COVID 19 Ventilator

Do  not parallel L298 brushed motor drivers because they are bipolar transistors. Paralleling may be possible however with MOSFETs.

3D printed PLA plastic needs to be annealed to 110℃ as otherwise the 'glass transition temperature' i.e. 'softening' of PLA plastic is only 60℃. A low softening temperature will interfere with disinfection. Annealing will shorten and thicken PLA objects slightly ,so care needs to be taken to adjust dimensions for close fit.

I am eliminating  MPS20N0040D as a pressure sensor possibility.It is only specified for dry non-corrosive gases and the sensitivity might be a problem ,it has no on-chip data conditioning and a stable difference amplifier is needed to amplify its analogue output. Its construction  4  resistors in a wheatstone bridge configuration. Trying out Bosch BMP280   temperature and pressure sensor which has SPI and I 2 C. Beware there are knock-off breakout  boards cloning Adafruit's superior breakout boards  that advertise the superior Bosch BME280 temperature,pressure and humidity which actually have the inferior Bosch BMP280. See https://goughlui.com/2018/08/05/note-bosch-sensortec-bmp280-vs-bme280-sensor-confusion/    the BMP280 boards also have to have the Adafruit BMP280test example program in Arduino has to be changed to /***************************************************************************   This is a library for the BMP280 hu...