
Posts: 2179
Joined: Sat Jan 05, 2013 7:28 pm
by W. H. Heydt » Wed Feb 17, 2016 4:44 am
DirkS wrote:
elatllat wrote:No Analog.

This must be the mother of all necros...

No kidding. Almost 4.5 years...
Posts: 4942
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)
by elatllat » Wed Feb 17, 2016 5:18 am
W. H. Heydt wrote:
DirkS wrote:
elatllat wrote:No Analog.

This must be the mother of all necros...

No kidding. Almost 4.5 years...

I hope Blars is happy with 'better late than never'.
http://raspberrypi.stackexchange.com/search?q=search%20first
https://google.com/search?q=site%3Awww.raspberrypi.org+search+first
https://www.raspberrypi.org/forums/search.php?search_id=unanswered
Posts: 1336
Joined: Sat Dec 17, 2011 5:05 pm
by buja » Wed Feb 17, 2016 6:17 am
elatllat wrote:I hope Blars is happy with 'better late than never'.

I'm afraid not: looking at his profile, Blars' last visit was in November 2012 ...
User avatar
Posts: 289
Joined: Wed Dec 31, 2014 8:21 am
Location: Netherlands
by mosespi » Wed Feb 17, 2016 6:35 am
Cue up a reply from 2020...

"Sure, the Pi 6 B++ has twelve 48-bit ADCs on the original GPIO ports 10-22... but good luck finding those old 0.1" headers anymore!"
Power problems? MoPower UPS for the Pi
http://www.allspectrum.com/mopower/
Posts: 186
Joined: Mon May 12, 2014 3:35 pm
by texy » Wed Feb 17, 2016 7:24 am
I'm pretty sure those headers will still be here in 4 years time....2120 however.....

Texy
Various male/female 40- and 26-way GPIO header for sale here ( IDEAL FOR YOUR PiZero ):
https://www.raspberrypi.org/forums/viewtopic.php?f=93&t=147682#p971555
Forum Moderator
Forum Moderator
Posts: 4375
Joined: Sat Mar 03, 2012 10:59 am
Location: Berkshire, England