I have scored some piezo push button switches from an old heavy duty intercom and I would like to interface them to a Particle Photon.
They look a little like this: https://uk.rs-online.com/web/p/products/0224350/
(no LED inside the light).
From connecting a multimeter, it seems they are momentary action and produce a small voltage spike - around 0.005V
Does anyone have any suggestions regarding circuitry to interface the switch to a Particle Photon and how to use it as an interrupt driven switch?