now, how to get that LED into the water stream......
There is a company that manufactures a little water generator... turbine and magnets inside the pipe pick-up coils and DC regulator outside. Anyone with a small machine shop could duplicate the design easily. Or just buy something like this.
The power generator power could easily power an Arduino + tri-color LED... the LED being cemented into the "spigot aerator".
Ray
you can get an RTD from e-bay with an environmental enclosure for under $20
a thermistor in a simple screw type "thermowell" for under $10
ditto of screw type for a thermocouple.
seems the days of the massive themowell have passed. now they take simple screw, drill it, pot the sensor and fill with potting compound and call it a probe.
mount it on a plate, drill a large hole in the duct and screw on the plate. all very easy.
still waiting for parts to arrive.
Found the BME280 by Bosch is a serial I2C or SPI chip that does RH and temp AND absolute pressure
numbers look interesting. there is a newer version, one with a MEMS gas sensor, but it was released in Feb 2016, still not available in distribution channels.
CAREFUL !
both are the same cost on E-bay, but one appears to have a voltage regulator.
the BME280 itself is a 3.3 volt device !!
Supply voltage VDDIO 1.2 - 3.6V
Supply voltage VDD 1.71 ... 3.6 V
SOME suppliers (adafruit) offer level shifting, voltage regulator, etc on the board.
the pics are from E-BAY and are very questionable.
I see the front of the board AND back in some ads, some just the front.
makes me concerned that some suppliers are just the chip, no level shifting, no VR.......
