I built a Scuba compressor and it is controlled by an Arduino (UNO) On that UNO I have: 4 buttons - Start and stop (Compressor, Oxygen solenoid, purging timer circuit, Oxygen calibration) 4 Relays - Output for 3 buttons and the last one for an alarm 4 sensors - High Pressure (PSI while filling t…

Arduino (Counter as a Dead man Switch)

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