PCBgogo

In responding to the current world situation, cq. facing Covid-19 Pandemic so we try to design and to make devices to help people, so we herewith design the Simple Ventilator System (SVS ) that mainly using Ambu bag. Hopefully this system can help people respiratory and this system can be made semi open system, open an option to be sell as a complete kit.
This Ventilator System contains 2 Electronic Circuit Boards, the Ventilator Controller & the Ventilator CPU. Herewith in this first section we describe the Ventilator Controller which is based on Arduino's L293D Motor Driver Shield that be modified & be added for the HMI (Human Machine Interface) as follows:
1. As 2 pins for I2C protocol are needed, so modify connection pin D13 (suppose for I2C SCL)
    to pin D1  of  Arduino board, but for connecting the 2 I2C ICs (the PCF8574 I/O Expander &
    the PCF8563T RTC IC) by cables to J20 port for SCL (D13), SDA (D12) & GND pin connection.
2. The PCF8574 I/O Expander will provide connections for 5 LEDs - L1 to L5 and 1 Buzzer as HMI      
     outputs, 2 jumpers for setting as HMI inputs.
3. Add ESP-01 WiFi module via J13 hence make this system as Medical Internet of Things
4. Add J16 for I2C connection i.e for external pressure sensor(s) as well as J10 & J17 but via
     separate I2C control by ESP-01 module
5. Add U5 to accomodate on-board pressure sensor connection & its preconditioning circuit
6. Add J5, J6, J7 & J8 for external sensor(s) or potentiometer for setting
7. Add J11 & J12 for connecting external switches