This mask is a fictional resemblance that uses a simple circuit with a bunch of transistors to amplify the incoming signal for detection of negative ions. Negative ions are said to found in abundance near nature/mountains/waterfalls etc…, also emitted by air purifiers as they help in settling dust.
Ion Detection Circuit
I hooked up this circuit to a mask. Upon detection of the ions, the led glows and trips a small vibrating motor which sits near the nasal support providing feedback.
The first prototype that kinda works, but needs better analog circuitry for precise detection . Will hopefully rework this in the future when I feel there is a need ;D