[beagleboard] Re: 16+ Analog Input Options for Beaglebone
It might be easiest to purchase a few multi-channel, 5V compatible A/D converter ICs that feature an I2C or SPI interface, and use that interface to connect them to the BB. A quick search at a distributor's website will give you multiple devices to choose from, like the MCP3002. On Monday, September 1, 2014 8:47:24 AM UTC-5, jona.he...@gmail.com wrote: I would like to use the BeagleBone to acquire 16 analog signals. The transducers will be a mix of resistive temperature and current sensors. The temperature sensors will produce a signal between 0~5V and the current transformers will output of 0~0.333V. The BeagleBone Black is limited to 7 analog inputs. I was not able to find a cape that offers 16 analog inputs. 1. Does a BeagleBone Black cape exist that will multiplex and signal condition 16 analog signals (0~5V). 2. If this does not exist, can one of the BeagleBone experts recommend an alternative. Thanks in advance. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: 16+ Analog Input Options for Beaglebone
A common practice to increase the number of ADC channels is to use an Analog Multiplexer (MUX). Use a few GPIO bits to control the addressing. You can provide a single point buffer to support the 0-5 to 0-1.8V scaling. Cheers On Monday, September 1, 2014 9:47:24 AM UTC-4, jona.he...@gmail.com wrote: I would like to use the BeagleBone to acquire 16 analog signals. The transducers will be a mix of resistive temperature and current sensors. The temperature sensors will produce a signal between 0~5V and the current transformers will output of 0~0.333V. The BeagleBone Black is limited to 7 analog inputs. I was not able to find a cape that offers 16 analog inputs. 1. Does a BeagleBone Black cape exist that will multiplex and signal condition 16 analog signals (0~5V). 2. If this does not exist, can one of the BeagleBone experts recommend an alternative. Thanks in advance. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
