3 ms·
Makes sense. Just another digital bus. Bummer. https://en.wikipedia.org/wiki/I%C2%B2S https://en.wikipedia.org/wiki/I%C2%B2S
by pedrocr 6y ago
Makes sense. Just another digital bus. Bummer.
https://en.wikipedia.org/wiki/I%C2%B2S https://en.wikipedia.org/wiki/I%C2%B2S
- monocasa 6y agoEh, a decent audio DAC pretty much requires another chip since it takes up a ton of die space, so you'd be an absolute fool to use the same process node as your logic. Since this looks to be beagleboard compatible, you should be able to use an audio cape like this https://www.element14.com/community/docs/DOC-67906/l/beaglebone-audio-cape https://www.element14.com/community/docs/DOC-67906/l/beagleb... If you don't care about it being decent, you can just use the PWM channels like the RPi does.
- pedrocr 6y agoI don't really want audio. What I'm looking for is to read 3.3V or 5V analog levels, with really low frequency, once a second or less would be fine.
- monocasa 6y agoIn that case you can probably hook up the GPIOs to a resistor ladder if you know the shape of the analog signal you're trying to sample.
- jononor 6y agoMany cheap and easy to interface I2C and SPI chips for that, which is the way the industry is going generally. Or throw in a tiny Arduino with stock Firmata firmware, and use that as an I/O extender.
- pedrocr 6y agoThat's the extra hardware I mentioned. I guess I wish the RPi just included one of those chips and had say 4 to 8 pins for ADC. It would make things simpler versus having to find something already well integrated or building it.
- Tyr42 6y agoThe solution I'm going for (for a similar problem, reading moisture from multiple plants on one esp8266) is tying the outputs from all the sensors together, and only turning on one at a time Like this guy: https://github.com/sfgabe/custom_scripts/blob/master/plant_monitor.ino https://github.com/sfgabe/custom_scripts/blob/master/plant_m...