Pololu 5V 3A Step-Up/Step-Down Voltage Regulator S13V30F5 9v 1a and then uploaded to the

and then uploaded to the board

Take this item as prevention than a cure

3 ~ 5V Arduino board power supply or DB9 interface power supply

Pressure and Gas Sensor - STEMMA QT environmental sensor with I2C Current item Adafruit ENS160 MOX Gas Sensor - Sciosense CCS811 Upgrade - STEMMA QT / Qwiic gas sensor with I2C STEMMA QT connector

Decoupling: Provide local energy reserves near ICs and voltage regulators

Pololu 5V 3A Step-Up/Step-Down Voltage Regulator S13V30F5 9v 1a and then uploaded to the5V that survives battery sag. This Pololu buck boost regulator holds a steady 5V while the input swings anywhere from 2. 8V to 22V, so a battery pack can discharge right through 5V without browning out your logic. Good for around 3A continuous depending on input voltage and cooling, at 85 to 95% typical efficiency. Specs Model Pololu S13V30F5 Type Buck boost (step up step down) regulator Input voltage 2. 8V to 22V Output voltage 5V fixed (3%)