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A project log for VISP - Ventilator Inline Sensor Package

Bidirectional flow (volume), pressure, and temperature sensing in a single inexpensive I2C/SPI package.

Daren SchwenkeDaren Schwenke 04/06/2020 at 20:490 Comments

Copy/paste courtesy of @Steven.Carr.  These are in-progress files, so don't go spinning up 1000 of them and expect nothing to change.  :)

Files are up on Github here.

VISP-BREAKOUT is a small single sided breakout board with the 4 sensors in the right places brought out to SMD pads for soldering wires

VISP-I2C-DUAL is a small board with 4 sensors, and a 6-wire interface.   2-channels of I2C and VCC+GND

VISP-I2C-MUX is a 4-wire I2C interface with a I2C bus multiplexer to switch between the 2 sets of I2C sensors

VISP-I2C-XLATE was our first design.   Single 4-wire I2C interface with all of the sensors visible on the same bus

VISP-SMART is a unreviewed completely 3v3 design with an atmega328 on board and useful pins brought out to SMD solder pads on the back.

VISP-SPI is an 8-wire interface to the sensors, using a 3-to-8 decoder to convert A0:2 into a Chip Select (where address 000 is unselected so the bus can be shared.  8 wires so an RJ45 jack can be used at the core controller for connectivity)

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