JLJu
commented
5 years ago 5V + 3.3 power on teensy https://forum.pjrc.com/threads/47966-Teensy-3-6-5V-and-3-3V-workaround
Closed JLJu closed 5 years ago
JLJu
commented
5 years ago 5V + 3.3 power on teensy https://forum.pjrc.com/threads/47966-Teensy-3-6-5V-and-3-3V-workaround
File layout 1 https://github.com/BasicAirData/AirDataComputer/blob/master/Support/Brainstorming/Layout1.pdf Source included
Layout 1 uses 5v amplified sensors. A dedicated IC performs analog to digital conversion for all sensors signals. ADS IC had one SPI interface that is read by a Teensy 3.6 Board. Cost of electronic components (- Teensy3.6) for airborne application is 310 Eur; bike application components cost 222 Eur Total Nos. 6 sensors. 55 Eur static + 5X46 Eur DeltaP + 25 Eur ADS (I will add an accessory voltage regulator soon)
Everything seems to fit together. However, there is an issue here. In the new system layout the Teensy board is disjoined from sensors board. That fact implicates that SPI bus should connect two board at a certain distance.
As you know, SPI is not able to cope with long connections.
Now the point. Should we review the system layout or instead, let's say, fit a supplementary microcontroller near the sensors and equip the communication line with a RS 485 transceiver?
Cheers :-)
Reference Brainstorming URL: https://www.basicairdata.eu/projects/air-data-systems/brainstorming-air-data-system-winter-2018-2019/